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Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 917a908718..8de53408ee 100644 --- a/configure.ac +++ b/configure.ac @@ -1787,6 +1787,26 @@ yes) CFLAGS_NODIST="$CFLAGS_NODIST -Werror=implicit-function-declaration" fi + AC_MSG_CHECKING(if we can use visibility in $CC) + ac_save_cc="$CC" + CC="$CC -fvisibility=hidden" + AC_CACHE_VAL(ac_cv_enable_visibility, + AC_COMPILE_IFELSE( + [ + AC_LANG_PROGRAM([[]], [[]]) + ],[ + ac_cv_enable_visibility=yes + ],[ + ac_cv_enable_visibility=no + ])) + CC="$ac_save_cc" + AC_MSG_RESULT($ac_cv_enable_visibility) + + if test $ac_cv_enable_visibility = yes + then + CFLAGS_NODIST="$CFLAGS_NODIST -fvisibility=hidden" + fi + # if using gcc on alpha, use -mieee to get (near) full IEEE 754 # support. Without this, treatment of subnormals doesn't follow # the standard. |