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configure: detect more function attributes

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This commit is contained in:
Evgeny Grin (Karlson2k)
2024-05-16 15:27:29 +02:00
parent 98c94f3b26
commit 647502b6e7
1 changed files with 85 additions and 0 deletions
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configure.ac
+85
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@@ -3267,6 +3267,69 @@ MHD_CHECK_FUNC([[nanosleep]], [[#include <time.h>]], [[struct timespec ts2, ts1
# NOTE: require setting of errattr_CFLAGS above
CFLAGS="${CFLAGS_ac} ${user_CFLAGS} ${errattr_CFLAGS}"
AC_CACHE_CHECK([whether $CC supports __attribute__((used))],[mhd_cv_cc_attr_used],
[
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
extern __attribute__((used)) int
test_func(void);
extern __attribute__((used)) int
test_func(void) {return 0;}
]])
],
[mhd_cv_cc_attr_used="yes"],[mhd_cv_cc_attr_used="no"]
)
]
)
AS_VAR_IF([mhd_cv_cc_attr_used],["yes"],
[
AC_DEFINE([HAVE_ATTR_USED],[1],
[Define to '1' if your compiler supports __attribute__((used))]
)
]
)
AC_CACHE_CHECK([whether $CC supports __attribute__((pure))],[mhd_cv_cc_attr_pure],
[
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
extern __attribute__((pure)) int
test_func(const char *ptr);
extern __attribute__((pure)) int
test_func(const char *ptr) {return (0 == (*ptr));}
]])
],
[mhd_cv_cc_attr_pure="yes"],[mhd_cv_cc_attr_pure="no"]
)
]
)
AS_VAR_IF([mhd_cv_cc_attr_pure],["yes"],
[
AC_DEFINE([HAVE_ATTR_PURE],[1],
[Define to '1' if your compiler supports __attribute__((pure))]
)
]
)
AC_CACHE_CHECK([whether $CC supports __attribute__((const))],[mhd_cv_cc_attr_const],
[
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
extern __attribute__((const)) int
test_func(int a);
extern __attribute__((const)) int
test_func(int a) {return a + 1;}
]])
],
[mhd_cv_cc_attr_const="yes"],[mhd_cv_cc_attr_const="no"]
)
]
)
AS_VAR_IF([mhd_cv_cc_attr_const],["yes"],
[
AC_DEFINE([HAVE_ATTR_CONST],[1],
[Define to '1' if your compiler supports __attribute__((const))]
)
]
)
AC_CACHE_CHECK([whether $CC supports __attribute__((visibility("default")))],[mhd_cv_cc_attr_visibility_default],
[
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
@@ -3287,6 +3350,28 @@ AS_VAR_IF([mhd_cv_cc_attr_visibility_default],["yes"],
[Define to '1' if your compiler supports __attribute__((visibility("default")))]
)
AC_CACHE_CHECK([whether $CC supports __attribute__((visibility("internal")))],[mhd_cv_cc_attr_visibility_internal],
[
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
__attribute__((visibility("internal"))) int
test_extrn_func(void);
__attribute__((visibility("internal"))) int
test_extrn_func(void) {return 0;}
]])
],
[mhd_cv_cc_attr_visibility_internal="yes"],[mhd_cv_cc_attr_visibility_internal="no"]
)
]
)
AS_VAR_IF([mhd_cv_cc_attr_visibility_internal],["yes"],
[
AC_DEFINE([HAVE_ATTR_VISIBILITY_INTERNAL],[1],
[Define to '1' if your compiler supports __attribute__((visibility("internal")))]
)
]
)
CFLAGS="${user_CFLAGS}"
MHD_CHECK_CC_CFLAG([-fvisibility=hidden],[CFLAGS_ac],
[