build system: created skeleton.

44 files changed, 3201 insertions, 0 deletions

diff --git a/sofort/ccenv/ccenv.in b/sofort/ccenv/ccenv.in
new file mode 100644
index 0000000..61f9897
--- /dev/null
+++ b/sofort/ccenv/ccenv.in
@@ -0,0 +1,88 @@
+# @ccenv_cfgtype@ system flavor
+OS                              = @ccenv_os@
+OS_SEMANTICS                    = @ccenv_os_semantics@
+
+OS_DSO_EXRULES                  = @ccenv_os_dso_exrules@
+OS_DSO_LINKAGE                  = @ccenv_os_dso_linkage@
+
+OS_APP_PREFIX                   = @ccenv_os_app_prefix@
+OS_APP_SUFFIX                   = @ccenv_os_app_suffix@
+
+OS_LIB_PREFIX                   = @ccenv_os_lib_prefix@
+OS_LIB_SUFFIX                   = @ccenv_os_lib_suffix@
+
+OS_IMPLIB_EXT                   = @ccenv_os_implib_ext@
+OS_LIBDEF_EXT                   = @ccenv_os_libdef_ext@
+
+OS_ARCHIVE_EXT                  = @ccenv_os_archive_ext@
+OS_SONAME                       = @ccenv_os_soname@
+
+OS_LIB_PREFIXED_SUFFIX          = @ccenv_os_lib_prefixed_suffix@
+OS_LIB_SUFFIXED_SUFFIX          = @ccenv_os_lib_suffixed_suffix@
+
+# @ccenv_cfgtype@ characteristics
+CC_HOST                         = @ccenv_cc_host@
+CC_BITS                         = @ccenv_cc_bits@
+
+CC_ARFMT                        = @ccenv_cc_arfmt@
+CC_SOFMT                        = @ccenv_cc_sofmt@
+CC_BINFMT                       = @ccenv_cc_binfmt@
+CC_UNDERSCORE                   = @ccenv_cc_underscore@
+
+CC_ARCH_BFD                     = @ccenv_cc_arch_bfd@
+CC_ARCH_LLVM                    = @ccenv_cc_arch_llvm@
+
+# incompatible tool variants
+AS_ASM                          = @ccenv_as_asm@
+AS_LL                           = @ccenv_as_ll@
+AS_MC                           = @ccenv_as_mc@
+
+LD_BFD                          = @ccenv_ld_bfd@
+LD_GOLD                         = @ccenv_ld_gold@
+LD_LLD                          = @ccenv_ld_lld@
+
+OBJDUMP_BFD                     = @ccenv_objdump_bfd@
+OBJDUMP_LLVM                    = @ccenv_objdump_llvm@
+
+READELF_BFD                     = @ccenv_readelf_bfd@
+READELF_LLVM                    = @ccenv_readelf_llvm@
+
+# @ccenv_cfgtype@ primary tools
+CC                              = @ccenv_cc@
+CPP                             = @ccenv_cpp@
+CXX                             = @ccenv_cxx@
+
+AR                              = @ccenv_ar@
+NM                              = @ccenv_nm@
+OBJDUMP                         = @ccenv_objdump@
+RANLIB                          = @ccenv_ranlib@
+SIZE                            = @ccenv_size@
+STRIP                           = @ccenv_strip@
+STRINGS                         = @ccenv_strings@
+
+ADDR2LINE                       = @ccenv_addr2line@
+COV                             = @ccenv_cov@
+CXXFILT                         = @ccenv_cxxfilt@
+OBJCOPY                         = @ccenv_objcopy@
+
+ELFEDIT                         = @ccenv_elfedit@
+READELF                         = @ccenv_readelf@
+READOBJ                         = @ccenv_readobj@
+
+PERK                            = @ccenv_perk@
+MDSO                            = @ccenv_mdso@
+DLLTOOL                         = @ccenv_dlltool@
+
+WINDMC                          = @ccenv_windmc@
+WINDRC                          = @ccenv_windrc@
+
+# @ccenv_cfgtype@ secondary tools
+# note: the direct use of $(@ccenv_makevar_prefix@LD) is highly discouraged
+AS                              = @ccenv_as@
+LD                              = @ccenv_ld@
+
+# @ccenv_cfgtype@ cflags
+CFLAGS_OS                      += -DOS_LIB_SUFFIX=\"@ccenv_os_lib_suffix@\"
+CFLAGS_OS                      += @ccenv_cflags_os@
+CFLAGS_PIC                     += @ccenv_cflags_pic@
+
diff --git a/sofort/ccenv/ccenv.sh b/sofort/ccenv/ccenv.sh
new file mode 100644
index 0000000..62caa96
--- /dev/null
+++ b/sofort/ccenv/ccenv.sh
@@ -0,0 +1,1476 @@
+# ccenv.sh: sofort's tool-finding bits,
+# invoked from within the project-agnostic configure script.
+
+# this file is covered by COPYING.SOFORT.
+
+# invocation and names of binary tools:
+# agnostic names (ar, nm, objdump, ...);
+# target-prefixed agnostic names (x86_64-nt64-midipix-ar, ...);
+# branded names (llvm-ar, llvm-nm, llvm-objdump, ...);
+# target-prefixed branded names (x86_64-linux-gnu-gcc-ar, ...);
+# target-specifying branded tools (llvm-ar --target=x86_64-linux, ...).
+
+# cross-compilation: default search order:
+# target-prefixed agnostic tools;
+# target-prefixed branded tools, starting with the prefix
+# most commonly associated with the selected compiler (that is,
+# ``gcc'' when using gcc, and ``llvm'' when using clang);
+# target-speficying branded tools, starting once again with the
+# prefix most commonly associated with the selected compiler.
+
+# internal variables of interest:
+# ccenv_cfgtype: the type of host being tested (host/native)
+# ccenv_cfgfile: the configuration file for the host being tested
+# ccenv_cflags:  the comprehensive cflags for the host being tested
+# ccenv_cchost:  the host being tested, as reported by -dumpmachine
+
+
+ccenv_usage()
+{
+	cat "$mb_project_dir"/sofort/ccenv/ccenv.usage
+	exit 0
+}
+
+
+ccenv_newline()
+{
+	printf '\n' >> "$ccenv_cfgfile"
+}
+
+
+ccenv_comment()
+{
+	ccenv_internal_str='#'
+
+	for ccenv_internal_arg ; do
+		ccenv_internal_str="$ccenv_internal_str $ccenv_internal_arg"
+	done
+
+	printf '%s\n' "$ccenv_internal_str" >> "$ccenv_cfgfile"
+}
+
+
+ccenv_tool_prolog()
+{
+	ccenv_line_dots='.....................................'
+	ccenv_tool_desc=" == checking for ${1}"
+	ccenv_tool_dlen="${#ccenv_line_dots}"
+
+	printf '\n%s\n' '________________________' >&3
+	printf "ccenv: checking for ${1}\n\n" >&3
+	printf "%${ccenv_tool_dlen}.${ccenv_tool_dlen}s" \
+		"${ccenv_tool_desc}  ${mb_line_dots}"
+}
+
+
+ccenv_tool_epilog()
+{
+	ccenv_line_dots='................................'
+	ccenv_tool_dlen="$((${#ccenv_line_dots} - ${#1}))"
+
+	case ${ccenv_tool_dlen} in
+		0 | -* )
+			ccenv_tool_dlen='3' ;;
+	esac
+
+	printf "%${ccenv_tool_dlen}.${ccenv_tool_dlen}s  %s.\n" \
+		"${ccenv_line_dots}" "${1}"
+
+	if [ "${1}" = 'false' ]; then
+		printf '\n\nccenv: not (yet) found.\n' >&3
+	else
+		printf "\n\nccenv : found $(command -v ${1}).\n" >&3
+	fi
+
+	printf '%s\n' '------------------------' >&3
+}
+
+
+ccenv_tool_variant_epilog()
+{
+	ccenv_expr=${1}='${'${1}':-false}'
+	eval "$ccenv_expr"
+
+	ccenv_expr='${'${1}'}'
+	eval ccenv_tool_epilog "$ccenv_expr"
+}
+
+
+ccenv_attr_prolog()
+{
+	ccenv_line_dots=' .....................................'
+	ccenv_attr_desc=" == detect ${ccenv_cfgtype} ${1}"
+	ccenv_attr_dlen="${#ccenv_line_dots}"
+
+	printf "%${ccenv_attr_dlen}.${ccenv_attr_dlen}s" \
+		"${ccenv_attr_desc} ${ccenv_line_dots}"
+
+	printf '\n%s\n' '________________________' >&3
+	printf "ccenv: detecting ${1}\n\n" >&3
+}
+
+
+ccenv_attr_epilog()
+{
+	ccenv_line_dots='................................'
+	ccenv_tool_dlen="$((${#ccenv_line_dots} - 1 - ${#1}))"
+
+	case ${ccenv_tool_dlen} in
+		0 | -* )
+			ccenv_tool_dlen='3' ;;
+	esac
+
+	printf "%${ccenv_tool_dlen}.${ccenv_tool_dlen}s  %s.\n" \
+		"${ccenv_line_dots}" "${1}"
+
+	printf '\n\nccenv: detected result: %s\n' "${1}" >&3
+	printf '%s\n' '------------------------' >&3
+}
+
+
+ccenv_find_tool()
+{
+	if [ -z "$ccenv_prefixes" ]; then
+		for ccenv_candidate in $(printf '%s' "$ccenv_candidates"); do
+			ccenv_cmd_args="${@:-}"
+
+			if [ -z "$ccenv_cmd_args" ]; then
+				if command -v "$ccenv_candidate" > /dev/null; then
+					ccenv_tool="$ccenv_candidate"
+					return 0
+				fi
+			else
+				if command -v "$ccenv_candidate" > /dev/null; then
+					if "$ccenv_candidate" $@ > /dev/null 2>&3; then
+						ccenv_tool="$ccenv_candidate"
+						return 0
+					fi
+				fi
+			fi
+		done
+
+		ccenv_tool=false
+
+		return 0
+	fi
+
+	for ccenv_prefix in $(printf '%s' "$ccenv_prefixes"); do
+		for ccenv_candidate in $(printf '%s' "$ccenv_candidates"); do
+			ccenv_tool="$ccenv_prefix$ccenv_candidate"
+
+			if command -v "$ccenv_tool" > /dev/null; then
+				return 0
+			fi
+		done
+	done
+
+	for ccenv_candidate in $(printf '%s' "$ccenv_candidates"); do
+		if command -v "$ccenv_candidate" > /dev/null; then
+			ccenv_tool="$ccenv_candidate"
+			return 0
+		fi
+	done
+
+	ccenv_tool=false
+
+	return 0
+}
+
+
+ccenv_set_primary_tools()
+{
+	ccenv_core_tools="ar nm objdump ranlib size strip strings objcopy"
+	ccenv_hack_tools="addr2line cov elfedit readelf readobj otool"
+	ccenv_peep_tools="perk mdso dlltool windmc windres"
+
+	for __tool in $(printf '%s' "$ccenv_core_tools $ccenv_hack_tools $ccenv_peep_tools"); do
+		ccenv_tool_prolog "$__tool"
+
+		if [ -n "$mb_agnostic" ]; then
+			ccenv_candidates=" $__tool"
+
+		elif [ -n "$mb_zealous" ]; then
+			ccenv_candidates="$mb_zealous-$__tool"
+
+		elif [ "$mb_toolchain" = 'gcc' ]; then
+			ccenv_candidates="gcc-$__tool"
+			ccenv_candidates="$ccenv_candidates $__tool"
+			ccenv_candidates="$ccenv_candidates llvm-$__tool"
+
+		elif [ "$mb_toolchain" = 'llvm' ]; then
+			ccenv_candidates="llvm-$__tool"
+			ccenv_candidates="$ccenv_candidates $__tool"
+			ccenv_candidates="$ccenv_candidates gcc-$__tool"
+
+		elif [ -n "$mb_toolchain" ]; then
+			ccenv_candidates="$mb_toolchain-$__tool"
+			ccenv_candidates="$ccenv_candidates $__tool"
+			ccenv_candidates="$ccenv_candidates gcc-$__tool"
+			ccenv_candidates="$ccenv_candidates llvm-$__tool"
+
+		else
+			ccenv_candidates="$__tool"
+			ccenv_candidates="$ccenv_candidates gcc-$__tool"
+			ccenv_candidates="$ccenv_candidates llvm-$__tool"
+		fi
+
+		if [ "$ccenv_cfgtype" = 'host' ]; then
+			ccenv_var_prefix='mb_'
+		else
+			ccenv_var_prefix='mb_native_'
+		fi
+
+		ccenv_var_name=$ccenv_var_prefix$__tool
+		ccenv_var_expr='${'$ccenv_var_name':-}'
+		eval ccenv_var_val=$ccenv_var_expr
+
+		if [ -n "$ccenv_var_val" ]; then
+			eval ccenv_$__tool="$ccenv_var_val"
+		else
+			ccenv_find_tool
+			eval ccenv_$__tool="$ccenv_tool"
+		fi
+
+		ccenv_tool_epilog "$ccenv_tool"
+	done
+
+	# windrc
+	ccenv_windrc="$ccenv_windres"
+
+	# archive format preamble
+	ccenv_libgcc_a_header=$(od -b -N8 $($ccenv_cc -print-file-name=libgcc.a) | head -n1)
+	ccenv_cc_arfmt='common'
+
+	# ar (big)
+	ccenv_bigaf_header=$(printf '%s\n' '<bigaf>' | od -b | head -n1)
+
+	if [ "$ccenv_libgcc_a_header" = "$ccenv_bigaf_header" ]; then
+		ccenv_cc_arfmt='bigaf'
+
+		for __tool in $(printf '%s' "$ccenv_core_tools"); do
+			ccenv_var_name=ccenv_$__tool
+			ccenv_var_expr='${'$ccenv_var_name':-}'
+			eval ccenv_var_val="$ccenv_var_expr"
+
+			if [ "$ccenv_var_val" != false ]; then
+				ccenv_var_val="$ccenv_var_val -X64"
+				ccenv_var_expr='${ccenv_var_val:-}'
+				eval ccenv_$__tool="$ccenv_var_expr"
+			fi
+		done
+	fi
+
+	# ar (small)
+	ccenv_aiaff_header=$(printf '%s\n' '<aiaff>' | od -b | head -n1)
+
+	if [ "$ccenv_libgcc_a_header" = "$ccenv_aiaff_header" ]; then
+		ccenv_cc_arfmt='aiaff'
+
+		for __tool in $(printf '%s' "$ccenv_core_tools"); do
+			ccenv_var_name=ccenv_$__tool
+			ccenv_var_expr='${'$ccenv_var_name':-}'
+			eval ccenv_var_val="$ccenv_var_expr"
+
