diff options
author | Ludovic Courtès <ludo@gnu.org> | 2008-08-21 22:23:59 +0200 |
---|---|---|
committer | Ludovic Courtès <ludo@gnu.org> | 2008-08-21 22:23:59 +0200 |
commit | 103dc4d4d297ed7522e36415869f60d81f9cbc5a (patch) | |
tree | fae864e72562f841ed95f3e5f36cc12b2de807c6 /build-aux | |
parent | 417566ebc9dc51fc65b490a96213059e17994dde (diff) |
Add Gnulib-provided files for convenience.
These come from Gnulib's Git commit
ae3a0d62f26d8156b403e40d6007475006f3136f, dated 2008-08-19.
Diffstat (limited to 'build-aux')
-rw-r--r-- | build-aux/link-warning.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/build-aux/link-warning.h b/build-aux/link-warning.h new file mode 100644 index 000000000..fda01941a --- /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 |