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| author | Reini Urban <rurban@cpan.org> | 2019-10-23 16:12:46 +0200 |
|---|---|---|
| committer | Reini Urban <rurban@cpan.org> | 2019-10-23 16:15:29 +0200 |
| commit | f0cef5ff5bf9ba5f0b2a25f87322c7cebac43849 (patch) | |
| tree | 1ed5ef870ee359ab5576db9594ab7a9f78893218 /m4/ax_gcc_func_attribute.m4 | |
| parent | 62e8491dbc174113a04fe910cad1e92e8a9e2164 (diff) | |
| download | autoconf-archive-f0cef5ff5bf9ba5f0b2a25f87322c7cebac43849.tar.gz | |
add AX_GCC_FUNC_ATTRIBUTE(gnu_format)
newer gcc warns about function might be a candidate for
gnu_printf format attribute [-Wsuggest-attribute=format]
Usage: AX_GCC_FUNC_ATTRIBUTE(gnu_format)
and:
#ifdef HAVE_FUNC_ATTRIBUTE_GNU_FORMAT
__attribute__ ((format (gnu_printf, 1, 2)))
#elif HAVE_FUNC_ATTRIBUTE_FORMAT
__attribute__ ((format (printf, 1, 2)))
#endif
Diffstat (limited to 'm4/ax_gcc_func_attribute.m4')
| -rw-r--r-- | m4/ax_gcc_func_attribute.m4 | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/m4/ax_gcc_func_attribute.m4 b/m4/ax_gcc_func_attribute.m4 index 098c9aa..c926439 100644 --- a/m4/ax_gcc_func_attribute.m4 +++ b/m4/ax_gcc_func_attribute.m4 @@ -42,6 +42,7 @@ # flatten # format # format_arg +# gnu_format # gnu_inline # hot # ifunc @@ -77,7 +78,7 @@ # and this notice are preserved. This file is offered as-is, without any # warranty. -#serial 9 +#serial 10 AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [ AS_VAR_PUSHDEF([ac_var], [ax_cv_have_func_attribute_$1]) @@ -140,6 +141,9 @@ AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [ [format], [ int foo(const char *p, ...) __attribute__(($1(printf, 1, 2))); ], + [gnu_format], [ + int foo(const char *p, ...) __attribute__((format(gnu_printf, 1, 2))); + ], [format_arg], [ char *foo(const char *p) __attribute__(($1(1))); ], |