+			if [ "$ccenv_var_val" != false ]; then
+				ccenv_var_val="$ccenv_var_val -X32"
+				ccenv_var_expr='${ccenv_var_val:-}'
+				eval ccenv_$__tool="$ccenv_var_expr"
+			fi
+		done
+	fi
+}
+
+ccenv_set_tool_variants()
+{
+	# as (asm)
+	ccenv_tool_prolog 'as (asm)'
+	ccenv_candidates=as
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" = false ]; then
+		ccenv_as_asm=
+	else
+		$ccenv_tool --help 2>&1 | grep -i '.bc assembler' \
+		|| ccenv_as_asm="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_as_asm'
+
+	# as (ll)
+	ccenv_tool_prolog 'as (ll)'
+	ccenv_candidates=llvm-as
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_as_ll="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_as_ll'
+
+	# as (mc)
+	ccenv_tool_prolog 'as (mc)'
+	ccenv_candidates=llvm-mc
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_as_mc="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_as_mc'
+
+	# ld (bfd)
+	ccenv_tool_prolog 'ld (bfd)'
+	ccenv_candidates=ld.bfd
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_ld_bfd="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_ld_bfd'
+
+	# ld (gold)
+	ccenv_tool_prolog 'ld (gold)'
+	ccenv_candidates=ld.gold
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_ld_gold="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_ld_gold'
+
+	# ld (lld)
+	ccenv_tool_prolog 'ld (lld)'
+	ccenv_candidates=lld
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" != false ]; then
+		ccenv_ld_lld="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_ld_lld'
+
+	# objdump (bfd)
+	ccenv_tool_prolog 'objdump (bfd)'
+	ccenv_candidates=objdump
+	ccenv_find_tool
+
+	if $ccenv_tool --version | grep -i Binutils > /dev/null; then
+		ccenv_objdump_bfd="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_objdump_bfd'
+
+	# objdump (llvm)
+	ccenv_tool_prolog 'objdump (llvm)'
+	ccenv_candidates=llvm-objdump
+	ccenv_find_tool
+
+	if $ccenv_tool --version | grep -i LLVM > /dev/null; then
+		ccenv_objdump_llvm="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_objdump_llvm'
+
+	# readelf (bfd)
+	ccenv_tool_prolog 'readelf (bfd)'
+	ccenv_candidates=readelf
+	ccenv_find_tool
+
+	if $ccenv_tool --version | grep -i Binutils > /dev/null; then
+		ccenv_readelf_bfd="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_readelf_bfd'
+
+	# readelf (llvm)
+	ccenv_tool_prolog 'readelf (llvm)'
+	ccenv_candidates=llvm-readelf
+	ccenv_find_tool
+
+	if $ccenv_tool --version | grep -i LLVM > /dev/null; then
+		ccenv_readelf_llvm="$ccenv_tool"
+	fi
+
+	ccenv_tool_variant_epilog 'ccenv_readelf_llvm'
+
+	# as
+	if [ -n "$ccenv_cc" ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'CC) -c -x assembler'
+	elif [ -n "$mb_agnostic" ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_ASM)'
+	elif [ "$mb_zealous" = 'gcc' ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_ASM)'
+	elif [ -n "$mb_zealous" = 'llvm' ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_MC)'
+	elif [ "$mb_toolchain" = 'gcc' ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_ASM)'
+	elif [ "$mb_toolchain" = 'llvm' ]; then
+		ccenv_as='$('"$ccenv_makevar_prefix"'AS_MC)'
+	fi
+
+	# ld
+	if [ -n "$ccenv_cc" ]; then
+		ccenv_ld='$('"$ccenv_makevar_prefix"'CC) -nostdlib -nostartfiles'
+	fi
+}
+
+ccenv_set_c_compiler_candidates()
+{
+	if   [ -n "$mb_compiler" ]; then
+		ccenv_candidates="$mb_compiler"
+
+	elif [ -n "$mb_agnostic" ]; then
+		ccenv_candidates="c99 c11 cc"
+
+	elif [ "$mb_zealous" = 'gcc' ]; then
+		ccenv_candidates="gcc"
+
+	elif [ "$mb_zealous" = 'llvm' ]; then
+		ccenv_candidates="clang"
+
+	elif [ "$mb_toolchain" = 'gcc' ]; then
+		ccenv_candidates="gcc c99 c11 cc clang"
+
+	elif [ "$mb_toolchain" = 'llvm' ]; then
+		ccenv_candidates="clang c99 c11 cc gcc"
+
+	elif [ -n "$mb_toolchain" ]; then
+		ccenv_candidates="$mb_toolchain c99 c11 cc gcc clang"
+
+	else
+		ccenv_candidates="c99 c11 cc gcc clang"
+	fi
+}
+
+
+ccenv_set_cc()
+{
+	ccenv_tool_prolog 'C compiler'
+
+	if [ -z "$ccenv_cc" ]; then
+		ccenv_set_c_compiler_candidates
+		ccenv_find_tool -dumpmachine
+		ccenv_cc="$ccenv_tool"
+	fi
+
+	if [ "$ccenv_cc" = false ] && [ -n "$mb_compiler" ]; then
+		ccenv_cc="$mb_compiler"
+	fi
+
+	ccenv_cc_cmd="$ccenv_cc"
+	ccenv_errors=
+
+	if [ "$ccenv_cfgtype" = 'native' ]; then
+		ccenv_host=$(eval $ccenv_cc $(printf '%s' "$ccenv_cflags") -dumpmachine 2>&3)
+		ccenv_cchost=$ccenv_host
+		ccenv_tool_epilog "$ccenv_cc"
+		return 0
+	fi
+
+	if [ -n "$mb_cchost" ]; then
+		ccenv_host="$mb_cchost"
+	elif [ -n "$mb_host" ]; then
+		ccenv_host="$mb_host"
+	else
+		ccenv_host=
+	fi
+
+	if [ -z "$ccenv_host" ]; then
+		ccenv_host=$($ccenv_cc $(printf '%s' "$ccenv_cflags") -dumpmachine 2>&3)
+		ccenv_cchost=$ccenv_host
+	else
+		ccenv_tmp=$(mktemp ./tmp_XXXXXXXXXXXXXXXX)
+		ccenv_cmd="$ccenv_cc --target=$ccenv_host -E -xc -"
+
+		if [ -z "$mb_user_cc" ]; then
+			$(printf %s "$ccenv_cmd") < /dev/null > /dev/null \
+				2>"$ccenv_tmp" || true
+
+			ccenv_errors=$(cat "$ccenv_tmp")
+
+			if [ -z "$ccenv_errors" ]; then
+				ccenv_tflags="--target=$ccenv_host"
+				ccenv_cc="$ccenv_cc $ccenv_tflags"
+			else
+				printf '%s' "$ccenv_errors" >&3
+			fi
+		fi
+
+		rm -f "$ccenv_tmp"
+		unset ccenv_tmp
+
+		ccenv_cchost=$($ccenv_cc $(printf '%s' "$ccenv_cflags") -dumpmachine 2>&3)
+	fi
+
+	if [ "$ccenv_cchost" != "$ccenv_host" ]; then
+		printf 'error!\n' >&2
+		printf 'ccenv:\n' >&2
+		printf 'ccenv: ccenv_host:   %s \n' $ccenv_host >&2
+		printf 'ccenv: ccenv_cchost: %s \n' $ccenv_cchost >&2
+
+		if [ -z "$ccenv_tflags" ]; then
+			printf 'ccenv:\n' >&2
+			printf 'ccenv: ccenv_host and ccenv_cchost do not match, most likely because:\n' >&2
+			printf 'ccenv: (1) you explicitly set CC (or passed --compiler=...)\n' >&2
+			printf 'ccenv: (2) the selected compiler does not accept --target=...\n' >&2
+			printf 'ccenv: (3) the host reported by -dumpmachine differs from the one you requested.\n' >&2
+		fi
+
+		if [ -n "$ccenv_errors" ]; then
+			printf 'ccenv:\n' >&2
+			printf 'ccenv: something went wrong, see the command and compiler message below.\n\n' >&2
+			printf 'cmd: %s < /dev/null > /dev/null\n' "$ccenv_cmd" >&2
+			printf '%s\n\n' "$ccenv_errors" >&2
+		else
+			printf 'ccenv:\n' >&2
+			printf 'ccenv: something went wrong, bailing out.\n\n' >&2
+		fi
+
+		return 2
+	fi
+
+	ccenv_tool_epilog "$ccenv_cc"
+}
+
+ccenv_set_cpp()
+{
+	ccenv_tool_prolog 'C pre-processor'
+
+	case "$ccenv_cc_cmd" in
+		cc | c99 | c11 | gcc)
+			ccenv_cpp_prefix=
+			ccenv_candidates="cpp" ;;
+
+		clang )
+			ccenv_cpp_prefix=
+			ccenv_candidates="clang-cpp" ;;
+
+		*-cc )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-cc*}-
+			ccenv_candidates="${ccenv_cpp_prefix}cpp" ;;
+
+		*-c99 )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-c99*}-
+			ccenv_candidates="${ccenv_cpp_prefix}cpp" ;;
+
+		*-c11 )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-c11*}-
+			ccenv_candidates="${ccenv_cpp_prefix}cpp" ;;
+
+		*-gcc )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-gcc*}-
+			ccenv_candidates="${ccenv_cpp_prefix}cpp" ;;
+
+		*-clang )
+			ccenv_cpp_prefix=${ccenv_cc_cmd%-clang*}-
+			ccenv_candidates="${ccenv_cpp_prefix}clang-cpp" ;;
+
+		* )
+			ccenv_cpp="$ccenv_cc -E"
+			ccenv_tool_epilog "$ccenv_cpp"
+			return 0
+	esac
+
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" = false ]; then
+		ccenv_cpp="$ccenv_cc -E"
+	elif [ -n "$ccenv_tflags" ]; then
+		ccenv_cpp="$ccenv_tool $ccenv_tflags"
+	else
+		ccenv_cpp="$ccenv_tool"
+	fi
+
+	ccenv_tool_epilog "$ccenv_cpp"
+}
+
+ccenv_set_cxx()
+{
+	ccenv_tool_prolog 'C++ compiler'
+
+	case "$ccenv_cc_cmd" in
+		cc | c99 | c11 )
+			ccenv_cxx_prefix=
+			ccenv_candidates="cxx c++" ;;
+
+		gcc )
+			ccenv_cxx_prefix=
+			ccenv_candidates="g++" ;;
+
+		clang )
+			ccenv_cxx_prefix=
+			ccenv_candidates="clang++" ;;
+
+		*-gcc )
+			ccenv_cxx_prefix=${ccenv_cc_cmd%-gcc*}-
+			ccenv_candidates="${ccenv_cxx_prefix}g++" ;;
+
+		*-clang )
+			ccenv_cxx_prefix=${ccenv_cc_cmd%-clang*}-
+			ccenv_candidates="${ccenv_cxx_prefix}clang++" ;;
+
+		/*cc | /*c99 | /*c11 )
+			ccenv_cxx_prefix=${ccenv_cc_cmd%/*}
+			ccenv_candidates="${ccenv_cxx_prefix}/cxx"
+			ccenv_candidates="${ccenv_candidates} ${ccenv_cxx_prefix}/c++" ;;
+
+		/*gcc )
+			ccenv_cxx_prefix=${ccenv_cc_cmd%/*}
+			ccenv_candidates="${ccenv_cxx_prefix}/g++" ;;
+
+		/*clang )
+			ccenv_cxx_prefix=${ccenv_cc_cmd%/*}
+			ccenv_candidates="${ccenv_cxx_prefix}/clang++" ;;
+
+		* )
+			ccenv_cxx="$ccenv_cc -xc++"
+			ccenv_tool_epilog "$ccenv_cxx"
+			return 0
+	esac
+
+	ccenv_find_tool
+
+	if [ "$ccenv_tool" = false ]; then
+		ccenv_cxx="$ccenv_cc -xc++"
+	elif [ -n "$ccenv_tflags" ]; then
+		ccenv_cxx="$ccenv_tool $ccenv_tflags"
+	else
+		ccenv_cxx="$ccenv_tool"
+	fi
+
+	ccenv_tool_epilog "$ccenv_cxx"
+}
+
+ccenv_set_cc_host()
+{
+	ccenv_attr_prolog 'system'
+	ccenv_cc_host="$ccenv_cchost"
+	ccenv_attr_epilog "$ccenv_cc_host"
+}
+
+ccenv_set_cc_bits()
+{
+	ccenv_attr_prolog 'bits'
+
+	ccenv_internal_size=
+	ccenv_internal_type='void *'
+	ccenv_internal_test='char x[(sizeof(%s) == %s/8) ? 1 : -1];'
+
+	for ccenv_internal_guess in 64 32 128; do
+		if [ -z "${ccenv_internal_size:-}" ]; then
+			ccenv_internal_str=$(printf "$ccenv_internal_test"  \
+				"$ccenv_internal_type"                      \
+				"$ccenv_internal_guess")
+
+			printf '%s' "$ccenv_internal_str"                   \
+					| eval $ccenv_cc -S -xc - -o -      \
+					  $(printf '%s' "$ccenv_cflags")    \
+				> /dev/null 2>&3                            \
+			&& ccenv_internal_size=$ccenv_internal_guess
+		fi
+	done
+
+	ccenv_cc_bits=$ccenv_internal_size
+
+	ccenv_attr_epilog "$ccenv_cc_bits"
+}
+
+ccenv_set_cc_underscore()
+{
+	ccenv_attr_prolog 'prepended underscores'
+
+	ccenv_fn_name='ZmYaXyWbVe_UuTnSdReQrPsOcNoNrLe'
+	ccenv_fn_code='int %s(void){return 0;}'
+
+	if printf "$ccenv_fn_code" $ccenv_fn_name  \
+			| $ccenv_cc -xc - -S -o -  \
+			| grep "^_$ccenv_fn_name:" \
+				> /dev/null; then
+		ccenv_cc_underscore='_'
+		ccenv_attr_epilog 'yes'
+	fi
+
+	ccenv_attr_epilog 'no'
+
+	return 0
+}
+
+ccenv_create_framework_executable()
+{
+	if [ -f $ccenv_image ]; then
+		mv $ccenv_image $ccenv_image.tmp
+		rm -f $ccenv_image.tmp
+	fi
+
+	printf 'int main(void){return 0;}'  \
+		| $ccenv_cc -xc -           \
+			-o $ccenv_image     \
+			2>/dev/null         \
+	|| return 1
+
+	return 0
+}
+
+ccenv_create_freestanding_executable()
+{
+	if [ -f $ccenv_image ]; then
+		mv $ccenv_image $ccenv_image.tmp
+		rm -f $ccenv_image.tmp
+	fi
+
+	if [ -z "ccenv_cc_underscore" ]; then
+		ccenv_start_fn='_start'
+	else
+		ccenv_start_fn='start'
+	fi
+
+	printf 'int %s(void){return 0;}' "$ccenv_start_fn"  \
+		| $ccenv_cc -xc -                           \
+			-ffreestanding                      \
+			-nostdlib -nostartfiles             \
+			-o $ccenv_image                     \
+	|| return 1
+
+	ccenv_freestd=yes
+
+	return 0
+}
+
+ccenv_set_cc_binfmt_error()
+{
+	ccenv_attr_epilog '(unable to create executable)'
+}
+
+ccenv_set_cc_binfmt()
+{
+	ccenv_use_perk=
+	ccenv_use_otool=
