diff options
author | Didier Raboud <odyx@debian.org> | 2019-09-13 17:56:14 +0200 |
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committer | Didier Raboud <odyx@debian.org> | 2019-09-13 17:56:14 +0200 |
commit | b38516f13a1f563aa1eb7faf80965755ac63e3e6 (patch) | |
tree | fd60cd4095a45f7327d28dfe04bbfb34b7d7215a /m4/visibility.m4 | |
parent | e50542121e724e851fc5d6c68bb773f80c0bc12c (diff) |
New upstream version 5.3.3
Diffstat (limited to 'm4/visibility.m4')
-rw-r--r-- | m4/visibility.m4 | 49 |
1 files changed, 12 insertions, 37 deletions
diff --git a/m4/visibility.m4 b/m4/visibility.m4 index 552e397..2ff6330 100644 --- a/m4/visibility.m4 +++ b/m4/visibility.m4 @@ -1,5 +1,5 @@ -# visibility.m4 serial 5 (gettext-0.18.2) -dnl Copyright (C) 2005, 2008, 2010-2014 Free Software Foundation, Inc. +# visibility.m4 serial 1 (gettext-0.15) +dnl Copyright (C) 2005 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -12,7 +12,7 @@ dnl __attribute__((__visibility__("hidden"))) and dnl __attribute__((__visibility__("default"))). dnl Does *not* test for __visibility__("protected") - which has tricky dnl semantics (see the 'vismain' test in glibc) and does not exist e.g. on -dnl Mac OS X. +dnl MacOS X. dnl Does *not* test for __visibility__("internal") - which has processor dnl dependent semantics. dnl Does *not* test for #pragma GCC visibility push(hidden) - which is @@ -26,43 +26,18 @@ AC_DEFUN([gl_VISIBILITY], CFLAG_VISIBILITY= HAVE_VISIBILITY=0 if test -n "$GCC"; then - dnl First, check whether -Werror can be added to the command line, or - dnl whether it leads to an error because of some other option that the - dnl user has put into $CC $CFLAGS $CPPFLAGS. - AC_MSG_CHECKING([whether the -Werror option is usable]) - AC_CACHE_VAL([gl_cv_cc_vis_werror], [ - gl_save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS -Werror" - AC_COMPILE_IFELSE( - [AC_LANG_PROGRAM([[]], [[]])], - [gl_cv_cc_vis_werror=yes], - [gl_cv_cc_vis_werror=no]) - CFLAGS="$gl_save_CFLAGS"]) - AC_MSG_RESULT([$gl_cv_cc_vis_werror]) - dnl Now check whether visibility declarations are supported. AC_MSG_CHECKING([for simple visibility declarations]) - AC_CACHE_VAL([gl_cv_cc_visibility], [ + AC_CACHE_VAL(gl_cv_cc_visibility, [ gl_save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -fvisibility=hidden" - dnl We use the option -Werror and a function dummyfunc, because on some - dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning - dnl "visibility attribute not supported in this configuration; ignored" - dnl at the first function definition in every compilation unit, and we - dnl don't want to use the option in this case. - if test $gl_cv_cc_vis_werror = yes; then - CFLAGS="$CFLAGS -Werror" - fi - AC_COMPILE_IFELSE( - [AC_LANG_PROGRAM( - [[extern __attribute__((__visibility__("hidden"))) int hiddenvar; - extern __attribute__((__visibility__("default"))) int exportedvar; - extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void); - extern __attribute__((__visibility__("default"))) int exportedfunc (void); - void dummyfunc (void) {} - ]], - [[]])], - [gl_cv_cc_visibility=yes], - [gl_cv_cc_visibility=no]) + AC_TRY_COMPILE( + [extern __attribute__((__visibility__("hidden"))) int hiddenvar; + extern __attribute__((__visibility__("default"))) int exportedvar; + extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void); + extern __attribute__((__visibility__("default"))) int exportedfunc (void);], + [], + gl_cv_cc_visibility=yes, + gl_cv_cc_visibility=no) CFLAGS="$gl_save_CFLAGS"]) AC_MSG_RESULT([$gl_cv_cc_visibility]) if test $gl_cv_cc_visibility = yes; then |