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authormidipix <writeonce@midipix.org>2024-02-18 06:33:00 +0000
committermidipix <writeonce@midipix.org>2024-02-18 07:49:53 +0000
commite171b3874126c43168aef1c8ad0f578036a2512b (patch)
tree67dce33b2186cc31b046155c548a72c9f8991114 /sofort/cfgtest
parent7dec8ca0af32eae08ad6d2fa3b93731e5f9260de (diff)
downloadbautomake-e171b3874126c43168aef1c8ad0f578036a2512b.tar.bz2
bautomake-e171b3874126c43168aef1c8ad0f578036a2512b.tar.xz
build system: ccenv: detect compiler support of visibility attributes.
Diffstat (limited to 'sofort/cfgtest')
-rw-r--r--sofort/cfgtest/cfgtest.sh45
1 files changed, 45 insertions, 0 deletions
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