+	ccenv_use_readelf=
+	ccenv_use_readobj=
+	ccenv_use_bfd_objdump=
+	ccenv_use_llvm_objdump=
+
+	ccenv_attr_prolog 'binary format'
+
+	ccenv_create_framework_executable               \
+		|| ccenv_create_freestanding_executable \
+		|| ccenv_set_cc_binfmt_error            \
+		|| return 0
+
+	# PE / perk
+	if [ -n "$ccenv_perk" ]; then
+		if $ccenv_perk $ccenv_image 2>&3; then
+			ccenv_cc_binfmt='PE'
+			ccenv_use_perk=yes
+		fi
+	fi
+
+	# ELF / readelf
+	if [ -n "$ccenv_readelf" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		if $ccenv_readelf -h $ccenv_image 2>&3               \
+				| grep 'Magic:' | sed -e 's/[ ]*//g' \
+				| grep 'Magic:7f454c46'              \
+					> /dev/null; then
+			ccenv_cc_binfmt='ELF'
+			ccenv_use_readelf=yes
+		fi
+	fi
+
+	# a marble of astonishing design:
+	# llvm-readelf also parses PE and Mach-O
+
+	if [ -n "$ccenv_readelf_llvm" ]; then
+		ccenv_readany="$ccenv_readelf_llvm"
+	else
+		ccenv_readany="$ccenv_readelf"
+	fi
+
+	# PE / readelf
+	if [ -n "$ccenv_readany" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		if $ccenv_readany -h $ccenv_image 2>&3               \
+				| grep 'Magic:' | sed -e 's/[ ]*//g' \
+				| grep 'Magic:MZ'                    \
+					> /dev/null; then
+			ccenv_cc_binfmt='PE'
+			ccenv_use_readelf=yes
+		fi
+	fi
+
+	# MACHO-64 / otool
+	if [ -n "$ccenv_otool" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		if $ccenv_otool -hv $ccenv_image 2>&3        \
+				| grep -i 'MH_MAGIC_64'      \
+					> /dev/null; then
+			ccenv_cc_binfmt='MACHO'
+			ccenv_use_otool=yes
+		fi
+	fi
+
+	# MACHO-32 / otool
+	if [ -n "$ccenv_otool" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		if $ccenv_otool -hv $ccenv_image 2>&3        \
+				| grep -i 'MH_MAGIC'         \
+					> /dev/null; then
+			ccenv_cc_binfmt='MACHO'
+			ccenv_use_otool=yes
+		fi
+	fi
+
+	# MACHO-64 / readelf
+	if [ -n "$ccenv_readany" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		if $ccenv_readany -h $ccenv_image 2>&3                    \
+				| grep -i 'Magic:' | sed -e 's/[ ]*//g'   \
+				| grep -i '(0xfeedfacf)'                  \
+					> /dev/null; then
+			ccenv_cc_binfmt='MACHO'
+			ccenv_use_readelf=yes
+		fi
+	fi
+
+	# MACHO-32 / readelf
+	if [ -n "$ccenv_readany" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		if $ccenv_readany -h $ccenv_image 2>&3                    \
+				| grep -i 'Magic:' | sed -e 's/[ ]*//g'   \
+				| grep -i '(0xcafebabe)'                  \
+					> /dev/null; then
+			ccenv_cc_binfmt='MACHO'
+			ccenv_use_readelf=yes
+		fi
+	fi
+
+	# MACHO / readobj
+	if [ -n "$ccenv_readobj" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		if $ccenv_readobj $ccenv_image 2>&3                  \
+				| grep -i 'Format:'                  \
+				| sed  -e 's/ /_/g'                  \
+				| grep -i '_Mach-O_'                 \
+					> /dev/null; then
+			ccenv_cc_binfmt='MACHO'
+			ccenv_use_readobj=yes
+		fi
+	fi
+
+	# MACHO / objdump (llvm)
+	if [ -n "$ccenv_objdump" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		if $ccenv_objdump -section-headers $ccenv_image  \
+					2>&3                     \
+				| grep -i 'file format Mach-O'   \
+					> /dev/null; then
+			ccenv_cc_binfmt='MACHO'
+			ccenv_use_objdump=yes
+		fi
+	fi
+
+	# MACHO / objdump (bfd)
+	if [ -n "$ccenv_objdump" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		$ccenv_objdump -h  $ccenv_image 2>&3              \
+			| grep -i 'file format Mach-O'            \
+				> /dev/null                       \
+		&& ccenv_cc_binfmt='MACHO'                        \
+		&& ccenv_use_objdump=yes
+	fi
+
+	# PE / objdump (bfd)
+	if [ -n "$ccenv_objdump" ] && [ -z "$ccenv_cc_binfmt" ]; then
+		if $ccenv_objdump -h  $ccenv_image 2>&3        \
+				| grep -i 'file format pei-'   \
+					> /dev/null; then
+			ccenv_cc_binfmt='PE'
+			ccenv_use_bfd_objdump=yes
+		fi
+	fi
+
+	ccenv_attr_epilog "$ccenv_cc_binfmt"
+}
+
+ccenv_set_os_pe()
+{
+	if [ -n "$ccenv_freestd" ]; then
+		case "$ccenv_cchost" in
+			*-midipix | *-midipix-* )
+				ccenv_os='midipix' ;;
+			*-mingw | *-mingw32 | *-mingw64 )
+				ccenv_os='mingw' ;;
+			*-mingw-* | *-mingw32-* | *-mingw64 )
+				ccenv_os='mingw' ;;
+			*-msys | *-msys2 | *-msys-* | *-msys2-* )
+				ccenv_os='msys' ;;
+			*-cygwin | *-cygwin-* )
+				ccenv_os='cygwin' ;;
+		esac
+	fi
+
+	if [ -n "$ccenv_os" ]; then
+		return 0
+	fi
+
+	if [ -n "$ccenv_use_perk" ]; then
+		ccenv_framework=$($ccenv_perk -y $ccenv_image)
+		ccenv_os=${ccenv_framework#*-*-*-*}
+	fi
+
+	if [ -z "$ccenv_os" ] && [ -n "$ccenv_objdump_bfd" ]; then
+		$ccenv_objdump_bfd -x $ccenv_image | grep -i 'DLL Name' \
+			| grep 'cygwin1.dll' > /dev/null                \
+		&& ccenv_os='cygwin'
+	fi
+
+	if [ -z "$ccenv_os" ] && [ -n "$ccenv_objdump_bfd" ]; then
+		$ccenv_objdump_bfd -x $ccenv_image | grep -i 'DLL Name' \
+			| grep 'msys-2.0.dll' > /dev/null               \
+		&& ccenv_os='msys'
+	fi
+
+	if [ -z "$ccenv_os" ] && [ -n "$ccenv_objdump_bfd" ]; then
+		$ccenv_objdump_bfd -x $ccenv_image          \
+			| grep -i 'DLL Name' | grep '.CRT'  \
+				> /dev/null                 \
+		&& $ccenv_objdump_bfd -x $ccenv_image       \
+			| grep -i 'DLL Name' | grep '.bss'  \
+				> /dev/null                 \
+		&& $ccenv_objdump_bfd -x $ccenv_image       \
+			| grep -i 'DLL Name' | grep '.tls'  \
+				> /dev/null                 \
+		&& ccenv_os='mingw'
+	fi
+}
+
+ccenv_set_os_macho()
+{
+	case "$ccenv_cchost" in
+		*-apple-darwin* )
+			ccenv_os='darwin' ;;
+	esac
+}
+
+ccenv_set_os()
+{
+	ccenv_attr_prolog 'os name'
+
+	case "$ccenv_cc_binfmt" in
+		PE )
+			ccenv_set_os_pe ;;
+		MACHO )
+			ccenv_set_os_macho ;;
+	esac
+
+	if [ -n "$ccenv_os" ]; then
+		ccenv_attr_epilog "$ccenv_os"
+		return 0
+	fi
+
+	case "$ccenv_cchost" in
+		*-*-*-* )
+			ccenv_tip=${ccenv_cchost%-*}
+			ccenv_os=${ccenv_tip#*-*-}
+			;;
+		*-*-musl | *-*-gnu )
+			ccenv_tip=${ccenv_cchost%-*}
+			ccenv_os=${ccenv_tip#*-}
+			;;
+		*-*-* )
+			ccenv_os=${ccenv_cchost#*-*-}
+			;;
+		*-* )
+			ccenv_os=${ccenv_cchost#*-}
+			;;
+	esac
+
+	if [ -z "$ccenv_os" ]; then
+		ccenv_os='anyos'
+	fi
+
+	ccenv_attr_epilog "$ccenv_os"
+}
+
+ccenv_set_os_flags()
+{
+	case "$ccenv_os" in
+		darwin )
+			ccenv_cflags_os='-D_DARWIN_C_SOURCE'
+			ccenv_cflags_pic='-fPIC'
+			;;
+		midipix )
+			ccenv_cflags_os=
+			ccenv_cflags_pic='-fPIC'
+			;;
+		cygwin )
+			ccenv_cflags_os=
+			ccenv_cflags_pic=
+			;;
+		msys | msys* | mingw | mingw* )
+			ccenv_cflags_os='-U__STRICT_ANSI__'
+			ccenv_cflags_pic=
+			;;
+		* )
+			ccenv_cflags_os=
+			ccenv_cflags_pic='-fPIC'
+			;;
+	esac
+}
+
+ccenv_set_os_semantics()
+{
+	# binary_format - core_api - ex_api - dependency_resolution
+
+	ccenv_attr_prolog 'os semantics'
+
+	case "$ccenv_os" in
+		linux )
+			ccenv_os_semantics='elf-posix-linux-ldso'
+			;;
+		bsd )
+			ccenv_os_semantics='elf-posix-bsd-ldso'
+			;;
+		darwin )
+			ccenv_os_semantics='macho-posix-osx-ldso'
+			;;
+		midipix )
+			ccenv_os_semantics='pe-posix-winnt-ldso'
+			;;
+		cygwin )
+			ccenv_os_semantics='pe-hybrid-winnt-unsafe'
+			;;
+		msys )
+			ccenv_os_semantics='pe-hybrid-winnt-unsafe'
+			;;
+		mingw )
+			ccenv_os_semantics='pe-win32-winnt-unsafe'
+			;;
+	esac
+
+	if [ -n "$ccenv_os_semantics" ]; then
+		ccenv_attr_epilog "$ccenv_os_semantics"
+		return 0
+	fi
+
+	if [ -n "$ccenv_cc_binfmt" ]; then
+		ccenv_os_semantics_pattern='%s-posix-anyos-unknown'
+		ccenv_os_semantics=$(printf                   \
+				"$ccenv_os_semantics_pattern"  \
+				"$ccenv_cc_binfmt"              \
+			| tr '[:upper:]' '[:lower:]')
+	else
+		ccenv_os_semantics='unknown-posix-anyos-unknown'
+	fi
+
+	ccenv_attr_epilog "$ccenv_os_semantics"
+}
+
+ccenv_set_os_dso_format()
+{
+	ccenv_attr_prolog 'os dso format'
+
+	case "$ccenv_cc_arfmt" in
+		common )
+			ccenv_cc_sofmt="$ccenv_cc_binfmt"
+			;;
+
+		bigaf )
+			ccenv_libgcc_s_a_header=$(od -b -N8             \
+				$($ccenv_cc -print-file-name=libgcc_s.a) \
+					2>/dev/null                       \
+					| head -n1)
+
+			ccenv_libgcc_s_so_header=$(od -b -N8             \
+				$($ccenv_cc -print-file-name=libgcc_s.so) \
+					2>/dev/null                        \
+					| head -n1)
+
+			if [ "$ccenv_libgcc_s_a_header" = "$ccenv_bigaf_header" ]; then
+				ccenv_cc_sofmt='bigaf'
+			elif [ "$ccenv_libgcc_s_so_header" = "$ccenv_bigaf_header" ]; then
+				ccenv_cc_sofmt='bigaf'
+			else
+				ccenv_cc_sofmt="$ccenv_cc_binfmt"
+			fi
+			;;
+
+		aiaff )
+			ccenv_libgcc_s_a_header=$(od -b -N8               \
+				$($ccenv_cc -print-file-name=libgcc_s.a) \
+					| head -n1)
+
+			ccenv_libgcc_s_so_header=$(od -b -N8               \
+				$($ccenv_cc -print-file-name=libgcc_s.so) \
+					| head -n1)
+
+			if [ "$ccenv_libgcc_s_a_header" = "$ccenv_aiaff_header" ]; then
+				ccenv_cc_sofmt='aiaff'
+			elif [ "$ccenv_libgcc_s_so_header" = "$ccenv_aiaff_header" ]; then
+				ccenv_cc_sofmt='aiaff'
+			else
+				ccenv_cc_sofmt="$ccenv_cc_binfmt"
+			fi
+			;;
+	esac
+
+	if [ "$ccenv_cfgtype" = 'host' ]; then
+		case "$ccenv_cc_sofmt" in
+			bigaf | aiaff )
+				mb_shared_lib_cmd='$(AR) -rcs'
+				mb_shared_lib_ldflags=
+				;;
+
+			* )
+				mb_shared_lib_cmd='$(CC) -shared -o'
+				mb_shared_lib_ldflags='$(LDFLAGS_SHARED)'
+				;;
+		esac
+	fi
+
+	ccenv_attr_epilog "$ccenv_cc_sofmt"
+}
+
+ccenv_set_os_dso_exrules()
+{
+	ccenv_attr_prolog 'os dso exrules'
+
+	case "$ccenv_os" in
+		midipix )
+			ccenv_os_dso_exrules='pe-mdso'
+			;;
+		* )
+			if [ "$ccenv_cc_binfmt" = 'PE' ]; then
+				ccenv_os_dso_exrules='pe-dlltool'
+			else
+				ccenv_os_dso_exrules='default'
+			fi
+	esac
+
+	ccenv_attr_epilog "$ccenv_os_dso_exrules"
+}
+
+ccenv_set_os_dso_linkage()
+{
+	# todo: PIC, PIE, and friends
+	ccenv_attr_prolog 'os linkage'
+	ccenv_os_dso_linkage='default'
+	ccenv_attr_epilog "$ccenv_os_dso_linkage"
+}
+
+ccenv_set_os_dso_patterns_darwin()
+{
+	ccenv_os_app_prefix=
+	ccenv_os_app_suffix=
+
+	ccenv_os_lib_prefix=lib
+	ccenv_os_lib_suffix=.dylib
+
+	ccenv_os_implib_ext=.invalid
+	ccenv_os_libdef_ext=.invalid
+
+	ccenv_os_archive_ext=.a
+	ccenv_os_soname=symlink
+
+	ccenv_os_lib_prefixed_suffix=
+	ccenv_os_lib_suffixed_suffix='$(OS_LIB_SUFFIX)'
+}
+
+ccenv_set_os_dso_patterns_mdso()
+{
+	ccenv_os_app_prefix=
+	ccenv_os_app_suffix=
+
+	ccenv_os_lib_prefix=lib
+	ccenv_os_lib_suffix=.so
+
+	ccenv_os_implib_ext=.lib.a
+	ccenv_os_libdef_ext=.so.def
+
+	ccenv_os_archive_ext=.a
+	ccenv_os_soname=symlink
+
+	ccenv_os_lib_prefixed_suffix='$(OS_LIB_SUFFIX)'
+	ccenv_os_lib_suffixed_suffix=
+}
+
+ccenv_set_os_dso_patterns_dlltool()
+{
+	ccenv_os_app_prefix=
+	ccenv_os_app_suffix=.exe
+
+	ccenv_os_lib_prefix=lib
+	ccenv_os_lib_suffix=.dll
+
+	ccenv_os_implib_ext=.dll.a
+	ccenv_os_libdef_ext=.def
+
+	ccenv_os_archive_ext=.a
+	ccenv_os_soname=copy
+
+	ccenv_os_lib_prefixed_suffix='$(OS_LIB_SUFFIX)'
+	ccenv_os_lib_suffixed_suffix=
+}
+
+ccenv_set_os_dso_patterns_default()
+{
+	ccenv_os_app_prefix=
+	ccenv_os_app_suffix=
+
+	ccenv_os_lib_prefix=lib
+	ccenv_os_lib_suffix=.so
+
+	ccenv_os_implib_ext=.invalid
