| |
| # GCC 4.x -fvisibility=hidden |
| |
| AC_DEFUN([CHECK_GCC_FVISIBILITY], [ |
| AC_LANG_PUSH([C]) |
| saved_CFLAGS="$CFLAGS" |
| CFLAGS="$saved_CFLAGS -fvisibility=hidden" |
| AC_CACHE_CHECK([whether compiler accepts -fvisibility=hidden], |
| [ac_cv_fvisibility_hidden], AC_COMPILE_IFELSE( |
| [AC_LANG_SOURCE()], |
| [ac_cv_fvisibility_hidden=yes], |
| [ac_cv_fvisibility_hidden=no] |
| )) |
| if test "$ac_cv_fvisibility_hidden" = "yes"; then |
| AC_DEFINE([HAVE_VISIBILITY_HIDDEN], [1], |
| [True if compiler supports -fvisibility=hidden]) |
| AC_SUBST([GCC_FVISIBILITY_HIDDEN], [-fvisibility=hidden]) |
| fi |
| CFLAGS="$saved_CFLAGS" |
| AC_LANG_POP([C]) |
| ]) |
