| Pablo Neira Ayuso | 1450666 | 2014-02-20 18:43:15 +0100 | [diff] [blame] | 1 | |
| 2 | # GCC 4.x -fvisibility=hidden |
| 3 | |
| 4 | AC_DEFUN([CHECK_GCC_FVISIBILITY], [ |
| 5 | AC_LANG_PUSH([C]) |
| 6 | saved_CFLAGS="$CFLAGS" |
| 7 | CFLAGS="$saved_CFLAGS -fvisibility=hidden" |
| 8 | AC_CACHE_CHECK([whether compiler accepts -fvisibility=hidden], |
| 9 | [ac_cv_fvisibility_hidden], AC_COMPILE_IFELSE( |
| 10 | [AC_LANG_SOURCE()], |
| 11 | [ac_cv_fvisibility_hidden=yes], |
| 12 | [ac_cv_fvisibility_hidden=no] |
| 13 | )) |
| 14 | if test "$ac_cv_fvisibility_hidden" = "yes"; then |
| 15 | AC_DEFINE([HAVE_VISIBILITY_HIDDEN], [1], |
| 16 | [True if compiler supports -fvisibility=hidden]) |
| 17 | AC_SUBST([GCC_FVISIBILITY_HIDDEN], [-fvisibility=hidden]) |
| 18 | fi |
| 19 | CFLAGS="$saved_CFLAGS" |
| 20 | AC_LANG_POP([C]) |
| 21 | ]) |