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authormidipix <writeonce@midipix.org>2024-02-18 06:33:00 +0000
committermidipix <writeonce@midipix.org>2024-02-18 07:49:54 +0000
commit2bfe813388acc0cbfe6f6178c9da4c5884ecbdcc (patch)
treeb719dca99bb2e72475eef23b1a8ad84b88230621 /sofort
parentec521c5248300e06e6223f0c59e063c422b5153a (diff)
downloadntux-2bfe813388acc0cbfe6f6178c9da4c5884ecbdcc.tar.bz2
ntux-2bfe813388acc0cbfe6f6178c9da4c5884ecbdcc.tar.xz
build system: ccenv: detect compiler support of visibility attributes.
Diffstat (limited to 'sofort')
-rw-r--r--sofort/ccenv/ccenv.in7
-rw-r--r--sofort/ccenv/ccenv.sh20
-rw-r--r--sofort/ccenv/ccenv.vars6
-rw-r--r--sofort/cfgtest/cfgtest.sh45
4 files changed, 77 insertions, 1 deletions
diff --git a/sofort/ccenv/ccenv.in b/sofort/ccenv/ccenv.in
index 441f8ab..0daff84 100644
--- a/sofort/ccenv/ccenv.in
+++ b/sofort/ccenv/ccenv.in
@@ -84,8 +84,13 @@ PKGCONF = @ccenv_pkgconf@
AS = @ccenv_as@
LD = @ccenv_ld@
+# @ccenv_cfgtype@ visibility attributes
+CFLAGS_ATTR_VISIBILITY_DEFAULT = -D_ATTR_VISIBILITY_DEFAULT=@ccenv_attr_visibility_default@
+CFLAGS_ATTR_VISIBILITY_HIDDEN = -D_ATTR_VISIBILITY_HIDDEN=@ccenv_attr_visibility_hidden@
+CFLAGS_ATTR_VISIBILITY_INTERNAL = -D_ATTR_VISIBILITY_INTERNAL=@ccenv_attr_visibility_internal@
+CFLAGS_ATTR_VISIBILITY_PROTECTED = -D_ATTR_VISIBILITY_PROTECTED=@ccenv_attr_visibility_protected@
+
# @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
index a13aa07..0f7f486 100644
--- a/sofort/ccenv/ccenv.sh
+++ b/sofort/ccenv/ccenv.sh
@@ -1654,6 +1654,25 @@ ccenv_set_cc_linker_switch_vars()
done
}
+ccenv_set_cc_attr_visibility_vars()
+{
+ if cfgtest_attr_visibility 'default'; then
+ ccenv_attr_visibility_default="$mb_cfgtest_attr"
+ fi
+
+ if cfgtest_attr_visibility 'hidden'; then
+ ccenv_attr_visibility_hidden="$mb_cfgtest_attr"
+ fi
+
+ if cfgtest_attr_visibility 'internal'; then
+ ccenv_attr_visibility_internal="$mb_cfgtest_attr"
+ fi
+
+ if cfgtest_attr_visibility 'protected'; then
+ ccenv_attr_visibility_protected="$mb_cfgtest_attr"
+ fi
+}
+
ccenv_dso_verify()
{
ccenv_str='int foo(int x){return ++x;}'
@@ -1760,6 +1779,7 @@ ccenv_set_toolchain_variables()
ccenv_set_os_dso_linkage
ccenv_set_os_dso_patterns
ccenv_set_os_pe_switches
+ ccenv_set_cc_attr_visibility_vars
ccenv_output_defs
ccenv_clean_up
diff --git a/sofort/ccenv/ccenv.vars b/sofort/ccenv/ccenv.vars
index 41eb327..054b638 100644
--- a/sofort/ccenv/ccenv.vars
+++ b/sofort/ccenv/ccenv.vars
@@ -82,6 +82,12 @@ ccenv_windrc=
ccenv_pkgconf=
+# visibility attributes
+ccenv_attr_visibility_default=
+ccenv_attr_visibility_hidden=
+ccenv_attr_visibility_internal=
+ccenv_attr_visibility_protected=
+
# cflags
ccenv_cflags_os=
ccenv_cflags_pic=
diff --git a/sofort/cfgtest/cfgtest.sh b/sofort/cfgtest/cfgtest.sh
index debdb8c..6abbfea 100644
--- a/sofort/cfgtest/cfgtest.sh
+++ b/sofort/cfgtest/cfgtest.sh
@@ -15,6 +15,7 @@
# 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
+# mb_cfgtest_attr: if supported, the compiler-specific attribute definition
cfgtest_newline()
@@ -131,6 +132,15 @@ cfgtest_epilog()
return 1
fi
+ if [ "${1}" = 'attr' ] && [ "${2}" = '(error)' ]; then
+ printf '\n\ncfgtest: the %s compiler %s %s_ attribute.\n' \
+ "$mb_cfgtest_cfgtype" \
+ 'does not appear to support the _' \
+ "${3}" >&3
+ printf '%s\n' '------------------------' >&3
+ return 1
+ fi
+
if [ "${2}" = '-----' ] || [ "${2}" = '(missing)' ]; then
printf '\n\ncfgtest: %s %s is missing or cannot be found.\n' "${1}" "${3}" >&3
printf '%s\n' '------------------------' >&3
@@ -246,6 +256,8 @@ cfgtest_common_init()
fi
elif [ "$cfgtest_type" = 'asm' ]; then
cfgtest_fmt='%s -c -xc - -o a.out'
+ elif [ "$cfgtest_type" = 'attr' ]; then
+ cfgtest_fmt='%s -c -xc - -o a.out -Werror'
elif [ "$cfgtest_type" = 'lib' ]; then
cfgtest_fmt='%s -xc - -o a.out'
elif [ "$cfgtest_type" = 'ldflag' ]; then
@@ -534,6 +546,39 @@ cfgtest_type_size()
}
+cfgtest_attr_visibility()
+{
+ # init
+ cfgtest_prolog 'compiler visibility attr' "${1}"
+
+ cfgtest_attr_syntax='__attribute__((__visibility__("'"${1}"'")))'
+ cfgtest_code_snippet="$cfgtest_attr_syntax"' int f_'"${1}"'(void);'
+
+ cfgtest_common_init 'attr'
+
+ # execute
+ cfgtest_ret=1
+
+ printf '%s' "$cfgtest_src" \
+ | eval $(printf '%s' "$cfgtest_cmd") \
+ > /dev/null 2>&3 \
+ || cfgtest_epilog 'attr' '(error)' "${1}" \
+ || return
+
+ # result
+ mb_cfgtest_attr=$(printf '__attribute__\\(\\(__visibility__\\(\\"%s\\"\\)\\)\\)' "${1}")
+
+ cfgtest_ret=0
+
+ printf 'cfgtest: %s compiler: above attribute is supported; see also ccenv/%s.mk.\n\n' \
+ "$mb_cfgtest_cfgtype" "$mb_cfgtest_cfgtype" >&3
+
+ cfgtest_epilog 'attr' '(ok)'
+
+ return 0
+}
+
+
cfgtest_code_snippet_asm()
{
# init