diff options
| -rw-r--r-- | configure.ac | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index d01d0f18846..f121002d4be 100644 --- a/configure.ac +++ b/configure.ac @@ -96,7 +96,14 @@ esac dnl Add flags for gcc and g++ if test "x$GCC" = xyes; then - CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -std=c99 -ffast-math -fvisibility=hidden" + CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -std=c99 -ffast-math" + + # Enable -fvisibility=hidden if using a gcc that supports it + save_CFLAGS="$CFLAGS" + AC_MSG_CHECKING([whether $(CC) supports -fvisibility=hidden]) + CFLAGS="$CFLAGS -fvisibility=hidden" + AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]), + [CFLAGS="$save_CFLAGS" ; AC_MSG_RESULT([no])]); # Work around aliasing bugs - developers should comment this out CFLAGS="$CFLAGS -fno-strict-aliasing" |