diff options
Diffstat (limited to 'source4/build/m4/check_cc.m4')
| -rw-r--r-- | source4/build/m4/check_cc.m4 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/source4/build/m4/check_cc.m4 b/source4/build/m4/check_cc.m4 index aa6c8752ed..7551b67b17 100644 --- a/source4/build/m4/check_cc.m4 +++ b/source4/build/m4/check_cc.m4 @@ -117,6 +117,25 @@ AC_TRY_RUN([#include "${srcdir-.}/build/tests/trivial.c"], AC_MSG_WARN([cannot run when cross-compiling])) # +# Check if the compiler support ELF visibility for symbols +# +if test x"$GCC" = x"yes" ; then + AX_CFLAGS_GCC_OPTION([-fvisibility=hidden], VISIBILITY_CFLAGS) +fi +if test -n "$VISIBILITY_CFLAGS"; then + OLD_CFLAGS="${CFLAGS}" + CFLAGS="${CFLAGS} ${VISIBILITY_CFLAGS} -D_PUBLIC_=__attribute__((visibility(\"default\")))" + VISIBILITY_CFLAGS="${VISIBILITY_CFLAGS} -D_PUBLIC_=\"__attribute__((visibility(\\\"default\\\")))\"" + AC_MSG_CHECKING([that the C compiler can use the VISIBILITY_CFLAGS]) + AC_TRY_RUN([ + _PUBLIC_ void vis_foo1(void) {} + __attribute__((visibility("default"))) void vis_foo2(void) {} + #include "${srcdir-.}/build/tests/trivial.c" + ], AC_MSG_RESULT(yes), [AC_MSG_RESULT(no);VISIBILITY_CFLAGS=""]) + CFLAGS="${OLD_CFLAGS}" +fi + +# # Check if the compiler can handle the options we selected by # --enable-*developer # |