diff options
Diffstat (limited to 'aclocal.m4')
| -rw-r--r-- | aclocal.m4 | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/aclocal.m4 b/aclocal.m4 index 8ef7be030..e0422b2a0 100644 --- a/aclocal.m4 +++ b/aclocal.m4 @@ -1440,6 +1440,40 @@ fi ]) +dnl GMP_C_STDARG +dnl ------------ +dnl Test whether to use <stdarg.h> or <varargs.h>. +dnl +dnl Notice the AC_DEFINE here is HAVE_STDARG to avoid clashing with +dnl HAVE_STDARG_H which could arise from AC_CHECK_HEADERS. +dnl +dnl This test might be slight overkill, after all there's really only going +dnl to be ANSI or K&R and the two can be differentiated by AC_PROG_CC_STDC +dnl or very likely by the setups for _PROTO in gmp.h. On the other hand +dnl this test is nice and direct, being what we're going to actually use. + +AC_DEFUN(GMP_C_STDARG, +[AC_CACHE_CHECK([whether <stdarg.h> exists and works], + gmp_cv_c_stdarg, +[AC_TRY_COMPILE( +[#include <stdarg.h> +int foo (int x, ...) +{ + va_list ap; + int y; + va_start (ap, x); + y = va_arg (ap, int); + va_end (ap); + return y; +}],, +gmp_cv_c_stdarg=yes, gmp_cv_c_stdarg=no) +]) +if test $gmp_cv_c_stdarg = yes; then + AC_DEFINE(HAVE_STDARG, 1, [Define if <stdarg.h> exists and works]) +fi +]) + + dnl GMP_FUNC_ALLOCA dnl --------------- dnl Determine whether "alloca" is available. This is AC_FUNC_ALLOCA from |