summaryrefslogtreecommitdiff
path: root/libgcc/configure.ac
diff options
context:
space:
mode:
Diffstat (limited to 'libgcc/configure.ac')
-rw-r--r--libgcc/configure.ac292
1 files changed, 292 insertions, 0 deletions
diff --git a/libgcc/configure.ac b/libgcc/configure.ac
new file mode 100644
index 000000000..7dbe114e3
--- /dev/null
+++ b/libgcc/configure.ac
@@ -0,0 +1,292 @@
+dnl Process this file with autoconf to produce a configure script.
+
+sinclude(../config/enable.m4)
+sinclude(../config/tls.m4)
+sinclude(../config/acx.m4)
+sinclude(../config/no-executables.m4)
+sinclude(../config/override.m4)
+sinclude(../config/dfp.m4)
+
+AC_PREREQ(2.64)
+AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
+AC_CONFIG_SRCDIR([static-object.mk])
+
+AC_ARG_WITH(target-subdir,
+[ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
+AC_ARG_WITH(cross-host,
+[ --with-cross-host=HOST Configuring with a cross compiler])
+AC_ARG_WITH(ld,
+[ --with-ld arrange to use the specified ld (full pathname)])
+
+if test "${srcdir}" = "."; then
+ if test -n "${with_build_subdir}"; then
+ libgcc_topdir="${srcdir}/../.."
+ with_target_subdir=
+ elif test -z "${with_target_subdir}"; then
+ libgcc_topdir="${srcdir}/.."
+ else
+ if test "${with_target_subdir}" != "."; then
+ libgcc_topdir="${srcdir}/${with_multisrctop}../.."
+ else
+ libgcc_topdir="${srcdir}/${with_multisrctop}.."
+ fi
+ fi
+else
+ libgcc_topdir="${srcdir}/.."
+fi
+AC_SUBST(libgcc_topdir)
+AC_CONFIG_AUX_DIR($libgcc_topdir)
+
+AC_ARG_ENABLE(shared,
+[ --disable-shared don't provide a shared libgcc],
+[
+ case $enable_shared in
+ yes | no) ;;
+ *)
+ enable_shared=no
+ IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
+ for pkg in $enableval; do
+ if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
+ enable_shared=yes
+ fi
+ done
+ IFS="$ac_save_ifs"
+ ;;
+ esac
+], [enable_shared=yes])
+AC_SUBST(enable_shared)
+
+AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
+AC_ARG_ENABLE(version-specific-runtime-libs,
+[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
+[case "$enableval" in
+ yes) version_specific_libs=yes ;;
+ no) version_specific_libs=no ;;
+ *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
+ esac],
+[version_specific_libs=no])
+AC_MSG_RESULT($version_specific_libs)
+
+AC_ARG_WITH(slibdir,
+[ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
+slibdir="$with_slibdir",
+if test "${version_specific_libs}" = yes; then
+ slibdir='$(libsubdir)'
+elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
+ slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
+else
+ slibdir='$(libdir)'
+fi)
+AC_SUBST(slibdir)
+
+# Command-line options.
+# Very limited version of AC_MAINTAINER_MODE.
+AC_ARG_ENABLE([maintainer-mode],
+ [AC_HELP_STRING([--enable-maintainer-mode],
+ [enable make rules and dependencies not useful (and
+ sometimes confusing) to the casual installer])],
+ [case ${enable_maintainer_mode} in
+ yes) MAINT='' ;;
+ no) MAINT='#' ;;
+ *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
+ esac
+ maintainer_mode=${enableval}],
+ [MAINT='#'])
+AC_SUBST([MAINT])dnl
+
+AC_PROG_INSTALL
+
+AC_PROG_AWK
+# We need awk; bail out if it's missing.
+case ${AWK} in
+ "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
+esac
+
+AC_CANONICAL_HOST
+ACX_NONCANONICAL_HOST
+ACX_NONCANONICAL_TARGET
+GCC_TOPLEV_SUBDIRS
+
+# Calculate toolexeclibdir
+# Also toolexecdir, though it's only used in toolexeclibdir
+case ${version_specific_libs} in
+ yes)
+ # Need the gcc compiler version to know where to install libraries
+ # and header files if --enable-version-specific-runtime-libs option
+ # is selected.
+ toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
+ toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
+ ;;
+ no)
+ if test -n "$with_cross_host" &&
+ test x"$with_cross_host" != x"no"; then
+ # Install a library built with a cross compiler in tooldir, not libdir.
+ toolexecdir='$(exec_prefix)/$(target_noncanonical)'
+ toolexeclibdir='$(toolexecdir)/lib'
+ else
+ toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
+ toolexeclibdir='$(libdir)'
+ fi
+ multi_os_directory=`$CC -print-multi-os-directory`
+ case $multi_os_directory in
+ .) ;; # Avoid trailing /.
