From bd7029a99b0c2974265c6665638ef14a052f42ab Mon Sep 17 00:00:00 2001 From: Thomas Guyot-Sionnest Date: Tue, 12 Feb 2008 11:07:18 +0000 Subject: Sync to latest Gnulib git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1925 f882894a-f735-0410-b71e-b25c423dba1c --- build-aux/link-warning.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 build-aux/link-warning.h (limited to 'build-aux/link-warning.h') diff --git a/build-aux/link-warning.h b/build-aux/link-warning.h new file mode 100644 index 00000000..fda01941 --- /dev/null +++ b/build-aux/link-warning.h @@ -0,0 +1,28 @@ +/* GL_LINK_WARNING("literal string") arranges to emit the literal string as + a linker warning on most glibc systems. + We use a linker warning rather than a preprocessor warning, because + #warning cannot be used inside macros. */ +#ifndef GL_LINK_WARNING + /* This works on platforms with GNU ld and ELF object format. + Testing __GLIBC__ is sufficient for asserting that GNU ld is in use. + Testing __ELF__ guarantees the ELF object format. + Testing __GNUC__ is necessary for the compound expression syntax. */ +# if defined __GLIBC__ && defined __ELF__ && defined __GNUC__ +# define GL_LINK_WARNING(message) \ + GL_LINK_WARNING1 (__FILE__, __LINE__, message) +# define GL_LINK_WARNING1(file, line, message) \ + GL_LINK_WARNING2 (file, line, message) /* macroexpand file and line */ +# define GL_LINK_WARNING2(file, line, message) \ + GL_LINK_WARNING3 (file ":" #line ": warning: " message) +# define GL_LINK_WARNING3(message) \ + ({ static const char warning[sizeof (message)] \ + __attribute__ ((__unused__, \ + __section__ (".gnu.warning"), \ + __aligned__ (1))) \ + = message "\n"; \ + (void)0; \ + }) +# else +# define GL_LINK_WARNING(message) ((void) 0) +# endif +#endif -- cgit v1.2.3