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cmake: Check for weak attribute

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Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This commit is contained in:
Andreas Schneider
2022-08-30 19:35:00 +02:00
parent e5af9524e3
commit 23546e354c
2 changed files with 18 additions and 0 deletions
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17
ConfigureChecks.cmake
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@ -375,6 +375,23 @@ int main(void) {
return 0; return 0;
}" HAVE_FALLTHROUGH_ATTRIBUTE) }" HAVE_FALLTHROUGH_ATTRIBUTE)
check_c_source_compiles("
#define WEAK __attribute__((weak))
WEAK int sum(int a, int b)
{
return a + b;
}
int main(void)
{
int i = sum(2, 2);
(void)i;
return 0;
}" HAVE_WEAK_ATTRIBUTE)
if (NOT WIN32) if (NOT WIN32)
check_c_source_compiles(" check_c_source_compiles("
#define __unused __attribute__((unused)) #define __unused __attribute__((unused))

1
config.h.cmake
View File

@ -225,6 +225,7 @@
#cmakedefine HAVE_FALLTHROUGH_ATTRIBUTE 1 #cmakedefine HAVE_FALLTHROUGH_ATTRIBUTE 1
#cmakedefine HAVE_UNUSED_ATTRIBUTE 1 #cmakedefine HAVE_UNUSED_ATTRIBUTE 1
#cmakedefine HAVE_WEAK_ATTRIBUTE 1
#cmakedefine HAVE_CONSTRUCTOR_ATTRIBUTE 1 #cmakedefine HAVE_CONSTRUCTOR_ATTRIBUTE 1
#cmakedefine HAVE_DESTRUCTOR_ATTRIBUTE 1 #cmakedefine HAVE_DESTRUCTOR_ATTRIBUTE 1