+	ccenv_os_libdef_ext=.invalid
+
+	ccenv_os_archive_ext=.a
+	ccenv_os_soname=symlink
+
+	ccenv_os_lib_prefixed_suffix='$(OS_LIB_SUFFIX)'
+	ccenv_os_lib_suffixed_suffix=
+}
+
+ccenv_set_os_dso_patterns()
+{
+	# sover: .so.x.y.z
+	# verso: .x.y.z.so
+
+	case "$ccenv_os" in
+		darwin )
+			ccenv_set_os_dso_patterns_darwin
+			;;
+		midipix )
+			ccenv_set_os_dso_patterns_mdso
+			;;
+		cygwin | msys | mingw )
+			ccenv_set_os_dso_patterns_dlltool
+			;;
+		* )
+			ccenv_set_os_dso_patterns_default
+			;;
+	esac
+}
+
+ccenv_set_os_pe_switches()
+{
+	if [ "$ccenv_cc_binfmt" = 'PE' ] && [ -z "$ccenv_pe_subsystem" ]; then
+		case "$ccenv_os" in
+			midipix | mingw )
+				ccenv_pe_subsystem='windows'
+				;;
+			* )
+				ccenv_pe_subsystem='console'
+				;;
+		esac
+	fi
+}
+
+ccenv_output_defs()
+{
+	ccenv_in="$mb_project_dir/sofort/ccenv/ccenv.in"
+	ccenv_mk="$mb_pwd/ccenv/$ccenv_cfgtype.mk"
+	ccenv_tmp=
+
+	if [ "$ccenv_cc_binfmt" = 'PE' ]; then
+		ccenv_pe="$mb_project_dir/sofort/ccenv/pedefs.in"
+		ccenv_in="$ccenv_in $ccenv_pe"
+	fi
+
+	if [ $ccenv_cfgtype = 'native' ]; then
+
+		ccenv_tmp=$(mktemp ./tmp_XXXXXXXXXXXXXXXX)
+
+		sed                                      \
+				-e 's/^[[:space:]]*$/@/g' \
+				-e 's/^/NATIVE_/'          \
+				-e 's/NATIVE_@//g'          \
+				-e 's/NATIVE_#/#/g'          \
+				-e 's/       =/=/g'           \
+				-e 's/       +=/+=/g'          \
+			$(printf '%s ' $ccenv_in)               \
+				> "$ccenv_tmp"
+
+		ccenv_in="$ccenv_tmp"
+	else
+		unset ccenv_tmp
+	fi
+
+	ccenv_var_defs=
+	ccenv_sed_substs=
+
+	ccenv_vars=$(cut -d'=' -f1 "$mb_project_dir/sofort/ccenv/ccenv.vars" \
+		| grep -v '^#');
+
+	ccenv_exvars="ccenv_cfgtype ccenv_makevar_prefix"
+
+	for __var in $(printf '%s' "$ccenv_vars $ccenv_exvars"); do
+		ccenv_sed_subst=$(printf '%s %s%s%s' \
+				'-e' "'s^@$__var@"    \
+				"^___${__var}___"      \
+				"^g'")
+
+		ccenv_sed_substs="$ccenv_sed_substs $ccenv_sed_subst"
+
+		ccenv_var_def=$(printf '%s%s="${%s}"' "-D" "___${__var}___" "${__var}")
+		eval ccenv_var_defs='"$ccenv_var_defs "$ccenv_var_def'
+	done
+
+	eval sed $ccenv_sed_substs $(printf '%s ' $ccenv_in) \
+			| eval m4 $ccenv_var_defs -           \
+			| sed -e 's/[[:blank:]]*$//g'          \
+		> "$ccenv_mk"
+
+	if [ "$ccenv_cfgtype" = 'host' ]; then
+		for __var in $(printf '%s' "$ccenv_vars"); do
+			ccenv_src_var=$__var
+			ccenv_dst_var=mb_${__var#*ccenv_}
+			ccenv_var_expr='${'$ccenv_src_var':-}'
+			eval $ccenv_dst_var=$ccenv_var_expr
+
+		done
+
+		mb_host=$ccenv_host
+		mb_cchost=$ccenv_cchost
+	else
+		for __var in $(printf '%s' "$ccenv_vars"); do
+			ccenv_src_var=$__var
+			ccenv_dst_var=mb_native_${__var#*ccenv_}
+			ccenv_var_expr='${'$ccenv_src_var':-}'
+			eval "$ccenv_dst_var=$ccenv_var_expr"
+		done
+
+		mb_native_host=$ccenv_host
+		mb_native_cchost=$ccenv_cchost
+	fi
+
+	if [ -n "${ccenv_tmp:-}" ]; then
+		rm -f "$ccenv_tmp"
+		unset ccenv_tmp
+	fi
+}
+
+ccenv_dso_verify()
+{
+	ccenv_str='int foo(int x){return ++x;}'
+	ccenv_cmd="$ccenv_cc -xc - -shared -o a.out"
+
+	rm -f a.out
+
+	printf '%s' "$ccenv_str" | $(printf %s "$ccenv_cmd") \
+		> /dev/null 2>&3              \
+	|| mb_disable_shared=yes
+
+	rm -f a.out
+}
+
+ccenv_clean_up()
+{
+	rm -f $ccenv_image
+}
+
+ccenv_common_init()
+{
+	. "$mb_project_dir/sofort/ccenv/ccenv.vars"
+
+	ccenv_cfgtype=$1
+	ccenv_cfgfile="$mb_pwd/ccenv/$ccenv_cfgtype.mk"
+	ccenv_freestd=
+	ccenv_cchost=
+
+	if [ $ccenv_cfgtype = 'native' ]; then
+		ccenv_makevar_prefix='NATIVE_'
+		ccenv_image='./ccenv/native.a.out'
+	else
+		ccenv_makevar_prefix=
+		ccenv_image='./ccenv/host.a.out'
+	fi
+
+	if [ $ccenv_cfgtype = 'native' ]; then
+		ccenv_prefixes=
+	elif [ -n "$mb_cross_compile" ]; then
+		ccenv_prefixes="$mb_cross_compile"
+	elif [ -n "$mb_host" ]; then
+		ccenv_prefixes="$mb_host-"
+	else
+		ccenv_prefixes=
+	fi
+
+	if [ $ccenv_cfgtype = 'host' ]; then
+		ccenv_tflags=
+		ccenv_cflags=$(${mb_make} -n -f "$mb_pwd/Makefile.tmp" \
+			OS_DSO_EXRULES=default                          \
+			OS_SONAME=symlink                                \
+			OS_ARCHIVE_EXT='.a'                               \
+			.cflags-host)
+
+		ccenv_cflags="${ccenv_cflags#*: }"
+
+		ccenv_cc="$mb_user_cc"
+		ccenv_cpp="$mb_user_cpp"
+		ccenv_cxx="$mb_user_cxx"
+
+		ccenv_pe_subsystem="$mb_pe_subsystem"
+		ccenv_pe_image_base="$mb_pe_image_base"
+	else
+		ccenv_tflags=
+		ccenv_cflags=$(${mb_make} -n -f "$mb_pwd/Makefile.tmp" \
+			OS_DSO_EXRULES=default                          \
+			OS_SONAME=symlink                                \
+			OS_ARCHIVE_EXT='.a'                               \
+			.cflags-native)
+
+		ccenv_cflags="${ccenv_cflags#*: }"
+
+		ccenv_cc="$mb_native_cc"
+		ccenv_cpp="$mb_native_cpp"
+		ccenv_cxx="$mb_native_cxx"
+
+		ccenv_pe_subsystem="$mb_native_pe_subsystem"
+		ccenv_pe_image_base="$mb_native_pe_image_base"
+	fi
+}
+
+ccenv_set_characteristics()
+{
+	ccenv_set_cc_host
+	ccenv_set_cc_bits
+	ccenv_set_cc_binfmt
+	ccenv_set_cc_underscore
+}
+
+ccenv_set_toolchain_variables()
+{
+	ccenv_common_init $1
+	ccenv_set_cc
+	ccenv_set_cpp
+	ccenv_set_cxx
+	ccenv_set_primary_tools
+	ccenv_set_tool_variants
+	ccenv_set_characteristics
+
+	ccenv_set_os
+	ccenv_set_os_flags
+	ccenv_set_os_semantics
+	ccenv_set_os_dso_format
+	ccenv_set_os_dso_exrules
+	ccenv_set_os_dso_linkage
+	ccenv_set_os_dso_patterns
+	ccenv_set_os_pe_switches
+
+	ccenv_output_defs
+	ccenv_clean_up
+
+	eval 'ccenv_'${ccenv_cfgtype}'_cc'=\'$ccenv_cc\'
+}
+
+ccenv_set_host_variables()
+{
+	output_script_status ${mb_script} \
+		'detect and query host (targeted) system'
+
+	ccenv_set_toolchain_variables 'host'
+	ccenv_dso_verify
+}
+
+ccenv_set_native_variables()
+{
+	output_script_status ${mb_script} \
+		'detect and query native (local build) system'
+
+	if [ _$mb_ccenv_skip_native != _yes ]; then
+		ccenv_set_toolchain_variables 'native'
+	fi
+}
diff --git a/sofort/ccenv/ccenv.usage b/sofort/ccenv/ccenv.usage
new file mode 100644
index 0000000..8eab780
--- /dev/null
+++ b/sofort/ccenv/ccenv.usage
@@ -0,0 +1,78 @@
+A few words on sofort's tool-finding logic
+==========================================
+
+# the goals of sofort's tool-finding logic are:
+- follow a clear, transparent, and consistent logic
+- allow users to easily specify per-build preferences
+- allow distros to easily and cleanly use site-wide settings
+
+
+# three-way terminology:
+- native machine: where make(1) will be running.
+- host machine:   where the package's program or libraries will execute.
+- target machine: where code generated by the host package will execute.
+
+! NOTE, however, that the host/target distinction is only relevant
+  when building a code-generating utility (e.g. a compiler), and that
+  the two are otherwise rather synonymous. Moreover, in practice it
+  is much more common to see configure scripts being invoked with a
+  --target=<machine> argument specifying the host, than with a
+  --host=<machine> argument.
+
+
+# invocation and names of binary tools:
+- agnostic names (ar, nm, objdump, ...)
+- branded names (llvm-ar, llvm-nm, llvm-objdump, ...)
+- machine-prefixed agnostic names (x86_64-nt64-midipix-ar, ...)
+- machine-prefixed branded names (x86_64-linux-gnu-gcc-ar, ...)
+- machine-specifying branded tools, as in
+  llvm-ar --target=x86_64-linux.
+
+
+# cross-compilation: default search order:
+- machine-prefixed agnostic tools
+- machine-prefixed branded tools, starting with the prefix
+  most commonly associated with the selected compiler (that is,
+  ``gcc'' when using gcc, and ``llvm'' when using clang)
+- (machine-specifying) agnostic tools
+- (machine-speficying) branded tools, starting once again with the
+  prefix most commonly associated with the selected compiler
+
+
+# native builds: default search order:
+- agnostic tools
+- machine-prefixed agnostic tools
+- machine-prefixed branded tools
+- branded tools
+
+
+# using an alternate search order:
+- --toolchain=<prefix> (e.g. --toolchain=llvm) --> search for tools
+  that begin with <prefix> before searching for agnostic tools
+
+
+# restricting which tools may be searched:
+- --zealous          --> only search for agnostic tools
+- --zealous=<prefix> --> only search for <prefix>-branded tools
+
+
+# per-tool overrides, by example of the ``ar'' tool:
+- AR=ar          --> set AR to $(command -v ar)
+- AR=/path/to/ar --> set AR to the specified absolute path
+
+
+# host generated config file and variable names:
+- ccenv/host.mk
+- AR, NM, OBJDUMP, ...
+
+
+# native generated config file and variable names:
+- ccenv/native.mk
+- NATIVE_AR, NATIVE_NM, NATIVE_OBJDUMP, ...
+
+
+# distro: site-wide preferences
+- --ccenv=/path/to/site-specific/ccenv
+- use the above to create ccenv as a symlink to
+  /path/to/site-specific/ccenv, and to accordingly
+  skip configure's tool-finding step.
diff --git a/sofort/ccenv/ccenv.vars b/sofort/ccenv/ccenv.vars
new file mode 100644
index 0000000..07552af
--- /dev/null
+++ b/sofort/ccenv/ccenv.vars
@@ -0,0 +1,88 @@
+# system flavor
+ccenv_os=
+ccenv_os_semantics=
+
+ccenv_os_dso_exrules=
+ccenv_os_dso_linkage=
+
+ccenv_os_app_prefix=
+ccenv_os_app_suffix=
+
+ccenv_os_lib_prefix=
+ccenv_os_lib_suffix=
+
+ccenv_os_implib_ext=
+ccenv_os_libdef_ext=
+
+ccenv_os_archive_ext=
+ccenv_os_soname=
+
+ccenv_os_lib_prefixed_suffix=
+ccenv_os_lib_suffixed_suffix=
+
+# characteristics
+ccenv_cc_host=
+ccenv_cc_bits=
+
+ccenv_cc_arfmt=
+ccenv_cc_sofmt=
+ccenv_cc_binfmt=
+ccenv_cc_underscore=
+
+ccenv_cc_arch_bfd=
+ccenv_cc_arch_llvm=
+
+# incompatible tool variants
+ccenv_as_asm=
+ccenv_as_ll=
+ccenv_as_mc=
+
+ccenv_ld_bfd=
+ccenv_ld_gold=
+ccenv_ld_lld=
+
+ccenv_objdump_bfd=
+ccenv_objdump_llvm=
+
+ccenv_readelf_bfd=
+ccenv_readelf_llvm=
+
+# tool variables
+ccenv_cc=
+ccenv_cpp=
+ccenv_cxx=
+
+ccenv_as=
+ccenv_ld=
+
+ccenv_ar=
+ccenv_nm=
+ccenv_objdump=
+ccenv_ranlib=
+ccenv_size=
+ccenv_strip=
+ccenv_strings=
+
+ccenv_addr2line=
+ccenv_cov=
+ccenv_cxxfilt=
+ccenv_objcopy=
+
+ccenv_elfedit=
+ccenv_readelf=
+ccenv_readobj=
+
+ccenv_perk=
+ccenv_mdso=
+ccenv_dlltool=
+
+ccenv_windmc=
+ccenv_windrc=
+
+# cflags
+ccenv_cflags_os=
+ccenv_cflags_pic=
+
+# pe
+ccenv_pe_subsystem=
+ccenv_pe_image_base=
diff --git a/sofort/ccenv/pedefs.in b/sofort/ccenv/pedefs.in
new file mode 100644
index 0000000..300d990
--- /dev/null
+++ b/sofort/ccenv/pedefs.in
@@ -0,0 +1,4 @@
+# @ccenv_cfgtype@ pe switches
+PE_SUBSYSTEM                    = @ccenv_pe_subsystem@
+PE_IMAGE_BASE                   = @ccenv_pe_image_base@
+
diff --git a/sofort/cfgtest/cfgtest.sh b/sofort/cfgtest/cfgtest.sh
new file mode 100644
index 0000000..9c13b67
--- /dev/null
+++ b/sofort/cfgtest/cfgtest.sh
@@ -0,0 +1,564 @@
+# cfgtest.sh: sofort's config test framework,
+# for use from within a project's custom cfgdefs.sh.
+
+# this file is covered by COPYING.SOFORT.
+
+# in the common scenario, host-specific tests are preceded
+# by a single invocation of cfgtest_host_section, whereas
+# native (build) system tests are preceded by the invocation
+# of cfgtest_native_section.
