diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index b863220a..5add902e 100644 --- a/configure.ac +++ b/configure.ac @@ -292,6 +292,39 @@ AC_SUBST(GLIBSRC) AC_MSG_RESULT([$GLIBSRC]) dnl +dnl Check for -fvisibility=hidden to determine if we can do GNU-style +dnl visibility attributes for symbol export control +dnl +GI_HIDDEN_VISIBILITY_CFLAGS="" +case "$host" in + *-*-mingw*) + dnl on mingw32 we do -fvisibility=hidden and __declspec(dllexport) + AC_DEFINE([_GI_EXTERN], [__attribute__((visibility("default"))) __declspec(dllexport) extern], + [defines how to decorate public symbols while building]) + CFLAGS="${CFLAGS} -fvisibility=hidden" + ;; + *) + dnl on other compilers, check if we can do -fvisibility=hidden + SAVED_CFLAGS="${CFLAGS}" + CFLAGS="-fvisibility=hidden" + AC_MSG_CHECKING([for -fvisibility=hidden compiler flag]) + AC_TRY_COMPILE([], [int main (void) { return 0; }], + AC_MSG_RESULT(yes) + enable_fvisibility_hidden=yes, + AC_MSG_RESULT(no) + enable_fvisibility_hidden=no) + CFLAGS="${SAVED_CFLAGS}" + + AS_IF([test "${enable_fvisibility_hidden}" = "yes"], [ + AC_DEFINE([_GI_EXTERN], [__attribute__((visibility("default"))) extern], + [defines how to decorate public symbols while building]) + GI_HIDDEN_VISIBILITY_CFLAGS="-fvisibility=hidden" + ]) + ;; +esac +AC_SUBST(GI_HIDDEN_VISIBILITY_CFLAGS) + +dnl dnl Check for -Bsymbolic-functions linker flag used to avoid dnl intra-library PLT jumps, if available. dnl |