diff options
Diffstat (limited to 'm4/macros/check_varargs_macros.m4')
| -rw-r--r-- | m4/macros/check_varargs_macros.m4 | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/m4/macros/check_varargs_macros.m4 b/m4/macros/check_varargs_macros.m4 new file mode 100644 index 000000000000..44bd3edf1989 --- /dev/null +++ b/m4/macros/check_varargs_macros.m4 @@ -0,0 +1,39 @@ +dnl ###################################################################### +dnl check if compiler can handle variable-length argument macros +AC_DEFUN([AMU_VARARGS_MACROS], +[ +AC_CACHE_CHECK(if compiler can handle variable-length macros, +ac_cv_varargs_macros, +[ +# try C99 style +AC_TRY_COMPILE( +[ +#define foo(str,size,fmt,...) bar(__FILE__,__LINE__,(str),(size),(fmt),__VA_ARGS__) +], +[ +char a[80]; +foo(a, sizeof(a), "%d,%d", 1, 2); +], ac_cv_varargs_macros=c99, +# else try gcc style +AC_TRY_COMPILE( +[ +#define foo(str,size,args...) bar(__FILE__,__LINE__,(str),(size),(fmt),args) +], +[ +char a[80]; +foo(a, sizeof(a), "%d,%d", 1, 2); +], ac_cv_varargs_macros=gcc, ac_cv_varargs_macros=none)) +]) +if test "$ac_cv_varargs_macros" = c99 +then + AC_DEFINE(HAVE_C99_VARARGS_MACROS, 1, + [System supports C99-style variable-length argument macros]) +else + if test "$ac_cv_varargs_macros" = gcc + then + AC_DEFINE(HAVE_GCC_VARARGS_MACROS, 1, + [System supports GCC-style variable-length argument macros]) + fi +fi +]) +dnl ====================================================================== |