+
+# cfgdefs fraework variables:
+# mb_cfgtest_cc:      the compiler used for the current test
+# mb_cfgtest_cflags:  the compiler flags used for the current test
+# mb_cfgtest_cfgtype: the type of the current test (host/native)
+# mb_cfgtest_makevar: the make variable affected by the current test
+# mb_cfgtest_headers: headers for ad-hoc inclusion with the current test
+
+
+cfgtest_newline()
+{
+	printf '\n' >> $mb_pwd/cfgdefs.mk
+}
+
+
+cfgtest_comment()
+{
+	mb_internal_str='#'
+
+	for mb_internal_arg ; do
+		mb_internal_str="$mb_internal_str $mb_internal_arg"
+	done
+
+	printf '%s\n' "$mb_internal_str" >> $mb_pwd/cfgdefs.mk
+}
+
+
+cfgtest_host_section()
+{
+	mb_cfgtest_cc="$ccenv_host_cc"
+	mb_cfgtest_cfgtype='host'
+	mb_cfgtest_cflags=$(${mb_make} -n -f "$mb_pwd/Makefile.tmp" .cflags-host)
+	mb_cfgtest_cflags="${mb_cfgtest_cflags#*: }"
+
+	mb_cfgtest_ldflags="$mb_ldflags_cmdline"
+	mb_cfgtest_ldflags="$mb_cfgtest_ldflags $mb_ldflags_debug"
+	mb_cfgtest_ldflags="$mb_cfgtest_ldflags $mb_ldflags_common"
+	mb_cfgtest_ldflags="$mb_cfgtest_ldflags $mb_ldflags_strict"
+	mb_cfgtest_ldflags="$mb_cfgtest_ldflags $mb_ldflags_config"
+	mb_cfgtest_ldflags="$mb_cfgtest_ldflags $mb_ldflags_sysroot"
+	mb_cfgtest_ldflags="$mb_cfgtest_ldflags $mb_ldflags_path"
+	mb_cfgtest_ldflags="$mb_cfgtest_ldflags $mb_ldflags_last"
+
+	cfgtest_comment 'host-specific tests'
+}
+
+
+cfgtest_native_section()
+{
+	mb_cfgtest_cc="$mb_native_cc"
+	mb_cfgtest_cfgtype='native'
+	mb_cfgtest_cflags=$(${mb_make} -n -f "$mb_pwd/Makefile.tmp" .cflags-native)
+	mb_cfgtest_cflags="${mb_cfgtest_cflags#*: }"
+	mb_cfgtest_ldflags="$mb_native_ldflags"
+
+	cfgtest_comment 'native system tests'
+}
+
+
+cfgtest_prolog()
+{
+	cfgtest_line_dots='.......................'
+	cfgtest_line_dots="${cfgtest_line_dots}${cfgtest_line_dots}"
+	cfgtest_tool_desc=" == trying ${mb_cfgtest_cfgtype} ${1}: ${2}"
+	cfgtest_tool_dlen="${#cfgtest_line_dots}"
+
+	printf '\n%s\n' '________________________' >&3
+	printf "cfgtest: probing for ${mb_cfgtest_cfgtype} ${1}: ${2}\n\n" >&3
+	printf "%${cfgtest_tool_dlen}.${cfgtest_tool_dlen}s" \
+		"${cfgtest_tool_desc}  ${mb_line_dots}"
+}
+
+
+cfgtest_epilog()
+{
+	cfgtest_line_dots='.......................'
+	cfgtest_tool_dlen="$((${#cfgtest_line_dots} - ${#2}))"
+
+	printf "%${cfgtest_tool_dlen}.${cfgtest_tool_dlen}s  %s.\n" \
+		"${cfgtest_line_dots}" "${2}"
+
+	if [ "${2}" = '-----' ]; then
+		printf '\n\ncfgtest: %s is missing or cannot be found.\n' "${1}" >&3
+		printf '%s\n' '------------------------' >&3
+		return 1
+	elif [ "${1}" = 'size-of-type' ] && [ "${2}" = '(error)' ]; then
+		printf '\n\ncfgtest: could not determine size of type.\n' >&3
+		printf '%s\n' '------------------------' >&3
+		return 1
+	elif [ "${2}" = '(error)' ]; then
+		printf '\n\ncfgtest: %s is not defined or cannot be used.\n' "${1}" >&3
+		printf '%s\n' '------------------------' >&3
+		return 1
+	fi
+}
+
+
+cfgtest_entity_size_prolog()
+{
+	cfgtest_line_dots='.......................'
+	cfgtest_line_dots="${cfgtest_line_dots}${cfgtest_line_dots}"
+	cfgtest_tool_desc=" == checking size of ${mb_cfgtest_cfgtype} type: ${@}"
+	cfgtest_tool_dlen="${#cfgtest_line_dots}"
+
+	printf '\n%s\n' '________________________' >&3
+	printf "cfgtest: checking size of ${mb_cfgtest_cfgtype} type: ${@}\n\n" >&3
+
+	printf "%${cfgtest_tool_dlen}.${cfgtest_tool_dlen}s" \
+		"${cfgtest_tool_desc}  ${mb_line_dots}"
+}
+
+
+cfgtest_makevar_append()
+{
+	mb_internal_str='+='
+
+	for mb_internal_arg ; do
+		if ! [ -z "$mb_internal_arg" ]; then
+			mb_internal_str="$mb_internal_str $mb_internal_arg"
+		fi
+	done
+
+	printf '%-24s%s\n' "$mb_cfgtest_makevar" "$mb_internal_str" \
+		>> $mb_pwd/cfgdefs.mk
+
+	unset cfgtest_internal_unit_test
+}
+
+
+cfgtest_cflags_append()
+{
+	if [ $mb_cfgtest_cfgtype = 'host' ]; then
+		mb_internal_makevar='CFLAGS_CONFIG'
+	else
+		mb_internal_makevar='NATIVE_CFLAGS'
+	fi
+
+	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar
+	mb_cfgtest_makevar=$mb_internal_makevar
+
+	cfgtest_makevar_append "$@"
+	mb_cfgtest_makevar=$mb_cfgtest_makevar_saved
+}
+
+
+cfgtest_ldflags_append()
+{
+	if [ $mb_cfgtest_cfgtype = 'host' ]; then
+		mb_internal_makevar='LDFLAGS_CONFIG'
+	else
+		mb_internal_makevar='NATIVE_LDFLAGS'
+	fi
+
+	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar
+	mb_cfgtest_makevar=$mb_internal_makevar
+
+	cfgtest_makevar_append "$@"
+	mb_cfgtest_makevar=$mb_cfgtest_makevar_saved
+}
+
+
+cfgtest_header_presence()
+{
+	cfgtest_prolog 'header' "${1}"
+
+	printf '%s -E -xc - \\\n' "$mb_cfgtest_cc"  >&3
+
+	for cfgtest_cflag in $mb_cfgtest_cflags; do
+		printf '\t%s \\\n' "$cfgtest_cflag" >&3
+	done
+
+	printf '\t%s\n\n' '--include='"${1}" >&3
+
+	cfgtest_cmd=$(printf '%s -E -xc - %s %s'     \
+		"$mb_cfgtest_cc" "$mb_cfgtest_cflags" \
+		'--include='"${1}")
+
+	eval $(printf '%s' "$cfgtest_cmd") \
+		< /dev/null                 \
+		> /dev/null 2>&3             \
+	|| cfgtest_epilog 'header' '-----'    \
+	|| return
+
+	mb_internal_str=$(printf '%s%s' '-DHAVE_' "${1}"  \
+			| sed -e 's/\./_/g' -e 's@/@_@g'  \
+			| tr "[:lower:]" "[:upper:]")
+
+	if [ -z ${cfgtest_internal_unit_test:-} ]; then
+		cfgtest_cflags_append "$mb_internal_str"
+	else
+		cfgtest_makevar_append "$mb_internal_str"
+	fi
+
+	printf 'cfgtest: %s header <%s> was found and may be included.\n' \
+		"$mb_cfgtest_cfgtype" "${1}" >&3
+	printf '%s\n' '------------------------' >&3
+
+	cfgtest_epilog 'header' "${1}"
+}
+
+
+cfgtest_header_absence()
+{
+	cfgtest_prolog 'header absence' "${1}"
+
+	printf '%s -E -xc - \\\n' "$mb_cfgtest_cc"  >&3
+
+	for cfgtest_cflag in $mb_cfgtest_cflags; do
+		printf '\t%s \\\n' "$cfgtest_cflag" >&3
+	done
+
+	printf '\t%s\n\n' '--include='"${1}" >&3
+
+	cfgtest_cmd=$(printf '%s -E -xc - %s %s'     \
+		"$mb_cfgtest_cc" "$mb_cfgtest_cflags" \
+		'--include='"${1}")
+
+	eval $(printf '%s' "$cfgtest_cmd") \
+		< /dev/null                 \
+		> /dev/null 2>&3             \
+	&& cfgtest_epilog 'header' "${1}"     \
+	&& return
+
+	mb_internal_str=$(printf '%s%s' '-DHAVE_NO_' "$@" \
+			| sed -e 's/\./_/g' -e 's@/@_@g'  \
+			| tr "[:lower:]" "[:upper:]")
+
+	if [ -z ${cfgtest_internal_unit_test:-} ]; then
+		cfgtest_cflags_append "$mb_internal_str"
+	else
+		cfgtest_makevar_append "$mb_internal_str"
+	fi
+
+	printf 'cfgtest: %s header <%s> may not be included.\n' \
+		"$mb_cfgtest_cfgtype" "${1}" >&3
+	printf '%s\n' '------------------------' >&3
+
+	cfgtest_epilog 'header' '-----'
+}
+
+
+cfgtest_interface_presence()
+{
+	cfgtest_prolog 'interface' "${1}"
+
+	mb_internal_cflags=
+
+	for mb_header in $mb_cfgtest_headers; do
+		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"
+	done
+
+	cfgtest_code_snippet=$(printf 'void * addr = &%s;' "${1}")
+
+	printf 'printf %s "%s" \\\n' "'%s'" "$cfgtest_code_snippet" >&3
+	printf '| %s -S -xc - -o -' "$mb_cfgtest_cc"  >&3
+
+	for cfgtest_cflag in $mb_cfgtest_cflags; do
+		printf ' \\\n\t%s' "$cfgtest_cflag" >&3
+	done
+
+	for cfgtest_cflag in $mb_internal_cflags; do
+		printf ' \\\n\t%s' "$cfgtest_cflag" >&3
+	done
+
+	printf '\n\n' >&3
+
+	cfgtest_cmd=$(printf '%s -S -xc - -o - %s %s' \
+		"$mb_cfgtest_cc" "$mb_cfgtest_cflags"  \
+		"$mb_internal_cflags")
+
+	printf '%s' "$cfgtest_code_snippet"         \
+		| eval $(printf '%s' "$cfgtest_cmd") \
+                > /dev/null 2>&3                      \
+       || cfgtest_epilog 'interface' '(error)'         \
+       || return
+
+	mb_internal_str=$(printf '%s%s' '-DHAVE_' "$@"  \
+			| sed -e 's/\./_/g'             \
+			| tr "[:lower:]" "[:upper:]")
+
+	if [ -z ${cfgtest_internal_unit_test:-} ]; then
+		cfgtest_cflags_append "$mb_internal_str"
+	else
+		cfgtest_makevar_append "$mb_internal_str"
+	fi
+
+	printf 'cfgtest: %s interface `%s'"'"' is available.\n' \
+		"$mb_cfgtest_cfgtype" "${1}" >&3
+	printf '%s\n' '------------------------' >&3
+
+	cfgtest_epilog 'interface' "${1}"
+
+	return 0
+}
+
+
+cfgtest_decl_presence()
+{
+	cfgtest_prolog 'decl' "${1}"
+
+	mb_internal_cflags=
+
+	for mb_header in $mb_cfgtest_headers; do
+		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"
+	done
+
+	cfgtest_code_snippet=$(printf 'void * any = (void *)(%s);' "${1}")
+
+	printf 'printf %s "%s" \\\n' "'%s'" "$cfgtest_code_snippet" >&3
+	printf '| %s -S -xc - -o -' "$mb_cfgtest_cc"  >&3
+
+	for cfgtest_cflag in $mb_cfgtest_cflags; do
+		printf ' \\\n\t%s' "$cfgtest_cflag" >&3
+	done
+
+	for cfgtest_cflag in $mb_internal_cflags; do
+		printf ' \\\n\t%s' "$cfgtest_cflag" >&3
+	done
+
+	printf '\n\n' >&3
+
+	cfgtest_cmd=$(printf '%s -S -xc - -o - %s %s' \
+		"$mb_cfgtest_cc" "$mb_cfgtest_cflags" \
+		"$mb_internal_cflags")
+
+	printf '%s' "$cfgtest_code_snippet"         \
+		| eval $(printf '%s' "$cfgtest_cmd") \
+                > /dev/null 2>&3                      \
+       || cfgtest_epilog 'decl' '(error)'              \
+       || return
+
+	# does the argument solely consist of the macro or enum member name?
