From 18f6835edaf7d640a2c9e476cb1babdbdadbfd9b Mon Sep 17 00:00:00 2001 From: Ton Voon Date: Thu, 17 Jun 2010 10:16:43 +0100 Subject: Added state retention APIs. Implemented for check_snmp with --rate option. See http://nagiosplugin.org/c-api-private for more details on the API. Also updated check_snmp -l option to change the perfdata label. --- gl/m4/visibility.m4 | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) (limited to 'gl/m4/visibility.m4') diff --git a/gl/m4/visibility.m4 b/gl/m4/visibility.m4 index 6d3f9c9d..077c4765 100644 --- a/gl/m4/visibility.m4 +++ b/gl/m4/visibility.m4 @@ -1,4 +1,4 @@ -# visibility.m4 serial 2 (gettext-0.18) +# visibility.m4 serial 3 (gettext-0.18) dnl Copyright (C) 2005, 2008-2010 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -26,15 +26,37 @@ 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="$CFLAGS -Werror" + AC_TRY_COMPILE([], [], + [gl_cv_cc_vis_werror=yes], + [gl_cv_cc_vis_werror=no]) + CFLAGS="$gl_save_CFLAGS"]) + AC_MSG_RESULT([$gl_cv_cc_vis_werror]) + dnl Now check whether visibility declarations are supported. AC_MSG_CHECKING([for simple visibility declarations]) AC_CACHE_VAL([gl_cv_cc_visibility], [ gl_save_CFLAGS="$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_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);], + extern __attribute__((__visibility__("default"))) int exportedfunc (void); + void dummyfunc (void) {}], [], [gl_cv_cc_visibility=yes], [gl_cv_cc_visibility=no]) -- cgit v1.2.3-74-g34f1