+ *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
+ esac
+ ;;
+esac
+AC_SUBST(toolexecdir)
+AC_SUBST(toolexeclibdir)
+
+dnl These must be called before AM_PROG_LIBTOOL, because it may want
+dnl to call AC_CHECK_PROG.
+AC_CHECK_TOOL(AR, ar)
+AC_CHECK_TOOL(LIPO, lipo, :)
+AC_CHECK_TOOL(NM, nm)
+AC_CHECK_TOOL(RANLIB, ranlib, :)
+AC_CHECK_TOOL(STRIP, strip, :)
+AC_PROG_LN_S
+
+GCC_NO_EXECUTABLES
+AC_PROG_CC
+AC_PROG_CPP_WERROR
+
+# Check for decimal float support.
+AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
+ [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
+ [libgcc_cv_dfp=no])])
+decimal_float=$libgcc_cv_dfp
+AC_SUBST(decimal_float)
+
+GCC_AC_ENABLE_DECIMAL_FLOAT([$host])
+
+# Check for fixed-point support.
+AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
+ [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
+ [libgcc_cv_fixed_point=no])])
+fixed_point=$libgcc_cv_fixed_point
+AC_SUBST(fixed_point)
+
+# Check for assembler CFI support.
+AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
+ [AC_COMPILE_IFELSE(
+[asm("\n\
+ .text\n\
+ .cfi_startproc\n\
+ .cfi_personality 0, symbol\n\
+ .cfi_endproc");],
+ [libgcc_cv_cfi=yes],
+ [libgcc_cv_cfi=no])])
+
+# Check 32bit or 64bit for x86.
+case ${host} in
+i?86*-*-* | x86_64*-*-*)
+ cat > conftest.c <<EOF
+#ifdef __x86_64__
+host_address=64
+#else
+host_address=32
+#endif
+EOF
+ eval `${CC-cc} -E conftest.c | grep host_address=`
+ rm -f conftest.c
+ ;;
+esac
+
+# Collect host-machine-specific information.
+. ${srcdir}/config.host
+
+# Check if Solaris/x86 linker supports ZERO terminator unwind entries.
+# This is after config.host so we can augment tmake_file.
+# Link with -nostartfiles -nodefaultlibs since neither are present while
+# building libgcc.
+case ${host} in
+i?86-*-solaris2*)
+ cat > conftest.s <<EOF
+ .section .eh_frame,"a",@unwind
+ .zero 4
+ .section .jcr,"aw",@progbits
+ .zero 8
+EOF
+ if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
+ # configure expects config files in libgcc/config, so need a relative
+ # path here.
+ tmake_file="${tmake_file} ../../gcc/config/i386/t-crtstuff"
+ fi
+ ;;
+esac
+
+# Check for visibility support. This is after config.host so that
+# we can check for asm_hidden_op.
+AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
+ libgcc_cv_hidden_visibility_attribute, [
+ echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
+ libgcc_cv_hidden_visibility_attribute=no
+ if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
+ if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
+ libgcc_cv_hidden_visibility_attribute=yes
+ fi
+ fi
+ rm -f conftest.*
+ ])
+
+if test $libgcc_cv_hidden_visibility_attribute = yes; then
+ vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
+else
+ vis_hide=
+fi
+AC_SUBST(vis_hide)
+
+# See if we have thread-local storage. We can only test assembler
+# sicne link-time and run-time tests require the newly built
+# gcc, which can't be used to build executable due to that libgcc
+# is yet to be built here.
+GCC_CHECK_CC_TLS
+set_have_cc_tls=
+if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
+ set_have_cc_tls="-DHAVE_CC_TLS"
+fi
+AC_SUBST(set_have_cc_tls)
+
+# See if we have emulated thread-local storage.
+GCC_CHECK_EMUTLS
+set_use_emutls=
+if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
+ set_use_emutls="-DUSE_EMUTLS"
+fi
+AC_SUBST(set_use_emutls)
+
+# Conditionalize the makefile for this target machine.
+tmake_file_=
+for f in ${tmake_file}
+do
+ if test -f ${srcdir}/config/$f
+ then
+ tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
+ fi
+done
+tmake_file="${tmake_file_}"
+AC_SUBST(tmake_file)
+
+# Substitute configuration variables
+AC_SUBST(extra_parts)
+AC_SUBST(asm_hidden_op)
+
+# We need multilib support.
+AC_CONFIG_FILES([Makefile])
+AC_CONFIG_COMMANDS([default],
+ [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
+if test -n "$CONFIG_FILES"; then
+ # FIXME: We shouldn't need to set ac_file
+ ac_file=Makefile
+ . ${libgcc_topdir}/config-ml.in
+fi]],
+[[srcdir=${srcdir}
+host=${host}
+with_target_subdir=${with_target_subdir}
+with_multisubdir=${with_multisubdir}
+ac_configure_args="--enable-multilib ${ac_configure_args}"
+CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
+libgcc_topdir=${libgcc_topdir}
+CC="${CC}"
+]])
+AC_OUTPUT