+	mb_internal_str=$(printf '%s' "$@" | tr -d '[a-z][A-Z][0-9][_]')
+
+	if [ -n "$mb_internal_str" ]; then
+		cfgtest_epilog 'decl' '(defined)'
+		return 0
+	fi
+
+	mb_internal_str=$(printf '%s%s' '-DHAVE_DECL_' "$@"  \
+			| sed -e 's/\./_/g'                  \
+			| tr "[:lower:]" "[:upper:]")
+
+	if [ -z ${cfgtest_internal_unit_test:-} ]; then
+		cfgtest_cflags_append "$mb_internal_str"
+	else
+		cfgtest_makevar_append "$mb_internal_str"
+	fi
+
+	printf 'cfgtest: `%s'"'"' is defined for the %s system.\n' \
+		"${1}" "$mb_cfgtest_cfgtype" >&3
+	printf '%s\n' '------------------------' >&3
+
+	cfgtest_epilog 'decl' '(defined)'
+
+	return 0
+}
+
+
+cfgtest_type_size()
+{
+	cfgtest_entity_size_prolog "$@"
+
+	mb_internal_cflags=''
+	mb_internal_size=''
+	mb_internal_test='char x[(sizeof(%s) == %s) ? 1 : -1];'
+
+	for mb_header in $mb_cfgtest_headers; do
+		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"
+	done
+
+	for mb_internal_guess in 8 4 2 1 16 32 64 128; do
+		if [ -z $mb_internal_size ]; then
+			mb_internal_type="$@"
+
+			mb_internal_str=$(printf "$mb_internal_test"    \
+				"$mb_internal_type"                     \
+				"$mb_internal_guess")
+
+			printf '%s' "$mb_internal_str"                      \
+					| eval $mb_cfgtest_cc -S -xc - -o - \
+					  $mb_cfgtest_cflags                \
+					  $mb_internal_cflags               \
+				> /dev/null 2>/dev/null                     \
+			&& mb_internal_size=$mb_internal_guess
+		fi
+	done
+
+	# unrecognized type, or type size not within range
+	if [ -z $mb_internal_size ]; then
+		cfgtest_epilog 'size-of-type' '(error)'
+		return 1
+	fi
+
+	# -DSIZEOF_TYPE=SIZE
+	mb_internal_str=$(printf '%s%s=%s' '-DSIZEOF_'        \
+				"$mb_internal_type"           \
+				"$mb_internal_size"           \
+			| sed -e 's/\ /_/g' -e 's/*/P/g'      \
+			| tr "[:lower:]" "[:upper:]")
+
+	if [ -z ${cfgtest_internal_unit_test:-} ]; then
+		cfgtest_cflags_append "$mb_internal_str"
+	else
+		cfgtest_makevar_append "$mb_internal_str"
+	fi
+
+	printf 'cfgtest: size of type `%s'"'"' determined to be %s\n' \
+		"${@}" "$mb_internal_size" >&3
+	printf '%s\n' '------------------------' >&3
+
+	cfgtest_epilog 'size-of-type' "$mb_internal_size"
+
+	return 0
+}
+
+
+cfgtest_code_snippet()
+{
+	mb_internal_cflags=''
+	mb_internal_test="$@"
+
+	for mb_header in $mb_cfgtest_headers; do
+		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"
+	done
+
+	printf '%s' "$mb_internal_test"                       \
+			| eval $mb_cfgtest_cc -S -xc - -o -   \
+			  $mb_cfgtest_cflags                  \
+			  $mb_internal_cflags                 \
+		> /dev/null 2>/dev/null                       \
+	|| return 1
+
+	return 0
+}
+
+
+cfgtest_code_snippet_asm()
+{
+	mb_internal_cflags=''
+	mb_internal_test="$@"
+
+	cfgtest_tmp=$(mktemp ./tmp_XXXXXXXXXXXXXXXX)
+	cfgtest_ret=1
+
+	for mb_header in $mb_cfgtest_headers; do
+		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"
+	done
+
+	printf '%s' "$mb_internal_test"                 \
+			| eval $mb_cfgtest_cc -c -xc -  \
+			  -o $cfgtest_tmp               \
+			  $mb_cfgtest_cflags            \
+			  $mb_internal_cflags           \
+		> /dev/null 2>/dev/null                 \
+	&& cfgtest_ret=0
+
+	rm -f "$cfgtest_tmp"
+	unset cfgtest_tmp
+
+	return $cfgtest_ret
+}
+
+
+cfgtest_library_presence()
+{
+	cfgtest_libs=
+	cfgtest_spc=
+
+	for cfgtest_lib in ${@}; do
+		cfgtest_libs="$cfgtest_libs$cfgtest_spc$cfgtest_lib"
+		cfgtest_spc=' '
+	done
+
+	if [ "${1}" = "$cfgtest_libs" ]; then
+		cfgtest_prolog 'library' "${1#*-l}"
+	else
+		cfgtest_prolog 'lib module' '(see config.log)'
+	fi
+
+	cfgtest_code_snippet='int main(void){return 0;}'
+
+	printf 'printf %s "%s" \\\n' "'%s'" "$cfgtest_code_snippet" >&3
+	printf '| %s -o a.out -xc -' "$mb_cfgtest_cc"  >&3
+
+	for cfgtest_cflag in $mb_cfgtest_cflags; do
+		printf ' \\\n\t%s' "$cfgtest_cflag" >&3
+	done
+
+	for cfgtest_lib in ${@}; do
+		printf ' \\\n\t%s' "$cfgtest_lib" >&3
+	done
+
+	printf '\n\n' >&3
+
+	cfgtest_cmd=$(printf '%s -o a.out -xc - %s %s %s' \
+		"$mb_cfgtest_cc" "$mb_cfgtest_cflags"      \
+		"$mb_cfgtest_ldflags" "$cfgtest_libs")
+
+	printf '%s' "$cfgtest_code_snippet"          \
+		| eval $(printf '%s' "$cfgtest_cmd") \
+		> /dev/null 2>&3                     \
+	|| cfgtest_epilog 'library' '-----'          \
+	|| return 1
+
+	rm -f a.out
+
+	printf 'cfgtest: `%s'"'"' was accepted by the linker driver.\n' \
+		"$cfgtest_libs" >&3
+	printf '%s\n' '------------------------' >&3
+
+	cfgtest_epilog 'library' '(present)'
+
+	return 0
+}
+
+
+cfgtest_unit_header_presence()
+{
+	cfgtest_internal_unit_test='unit_test'
+	cfgtest_header_presence "$@" || return 1
+	return 0
+}
+
+
+cfgtest_unit_header_absence()
+{
+	cfgtest_internal_unit_test='unit_test'
+	cfgtest_header_absence "$@" || return 1
+	return 0
+}
+
+
+cfgtest_unit_interface_presence()
+{
+	cfgtest_internal_unit_test='unit_test'
+	cfgtest_interface_presence "$@" || return 1
+	return 0
+}
+
+
+cfgtest_unit_decl_presence()
+{
+	cfgtest_internal_unit_test='unit_test'
+	cfgtest_decl_presence "$@" || return 1
+	return 0
+}
+
+
+cfgtest_unit_type_size()
+{
+	cfgtest_internal_unit_test='unit_test'
+	cfgtest_type_size "$@" || return 1
+	return 0
+}
diff --git a/sofort/config/cfgdefs.in b/sofort/config/cfgdefs.in
new file mode 100644
index 0000000..fd4b947
--- /dev/null
+++ b/sofort/config/cfgdefs.in
@@ -0,0 +1,6 @@
+# changes made to this file will be gone the next time
+#   you run ./configure.
+
+# for persistent post-configure, ad-hoc changes to the
+#   build project, use usrdefs.mk instead.
+
diff --git a/sofort/config/config.vars b/sofort/config/config.vars
new file mode 100644
index 0000000..903abd5
--- /dev/null
+++ b/sofort/config/config.vars
@@ -0,0 +1,143 @@
+package
+nickname
+project_dir
+source_dir
+git_reference_index
+custom_install_headers
+avoid_version
+
+ccenv
+ccenv_create_log
+ccenv_skip_native
+
+pkgname
+pkgdesc
+pkgusrc
+pkgrepo
+pkgpsrc
+pkgdurl
+pkgbugs
+pkghome
+pkgdefs
+pkglibs
+
+srcinfo
+srcsite
+
+pgprkey
+pgpskey
+
+rawball
+rawball_url
+rawball_sha256
+modball
+modball_url
+modball_sha256
+srcball
+srcball_url
+srcball_sha256
+
+
+make
+makefile
+makemode
+
+build
+host
+cchost
+cfghost
+target
+arch
+compiler
+toolchain
+zealous
+sysroot
+cross_compile
+shell
+
+prefix
+exec_prefix
+bindir
+sbindir
+libdir
+includedir
+oldincludedir
+mandir
+docdir
+libexecdir
+
+sysconfdir
+sharedstatedir
+localstatedir
+runstatedir
+datarootdir
+datadir
+infodir
+localedir
+htmldir
+dvidir
+pdfdir
+psdir
+
+cflags
+cflags_common
+cflags_debug
+cflags_cmdline
+cflags_config
+cflags_sysroot
+cflags_os
+cflags_site
+cflags_path
+cflags_strict
+cflags_util
+cflags_last
+cflags_once
+
+ldflags
+ldflags_common
+ldflags_debug
+ldflags_cmdline
+ldflags_config
+ldflags_sysroot
+ldflags_path
+ldflags_strict
+ldflags_util
+ldflags_last
+ldflags_once
+
+cc
+cpp
+cxx
+
+user_cc
+user_cpp
+user_cxx
+
+pe_subsystem
+pe_image_base
+
+native_cc
+native_cpp
+native_cxx
+
+native_host
+native_cfghost
+native_cflags
+native_ldflags
+
+native_pe_subsystem
+native_pe_image_base
+
+all_shared
+all_static
+disable_frontend
+disable_shared
+disable_static
+
+use_custom_cfgdefs
+use_custom_cfginit
+use_custom_cfgfini
+use_custom_usrdefs
+
+shared_lib_cmd
+shared_lib_ldflags
diff --git a/sofort/config/flag.vars b/sofort/config/flag.vars
new file mode 100644
index 0000000..4229e3e
--- /dev/null
+++ b/sofort/config/flag.vars
@@ -0,0 +1,25 @@
+# configure
+mb_config
+mb_debug
+
+mb_ccstrict
+mb_ldstrict
+
+mb_program_prefix
+mb_require_source_dir
+
+mb_prefix_set
+mb_bindir_set
+mb_exec_prefix_set
+
+mb_bindir_basename
+
+# ccenv
+mb_agnostic
+
+# cfgtest
+mb_cfgtest_cc
+mb_cfgtest_cflags
+mb_cfgtest_cfgtype
+mb_cfgtest_makevar
+mb_cfgtest_headers
diff --git a/sofort/config/opt.vars b/sofort/config/opt.vars
new file mode 100644
index 0000000..e71ea56
--- /dev/null
+++ b/sofort/config/opt.vars
@@ -0,0 +1,9 @@
+version_opt
+
+shared_library_opt
+static_library_opt
+
+app_frontend_opt
+app_linking_opt
+
+install_headers_opt
diff --git a/sofort/core/_flavor/flavor_app_frontend_disabled.mk b/sofort/core/_flavor/flavor_app_frontend_disabled.mk
new file mode 100644
index 0000000..31ad23a
--- /dev/null
+++ b/sofort/core/_flavor/flavor_app_frontend_disabled.mk
@@ -0,0 +1,6 @@
+# flavor_app_frontend_disabled.mk: handling of frontend build options.
+# this file is covered by COPYING.SOFORT.
+
+app-tag:
+package-install-app:
+package-install-extras:
diff --git a/sofort/core/_flavor/flavor_app_frontend_enabled.mk b/sofort/core/_flavor/flavor_app_frontend_enabled.mk
new file mode 100644
index 0000000..ebbc256
--- /dev/null
+++ b/sofort/core/_flavor/flavor_app_frontend_enabled.mk
@@ -0,0 +1,6 @@
+# flavor_app_frontend_enabled.mk: handling of frontend build options.
+# this file is covered by COPYING.SOFORT.
+
+app-tag:		package-app app.tag
+package-install-app:	install-app
+package-install-extras:	install-extras
diff --git a/sofort/core/_flavor/flavor_app_linking_all_shared.mk b/sofort/core/_flavor/flavor_app_linking_all_shared.mk
new file mode 100644
index 0000000..fe89318
--- /dev/null
+++ b/sofort/core/_flavor/flavor_app_linking_all_shared.mk
@@ -0,0 +1,7 @@
+# flavor_app_linking_all_shared.mk: handling of frontend linking options.
+# this file is covered by COPYING.SOFORT.
+
+PACKAGE_APP   = $(SHARED_APP)
+
+package-app:	shared-app
+app.tag:	$(SHARED_APP)
diff --git a/sofort/core/_flavor/flavor_app_linking_all_static.mk b/sofort/core/_flavor/flavor_app_linking_all_static.mk
new file mode 100644
index 0000000..7a5f620
--- /dev/null
+++ b/sofort/core/_flavor/flavor_app_linking_all_static.mk
@@ -0,0 +1,7 @@
+# flavor_app_linking_all_static.mk: handling of frontend linking options.
+# this file is covered by COPYING.SOFORT.
+
+PACKAGE_APP   = $(STATIC_APP)
+
+package-app:	static-app
+app.tag:	$(STATIC_APP)
diff --git a/sofort/core/_flavor/flavor_app_linking_default.mk b/sofort/core/_flavor/flavor_app_linking_default.mk
new file mode 100644
index 0000000..b0c1d34
--- /dev/null
+++ b/sofort/core/_flavor/flavor_app_linking_default.mk
@@ -0,0 +1,7 @@
+# flavor_app_linking_default.mk: handling of frontend linking options.
+# this file is covered by COPYING.SOFORT.
+
+PACKAGE_APP   = $(DEFAULT_APP)
+
+package-app:	default-app
+app.tag:	$(DEFAULT_APP)
diff --git a/sofort/core/_flavor/flavor_install_headers_custom.mk b/sofort/core/_flavor/flavor_install_headers_custom.mk
new file mode 100644
index 0000000..4f8da97
--- /dev/null
+++ b/sofort/core/_flavor/flavor_install_headers_custom.mk
@@ -0,0 +1,4 @@
+# flavor_install_headers_custom.mk: handling of header installation option.
+# this file is covered by COPYING.SOFORT.
+
+install-headers:install-headers-custom
diff --git a/sofort/core/_flavor/flavor_install_headers_default.mk b/sofort/core/_flavor/flavor_install_headers_default.mk
new file mode 100644
index 0000000..f8b49c4
--- /dev/null
+++ b/sofort/core/_flavor/flavor_install_headers_default.mk
@@ -0,0 +1,4 @@
+# flavor_install_headers_default.mk: handling of header installation option.
+# this file is covered by COPYING.SOFORT.
+
+install-headers:install-headers-default
diff --git a/sofort/core/_flavor/flavor_shared_library_disabled.mk b/sofort/core/_flavor/flavor_shared_library_disabled.mk
new file mode 100644
index 0000000..9846e1b
--- /dev/null
+++ b/sofort/core/_flavor/flavor_shared_library_disabled.mk
@@ -0,0 +1,5 @@
+# flavor_shared_library_disabled.mk: handling of shared library dependencies.
+# this file is covered by COPYING.SOFORT.
+
+package-shared:
+package-install-shared:
diff --git a/sofort/core/_flavor/flavor_shared_library_enabled.mk b/sofort/core/_flavor/flavor_shared_library_enabled.mk
new file mode 100644
index 0000000..2e54d21
--- /dev/null
+++ b/sofort/core/_flavor/flavor_shared_library_enabled.mk
@@ -0,0 +1,5 @@
+# flavor_shared_library_enabled.mk: handling of shared library dependencies.
+# this file is covered by COPYING.SOFORT.
+
+package-shared:		shared
+package-install-shared:	install-shared
diff --git a/sofort/core/_flavor/flavor_static_library_disabled.mk b/sofort/core/_flavor/flavor_static_library_disabled.mk
new file mode 100644
index 0000000..e46d186
--- /dev/null
+++ b/sofort/core/_flavor/flavor_static_library_disabled.mk
@@ -0,0 +1,5 @@
+# flavor_static_library_disabled.mk: handling of static library dependencies.
+# this file is covered by COPYING.SOFORT.
+
+package-static:
+package-install-static:
diff --git a/sofort/core/_flavor/flavor_static_library_enabled.mk b/sofort/core/_flavor/flavor_static_library_enabled.mk
new file mode 100644
index 0000000..20d4bd8
--- /dev/null
+++ b/sofort/core/_flavor/flavor_static_library_enabled.mk
@@ -0,0 +1,5 @@
+# flavor_static_library_enabled.mk: handling of static library dependencies.
+# this file is covered by COPYING.SOFORT.
+
+package-static:		static
+package-install-static:	install-static
diff --git a/sofort/core/_infer/infer_modern.mk b/sofort/core/_infer/infer_modern.mk
new file mode 100644
index 0000000..aaf3361
--- /dev/null
+++ b/sofort/core/_infer/infer_modern.mk
@@ -0,0 +1,22 @@
+# infer_modern.mk: modern make target- and inference rules.
+# this file is covered by COPYING.SOFORT.
+
+src/%.ao: 	$(SOURCE_DIR)/src/%.c
+		$(CC) -c -o $@ $< $(CFLAGS_APP)
+
+src/%.lo: 	$(SOURCE_DIR)/src/%.c
+		$(CC) -c -o $@ $< $(CFLAGS_SHARED)
+
+src/%.o: 	$(SOURCE_DIR)/src/%.c
+		$(CC) -c -o $@ $< $(CFLAGS_STATIC)
+
+$(SHARED_LIB):
+		$(SHARED_LIB_CMD) $@ $^ $(SHARED_LIB_LDFLAGS) $(LDFLAGS_IMPLIB)
+
+lib/%$(OS_ARCHIVE_EXT):
+		mkdir -p lib
+		rm -f $@
+		$(AR) rcs $@ $^
+
+srcs.tag:
+		touch $@
diff --git a/sofort/core/_infer/infer_posix.mk b/sofort/core/_infer/infer_posix.mk
new file mode 100644
index 0000000..ae990e8
--- /dev/null
+++ b/sofort/core/_infer/infer_posix.mk
@@ -0,0 +1,27 @@
+# infer_posix.mk: posix make target- and inference rules.
+# this file is covered by COPYING.SOFORT.
+
+.c.ao:
+	$(CC) -c -o $@ $< $(CFLAGS_APP)
+
+.c.lo:
+	$(CC) -c -o $@ $< $(CFLAGS_SHARED)
+
+.c.o:
+	$(CC) -c -o $@ $< $(CFLAGS_STATIC)
+
+$(SHARED_LIB):
+		$(SHARED_LIB_CMD) $@ $(SHARED_OBJS) $(SHARED_LIB_LDFLAGS) $(LDFLAGS_IMPLIB)
+
+$(STATIC_LIB):
+		mkdir -p lib
+		rm -f $@
+		$(AR) rcs $@ $(STATIC_OBJS)
+
+srcs.tag:	tree.tag
+
+srcs.tag:
+	$(PROJECT_DIR)/sofort/tools/srctree.sh \
+		--srctree=$(SOURCE_DIR) --      \
+		$(COMMON_SRCS) $(APP_SRCS)
+	touch $@
diff --git a/sofort/core/_version/_soname/version_soname_copy.mk b/sofort/core/_version/_soname/version_soname_copy.mk
new file mode 100644
index 0000000..c176d5a
--- /dev/null
+++ b/sofort/core/_version/_soname/version_soname_copy.mk
@@ -0,0 +1,8 @@
+# version_soname_copy.mk: handling of shared library versioning schemes.
+# this file is covered by COPYING.SOFORT.
+
+install-soname:		install-lib
+			cp $(SHARED_LIB) $(DESTDIR)$(LIBDIR)/$(DSO_SONAME)
+
+$(SHARED_SONAME):	$(SHARED_LIB)
+			cp $(SHARED_LIB) $(SHARED_SONAME)
diff --git a/sofort/core/_version/_soname/version_soname_symlink.mk b/sofort/core/_version/_soname/version_soname_symlink.mk
new file mode 100644
index 0000000..963b891
--- /dev/null
+++ b/sofort/core/_version/_soname/version_soname_symlink.mk
@@ -0,0 +1,12 @@
+# version_soname_symlink.mk: handling of shared library versioning schemes.
+# this file is covered by COPYING.SOFORT.
+
+$(SHARED_SONAME):	$(SHARED_LIB)
+			rm -f $@.tmp
+			ln -s $(DSO_VER) $@.tmp
+			mv $@.tmp $@
+
+install-soname:		install-lib
+			rm -f $(SHARED_SONAME).tmp
+			ln -s $(DSO_VER) $(SHARED_SONAME).tmp
+			mv $(SHARED_SONAME).tmp $(DESTDIR)$(LIBDIR)/$(DSO_SONAME)
diff --git a/sofort/core/_version/version_none.mk b/sofort/core/_version/version_none.mk
new file mode 100644
index 0000000..d8fc570
--- /dev/null
+++ b/sofort/core/_version/version_none.mk
@@ -0,0 +1,10 @@
+# version_none.mk: handling of shared library versioning schemes.
+# this file is covered by COPYING.SOFORT.
+
+VER_XYZ		=
+VER_SONAME	=
+
+package-shared-soname:
+package-shared-solink:
+package-install-soname:
+package-install-solink:
diff --git a/sofort/core/_version/version_used.mk b/sofort/core/_version/version_used.mk
new file mode 100644
index 0000000..4724cee
--- /dev/null
+++ b/sofort/core/_version/version_used.mk
@@ -0,0 +1,26 @@
+# version_used.mk: handling of shared library versioning schemes.
+# this file is covered by COPYING.SOFORT.
+
+VER_XYZ		= .$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH)
+VER_SONAME	= .$(VER_MAJOR)
+
+package-shared-soname:	shared-soname
+package-shared-solink:	shared-solink
+package-install-soname:	install-soname
+package-install-solink:	install-solink
+
+
+
+# libfoo.so (common)
+install-solink:		install-lib
+			rm -f $(SHARED_SOLINK).tmp
+			ln -s $(DSO_VER) $(SHARED_SOLINK).tmp
+			mv $(SHARED_SOLINK).tmp $(DESTDIR)$(LIBDIR)/$(DSO_SOLINK)
+
+$(SHARED_SOLINK):	$(SHARED_LIB)
+			rm -f $@.tmp
+			ln -s $(DSO_VER) $@.tmp
+			mv $@.tmp $@
+
+# libfoo.so.x (symlink or copy)
+include $(PROJECT_DIR)/sofort/core/_version/_soname/version_soname_$(OS_SONAME).mk
diff --git a/sofort/core/defs.mk b/sofort/core/defs.mk
new file mode 100644
index 0000000..2622cff
--- /dev/null
+++ b/sofort/core/defs.mk
@@ -0,0 +1,66 @@
+SHARED_LIB_DEPS    +=
+SHARED_APP_DEPS    +=
+STATIC_APP_DEPS    +=
+
+COMMON_LOBJS	   += $(COMMON_SRCS:.c=.lo)
+COMMON_OBJS	   += $(COMMON_SRCS:.c=.o)
+
+ARCH_LOBJS	   += $(ARCH_SRCS:.c=.lo)
+ARCH_OBJS	   += $(ARCH_SRCS:.c=.o)
+
+APP_LOBJS	   += $(APP_SRCS:.c=.lo)
+APP_OBJS	   += $(APP_SRCS:.c=.ao)
+
+SHARED_OBJS	   += $(COMMON_LOBJS) $(ARCH_LOBJS)
+STATIC_OBJS	   += $(COMMON_OBJS)  $(ARCH_OBJS)
+
+STATIC_LIB_NAME     = $(OS_LIB_PREFIX)$(PACKAGE)$(OS_ARCHIVE_EXT)
+STATIC_LIB          = lib/$(STATIC_LIB_NAME)
+
+DSO_VER             = $(OS_LIB_PREFIX)$(PACKAGE)$(OS_LIB_PREFIXED_SUFFIX)$(VER_XYZ)$(OS_LIB_SUFFIXED_SUFFIX)
+DSO_SONAME          = $(OS_LIB_PREFIX)$(PACKAGE)$(OS_LIB_PREFIXED_SUFFIX)$(VER_SONAME)$(OS_LIB_SUFFIXED_SUFFIX)
+DSO_SOLINK          = $(OS_LIB_PREFIX)$(PACKAGE)$(OS_LIB_SUFFIX)
+
+SHARED_LIB          = lib/$(DSO_VER)
+SHARED_SONAME       = lib/$(DSO_SONAME)
+SHARED_SOLINK       = lib/$(DSO_SOLINK)
+
+IMP_DEF             = $(OS_LIB_PREFIX)$(PACKAGE)$(VER_XYZ)$(OS_LIBDEF_EXT)
+IMP_VER             = $(OS_LIB_PREFIX)$(PACKAGE)$(VER_XYZ)$(OS_IMPLIB_EXT)
+IMP_SONAME          = $(OS_LIB_PREFIX)$(PACKAGE)$(VER_SONAME)$(OS_IMPLIB_EXT)
+IMP_SOLINK          = $(OS_LIB_PREFIX)$(PACKAGE)$(OS_IMPLIB_EXT)
+
+IMPLIB_DEF          = lib/$(IMP_DEF)
+IMPLIB_VER          = lib/$(IMP_VER)
+IMPLIB_SONAME       = lib/$(IMP_SONAME)
+IMPLIB_SOLINK       = lib/$(IMP_SOLINK)
+
+APP                 = bin/$(OS_APP_PREFIX)$(NICKNAME)$(OS_APP_SUFFIX)
+DEFAULT_APP         = bin/$(OS_APP_PREFIX)$(NICKNAME)-default$(OS_APP_SUFFIX)
+SHARED_APP          = bin/$(OS_APP_PREFIX)$(NICKNAME)-shared$(OS_APP_SUFFIX)
+STATIC_APP          = bin/$(OS_APP_PREFIX)$(NICKNAME)-static$(OS_APP_SUFFIX)
+
+CFLAGS              = $(CFLAGS_DEBUG)   $(CFLAGS_CONFIG)  $(CFLAGS_SYSROOT) \
+                      $(CFLAGS_COMMON)  $(CFLAGS_CMDLINE) $(CFLAGS_HOST)     \
+                      $(CFLAGS_PATH)    $(CFLAGS_OS)      $(CFLAGS_SITE)      \
+                      $(CFLAGS_VERSION) $(CFLAGS_STRICT)                       \
+                      $(CFLAGS_LAST)    $(CFLAGS_ONCE)
+
+CFLAGS_SHARED       = $(CFLAGS) $(CFLAGS_PIC) $(CFLAGS_SHARED_ATTR)
+CFLAGS_STATIC       = $(CFLAGS) $(CFLAGS_OBJ) $(CFLAGS_STATIC_ATTR)
+CFLAGS_APP          = $(CFLAGS) $(CFLAGS_OBJ) $(CFLAGS_APP_ATTR) $(CFLAGS_UTIL)
+
+LDFLAGS_SHARED      = $(LDFLAGS_DEBUG)   $(LDFLAGS_CONFIG)  $(LDFLAGS_SYSROOT) \
+                      $(LDFLAGS_COMMON)  $(LDFLAGS_CMDLINE) $(LDFLAGS_HOST)     \
+                      $(LDFLAGS_PATH)    $(SHARED_LIB_DEPS) $(LDFLAGS_STRICT)    \
+                      $(LDFLAGS_LAST)    $(LDFLAGS_ONCE)
+
+LDFLAGS_APP         = $(LDFLAGS_DEBUG)   $(LDFLAGS_CONFIG)  $(LDFLAGS_SYSROOT) \
+                      $(LDFLAGS_COMMON)  $(LDFLAGS_CMDLINE) $(LDFLAGS_HOST)     \
+                      $(LDFLAGS_PATH)    $(SHARED_APP_DEPS) $(LDFLAGS_STRICT)    \
+                      $(LDFLAGS_UTIL)    $(LDFLAGS_LAST)    $(LDFLAGS_ONCE)
+
+LDFLAGS_STATIC      = $(LDFLAGS_DEBUG)   $(LDFLAGS_CONFIG)  $(LDFLAGS_SYSROOT) \
+                      $(LDFLAGS_COMMON)  $(LDFLAGS_CMDLINE) $(LDFLAGS_HOST)     \
+                      $(LDFLAGS_PATH)    $(STATIC_APP_DEPS) $(LDFLAGS_STRICT)    \
+                      $(LDFLAGS_LAST)    $(LDFLAGS_ONCE)
diff --git a/sofort/core/flavor.mk b/sofort/core/flavor.mk
new file mode 100644
index 0000000..6a7c97a
--- /dev/null
+++ b/sofort/core/flavor.mk
@@ -0,0 +1,12 @@
+# flavor.mk: top-level handling of build flavors.
+# this file is covered by COPYING.SOFORT.
+
+include $(PROJECT_DIR)/sofort/exrules/$(OS_DSO_EXRULES).mk
+
+include $(PROJECT_DIR)/sofort/core/_flavor/flavor_static_library_$(STATIC_LIBRARY_OPT).mk
+include $(PROJECT_DIR)/sofort/core/_flavor/flavor_shared_library_$(SHARED_LIBRARY_OPT).mk
+
+include $(PROJECT_DIR)/sofort/core/_flavor/flavor_app_frontend_$(APP_FRONTEND_OPT).mk
+include $(PROJECT_DIR)/sofort/core/_flavor/flavor_app_linking_$(APP_LINKING_OPT).mk
+
+include $(PROJECT_DIR)/sofort/core/_flavor/flavor_install_headers_$(INSTALL_HEADERS_OPT).mk
diff --git a/sofort/core/infer.mk b/sofort/core/infer.mk
new file mode 100644
index 0000000..8a1c6dd
--- /dev/null
+++ b/sofort/core/infer.mk
@@ -0,0 +1,4 @@
+# infer.mk: top-level handling of inference rules.
+# this file is covered by COPYING.SOFORT.
+
+include $(PROJECT_DIR)/sofort/core/_infer/infer_$(MAKEMODE).mk
diff --git a/sofort/core/pkgconf.mk b/sofort/core/pkgconf.mk
new file mode 100644
index 0000000..5ada069
--- /dev/null
+++ b/sofort/core/pkgconf.mk
@@ -0,0 +1,39 @@
+# pkgconf.mk: rules for pkgconf manifest generation.
+# this file is covered by COPYING.SOFORT.
+
+PKGCONF_VERSION = $(VER_MAJOR).$(VER_MINOR).$(VER_PATCH)
+
+.pkgconf:
+
+build/$(PACKAGE).pc: .pkgconf dirs.tag
+
+build/$(PACKAGE).pc:
+	@touch $@
+	@chmod 0644 $@
+		PKGCONF_NAME='$(PKGNAME)' \
+		PKGCONF_DESC='$(PKGDESC)' \
+		PKGCONF_USRC='$(PKGUSRC)' \
+		PKGCONF_REPO='$(PKGREPO)' \
+		PKGCONF_PSRC='$(PKGPSRC)' \
+		PKGCONF_DURL='$(PKGDURL)' \
+		PKGCONF_BUGS='$(PKGBUGS)' \
+		PKGCONF_HOME='$(PKGHOME)' \
+		PKGCONF_DEFS='$(PKGDEFS)' \
+		PKGCONF_LIBS='$(PKGLIBS)' \
+					  \
+		PKGCONF_EXEC_PREFIX='$(EXEC_PREFIX)' \
+		PKGCONF_PREFIX='$(PREFIX)'           \
+		PKGCONF_LIBDIR='$(LIBDIR)'           \
+		PKGCONF_INCLUDEDIR='$(INCLUDEDIR)'   \
+		PKGCONF_VERSION='$(PKGCONF_VERSION)' \
+	$(PROJECT_DIR)/sofort/tools/pkgconf.sh > $@
+
+install-pkgconf: build/$(PACKAGE).pc
+	mkdir -p $(DESTDIR)$(LIBDIR)/pkgconfig
+	cp -p build/$(PACKAGE).pc    $(DESTDIR)$(LIBDIR)/pkgconfig
+
+install-shared: install-pkgconf
+
+install-static: install-pkgconf
+
+.PHONY: .pkgconf install-pkgconf
diff --git a/sofort/core/version.mk b/sofort/core/version.mk
new file mode 100644
index 0000000..ad693ab
--- /dev/null
+++ b/sofort/core/version.mk
@@ -0,0 +1,10 @@
+# version.mk: handling of shared library versioning schemes.
+# this file is covered by COPYING.SOFORT.
+
+include $(PROJECT_DIR)/project/tagver.mk
+
+CFLAGS_VERSION	+= -D$(VER_NAMESPACE)_TAG_VER_MAJOR=$(VER_MAJOR)
+CFLAGS_VERSION	+= -D$(VER_NAMESPACE)_TAG_VER_MINOR=$(VER_MINOR)
+CFLAGS_VERSION	+= -D$(VER_NAMESPACE)_TAG_VER_PATCH=$(VER_PATCH)
+
+include $(PROJECT_DIR)/sofort/core/_version/version_$(VERSION_OPT).mk
diff --git a/sofort/exrules/_pe/pe_mdso_version_none.mk b/sofort/exrules/_pe/pe_mdso_version_none.mk
new file mode 100644
index 0000000..cf5e350
--- /dev/null
+++ b/sofort/exrules/_pe/pe_mdso_version_none.mk
@@ -0,0 +1,2 @@
+# pe_mdso_version_none.mk: PE shared library rules for targets using mdso.
+# this file is covered by COPYING.SOFORT.
diff --git a/sofort/exrules/_pe/pe_mdso_version_used.mk b/sofort/exrules/_pe/pe_mdso_version_used.mk
new file mode 100644
index 0000000..fac0246
--- /dev/null
+++ b/sofort/exrules/_pe/pe_mdso_version_used.mk
@@ -0,0 +1,5 @@
+# pe_mdso_version_used.mk: PE shared library rules for targets using mdso.
+# this file is covered by COPYING.SOFORT.
+
+$(IMPLIB_SONAME):	$(IMPLIB_DEF)
+			$(MDSO) -m $(CC_BITS) -i $(IMPLIB_SONAME) -n $(DSO_SONAME) $(IMPLIB_DEF)
diff --git a/sofort/exrules/_pe/pe_version_none.mk b/sofort/exrules/_pe/pe_version_none.mk
new file mode 100644
index 0000000..df33976
--- /dev/null
+++ b/sofort/exrules/_pe/pe_version_none.mk
@@ -0,0 +1,7 @@
+# pe_version_none.mk: handling of PE shared library versioning schemes.
+# this file is covered by COPYING.SOFORT.
+
+package-implib-soname:
+package-implib-solink:
+package-install-implib-soname:
+package-install-implib-solink:
diff --git a/sofort/exrules/_pe/pe_version_used.mk b/sofort/exrules/_pe/pe_version_used.mk
new file mode 100644
index 0000000..8710dae
--- /dev/null
+++ b/sofort/exrules/_pe/pe_version_used.mk
@@ -0,0 +1,23 @@
+# pe_version_used.mk: handling of PE shared library versioning schemes.
+# this file is covered by COPYING.SOFORT.
+
+package-implib-soname:		implib-soname
+package-implib-solink:		implib-solink
+package-install-implib-soname:	install-implib-soname
+package-install-implib-solink:	install-implib-solink
+
+
+$(IMPLIB_SOLINK):	$(IMPLIB_SONAME)
+			rm -f $(IMPLIB_SOLINK).tmp
+			ln -s $(IMP_SONAME) $(IMPLIB_SOLINK).tmp
+			mv $(IMPLIB_SOLINK).tmp $(IMPLIB_SOLINK)
+
+install-implib-soname:	implib-soname
+			mkdir -p $(DESTDIR)$(LIBDIR)
+			cp $(IMPLIB_SONAME) $(DESTDIR)$(LIBDIR)
+
+install-implib-solink:	implib-soname
+			mkdir -p $(DESTDIR)$(LIBDIR)
+			rm -f $(IMPLIB_SOLINK).tmp
+			ln -s $(IMP_SONAME) $(IMPLIB_SOLINK).tmp
+			mv $(IMPLIB_SOLINK).tmp $(DESTDIR)$(LIBDIR)/$(IMP_SOLINK)
diff --git a/sofort/exrules/default.mk b/sofort/exrules/default.mk
new file mode 100644
index 0000000..9844f37
--- /dev/null
+++ b/sofort/exrules/default.mk
@@ -0,0 +1,17 @@
+# default.mk: default shared library rules.
+# this file is covered by COPYING.SOFORT.
+
+DSO_REF_VER      = $(SHARED_LIB)
+DSO_REF_SONAME   = $(SHARED_SONAME)
+DSO_REF_SOLINK   = $(SHARED_SOLINK)
+
+LDFLAGS_SHARED  += -Wl,-soname
+LDFLAGS_SHARED  += -Wl,$(DSO_SONAME)
+
+implib:
+
+install-implib:
+
+clean-implib:
+
+.PHONY:         $(IMPLIB_DEF) $(IMPLIB_VER) $(IMPLIB_SONAME) $(IMPLIB_SOLINK)
diff --git a/sofort/exrules/pe-common.mk b/sofort/exrules/pe-common.mk
new file mode 100644
index 0000000..3e132a9
--- /dev/null
+++ b/sofort/exrules/pe-common.mk
@@ -0,0 +1,42 @@
+# pe-common.mk: common PE shared library rules.
+# this file is covered by COPYING.SOFORT.
+
+DSO_REF_VER      = $(IMPLIB_VER)
+DSO_REF_SONAME   = $(IMPLIB_SONAME)
+DSO_REF_SOLINK   = $(IMPLIB_SOLINK)
+
+LDFLAGS_IMPLIB	+= -Wl,--output-def
+LDFLAGS_IMPLIB	+= -Wl,$(IMPLIB_DEF)
+
+LDFLAGS_SONAME	+= -Wl,-soname
+LDFLAGS_SONAME	+= -Wl,$(DSO_SONAME)
+LDFLAGS_SHARED	+= $(LDFLAGS_SONAME)
+
+DSO_LIBPATH	?= loader
+PE_SUBSYSTEM	?= windows
+LDFLAGS_COMMON	+= -Wl,--subsystem=$(PE_SUBSYSTEM)
+
+implib:			implib-ver package-implib-soname package-implib-solink
+
+implib-ver:		shared-lib $(IMPLIB_VER)
+
+implib-soname:		shared-lib $(IMPLIB_SONAME)
+
+implib-solink:		shared-lib $(IMPLIB_SOLINK)
+
+$(IMPLIB_DEF):		shared-lib
+
+install-implib:		install-implib-ver \
+			package-install-implib-soname \
+			package-install-implib-solink
+
+install-implib-ver:	implib-ver
+			mkdir -p $(DESTDIR)$(LIBDIR)
+			cp $(IMPLIB_VER) $(DESTDIR)$(LIBDIR)
+
+clean-implib:
+			rm -f $(SHARED_LIB)
+			rm -f $(IMPLIB_DEF)
+			rm -f $(IMPLIB_VER)
+			rm -f $(IMPLIB_SONAME)
+			rm -f $(IMPLIB_SOLINK)
diff --git a/sofort/exrules/pe-dlltool.mk b/sofort/exrules/pe-dlltool.mk
new file mode 100644
index 0000000..0fc1adf
--- /dev/null
+++ b/sofort/exrules/pe-dlltool.mk
@@ -0,0 +1,18 @@
+# pe-dlltool.mk: PE shared library rules for targets using dlltool.
+# this file is covered by COPYING.SOFORT.
+
+include $(PROJECT_DIR)/sofort/exrules/pe-common.mk
+
+$(IMPLIB_VER):		$(IMPLIB_DEF)
+			$(DLLTOOL) -l $(IMPLIB_VER) -d $(IMPLIB_DEF) -D $(DSO_VER)
+
+ifeq ($(AVOID_VERSION),yes)
+
+else
+
+$(IMPLIB_SONAME):	$(IMPLIB_DEF)
+			$(DLLTOOL) -l $(IMPLIB_SONAME) -d $(IMPLIB_DEF) -D $(DSO_SONAME)
+
+endif
+
+include $(PROJECT_DIR)/sofort/exrules/pe-version.mk
diff --git a/sofort/exrules/pe-mdso.mk b/sofort/exrules/pe-mdso.mk
new file mode 100644
index 0000000..0c380e0
--- /dev/null
+++ b/sofort/exrules/pe-mdso.mk
@@ -0,0 +1,11 @@
+# pe-mdso.mk: PE shared library rules for targets using mdso.
+# this file is covered by COPYING.SOFORT.
+
+include $(PROJECT_DIR)/sofort/exrules/pe-common.mk
+
+$(IMPLIB_VER):	$(IMPLIB_DEF)
+		$(MDSO) -m $(CC_BITS) -i $(IMPLIB_VER) -n $(DSO_VER) -l $(DSO_LIBPATH) $(IMPLIB_DEF)
+
+include $(PROJECT_DIR)/sofort/exrules/_pe/pe_mdso_version_$(VERSION_OPT).mk
+
+include $(PROJECT_DIR)/sofort/exrules/pe-version.mk
diff --git a/sofort/exrules/pe-version.mk b/sofort/exrules/pe-version.mk
new file mode 100644
index 0000000..7f5b658
--- /dev/null
+++ b/sofort/exrules/pe-version.mk
@@ -0,0 +1,4 @@
+# pe-version.mk: handling of PE shared library versioning schemes.
+# this file is covered by COPYING.SOFORT.
+
+include $(PROJECT_DIR)/sofort/exrules/_pe/pe_version_$(VERSION_OPT).mk
diff --git a/sofort/tools/pkgconf.sh b/sofort/tools/pkgconf.sh
new file mode 100755
index 0000000..a69c25b
--- /dev/null
+++ b/sofort/tools/pkgconf.sh
@@ -0,0 +1,136 @@
+#!/bin/sh
+
+# pkgconf.sh: generate a pkgconf manifest file.
+# this file is covered by COPYING.SOFORT.
+
+set -eu
+
+# prefix, exec_prefix
+if [ "$PKGCONF_PREFIX" = "$PKGCONF_EXEC_PREFIX" ]; then
+	pkgconf_prefix="${PKGCONF_PREFIX}"
+	pkgconf_exec_prefix='${prefix}'
+else
+	pkgconf_prefix="${PKGCONF_PREFIX}"
+	pkgconf_exec_prefix="${PKGCONF_EXEC_PREFIX}"
+fi
+
+
+# (relative) includedir
+if [ -z "$PKGCONF_INCLUDEDIR" ]; then
+	pkgconf_includedir=
+	pkgconf_cflags=
+else
+	prefix=$(dirname "$PKGCONF_INCLUDEDIR")
+	base=$(basename "$PKGCONF_INCLUDEDIR")
+
+	if [ "$prefix" = '/' ]; then
+		prefix=
+	fi
+
+	if [ "$prefix/$base" = "$PKGCONF_PREFIX/$base" ]; then
+		pkgconf_includedir='${prefix}/'"${base}"
+		pkgconf_cflags='-I${includedir}'
+	else
+		pkgconf_includedir="${PKGCONF_INCLUDEDIR}"
+		pkgconf_cflags='-I${includedir}'
+	fi
+fi
+
+
+# (relative) libdir (blank unless needed)
+if [ -z "$PKGCONF_LIBDIR" ]; then
+	pkgconf_libdir=
+else
+	prefix=$(dirname "$PKGCONF_LIBDIR")
+	base=$(basename "$PKGCONF_LIBDIR")
+
+	if [ "$prefix" = '/' ]; then
+		prefix=
+	fi
+
+	if [ "$prefix/$base" = "$PKGCONF_EXEC_PREFIX/$base" ]; then
+		pkgconf_libdir='${exec_prefix}/'"${base}"
+	else
+		pkgconf_libdir='${prefix}/'"${PKGCONF_LIBDIR}"
+	fi
+fi
+
+
+# ldflags (--libs)
+if [ -n "$pkgconf_libdir" ] &&  [ -n "${PKGCONF_NAME}" ]; then
+	pkgconf_ldflags='-L${libdir}'" -l${PKGCONF_NAME}"
+elif [ -n "${PKGCONF_NAME}" ]; then
+	pkgconf_ldflags="-l${PKGCONF_NAME}"
+else
+	pkgconf_ldflags='-L${libdir}'
+fi
+
+
+# cflags
+if [ -n "$pkgconf_cflags" ] || [ -n "${PKGCONF_DEFS}" ]; then
+	pkgconf_cflags="$pkgconf_cflags ${PKGCONF_DEFS}"
+	pkgconf_cflags=$(printf '%s' "$pkgconf_cflags" | sed -e 's/^[ \t]*//g')
+fi
+
+
+# repo (optional)
+if [ -z "${PKGCONF_REPO}" ]; then
+	pkgconf_repo='#'
+else
+	pkgconf_repo="Repo:        ${PKGCONF_REPO}"
+fi
+
+# patches (optional)
+if [ -z "${PKGCONF_PSRC}" ]; then
+	pkgconf_psrc='#'
+else
+	pkgconf_psrc="Patches:     ${PKGCONF_PSRC}"
+fi
+
+# distro (optional)
+if [ -z "${PKGCONF_DURL}" ]; then
+	pkgconf_durl='#'
+else
+	pkgconf_durl="Distro:      ${PKGCONF_DURL}"
+fi
+
+# bug reports (optional)
+if [ -z "${PKGCONF_BUGS}" ]; then
+	pkgconf_bugs='#'
+else
+	pkgconf_bugs="Bug reports: ${PKGCONF_BUGS}"
+fi
+
+# project home page (optional)
+if [ -z "${PKGCONF_HOME}" ]; then
+	pkgconf_home='#'
+else
+	pkgconf_home="Home page:   ${PKGCONF_HOME}"
+fi
+
+
+# output (without trailing spaces)
+cat << _EOF | grep -v '^#' | sed 's/[ \t]*$//'
+###
+prefix=$pkgconf_prefix
+exec_prefix=$pkgconf_exec_prefix
+includedir=$pkgconf_includedir
+libdir=$pkgconf_libdir
+
+Name:        ${PKGCONF_NAME}
+Description: ${PKGCONF_DESC}
+URL:         ${PKGCONF_USRC}
+Version:     ${PKGCONF_VERSION}
+$pkgconf_repo
+$pkgconf_psrc
+$pkgconf_durl
+$pkgconf_bugs
+$pkgconf_home
+
+Cflags:      $pkgconf_cflags
+Libs:        $pkgconf_ldflags
+###
+_EOF
+
+# all done
+exit 0
diff --git a/sofort/tools/srctree.sh b/sofort/tools/srctree.sh
new file mode 100755
index 0000000..90a1d89
--- /dev/null
+++ b/sofort/tools/srctree.sh
@@ -0,0 +1,83 @@
+#!/bin/sh
+
+# srctree.sh: support for out-of-tree builds in posix make mode.
+# this file is covered by COPYING.SOFORT.
+
+set -eu
+
+usage()
+{
+cat << EOF >&2
+
+Usage:
+  --help              show this HELP message
+  --srctree=SRCTREE   set source directory
+
+EOF
+exit 1
+}
+
+
+# one
+workdir=$(pwd -P)
+srctree=
+argloop=
+
+
+for arg ; do
+	case "$arg" in
+		--help)
+			usage
+			;;
+
+		--srctree=*)
+			srctree=${arg#*=}
+			;;
+
+		--)
+			argloop='done'
+			;;
+
+		*)
+			if [ -z "$argloop" ]; then
+				printf 'Invalid option: %s\n' "$arg" >&2
+				usage
+			fi
+			;;
+	esac
+done
+
+
+# two
+if [ -z "$srctree" ] ; then
+	usage
+fi
+
+cd -- "$srctree"
+srctree=$(pwd -P)
+cd -- "$workdir"
+
+if [ "$srctree" = "$workdir" ]; then
+	exit 0
+fi
+
+
+# three
+for arg ; do
+	case "$arg" in
+		--srctree=*)
+			;;
+
+		--)
+			;;
+
+		*)
+			stat "$arg" > /dev/null 2>&1 \
+				|| ln -s -- "$srctree/$arg" "$arg"
+			;;
+	esac
+done
+
+
+# all done
+exit 0
diff --git a/sofort/tools/version.sh b/sofort/tools/version.sh
new file mode 100755
index 0000000..8c49cb3
--- /dev/null
+++ b/sofort/tools/version.sh
@@ -0,0 +1,75 @@
+#!/bin/sh
+
+# version.sh: detect git repository info, output defs as a C header.
+# this file is covered by COPYING.SOFORT.
+
+set -eu
+
+usage()
+{
+cat << EOF >&2
+
+Usage:
+  -h            show this HELP message
+  -s  SRCDIR    set source directory
+  -o  OUTPUT    set output header
+  -p  PREFIX    set macro prefix
+
+EOF
+exit 1
+}
+
+
+# one
+workdir=$(pwd -P)
+srcdir=
+output=
+prefix=
+
+
+while getopts "hs:o:p:" opt; do
+	case $opt in
+	h)
+  		usage
+  		;;
+	s)
+    		srcdir="$OPTARG"
+    		;;
+	o)
+    		output="$OPTARG"
+    		;;
+	p)
+    		prefix="$OPTARG"
+    		;;
+	\?)
+		printf 'Invalid option: -%s' "$OPTARG" >&2
+    		usage
+    		;;
+	esac
+done
+
+
+# two
+if [ -z "$srcdir" ] || [ -z "$output" ] || [ -z "$prefix" ]; then
+	usage
+fi
+
+cd -- "$srcdir"
+
+gitver=$(git rev-parse --verify HEAD      2>/dev/null) || gitver="unknown"
+cvdate=$(git show -s --format=%ci $gitver 2>/dev/null) || cvdate=$(date)
+
+vmacro=$(printf '%s' "$prefix"'_GIT_VERSION' | tr '[:lower:]' '[:upper:]')
+dmacro=$(printf '%s' "$prefix"'_GIT_DATE   ' | tr '[:lower:]' '[:upper:]')
+
+cd -- "$workdir"
+
+
+# three
+printf '#define %s "%s"\n#define %s "%s"\n' \
+		"$vmacro" "$gitver" \
+		"$dmacro" "$cvdate" \
+	> "$output"
+
+# all done
+exit 0