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dnl --------------------------------------------------------------------------
dnl PA_FUNC_VSNPRINTF
dnl
dnl See if we have [_]vsnprintf(), using the proper prototypes in case
dnl it is a builtin of some kind.
dnl --------------------------------------------------------------------------
AC_DEFUN([PA_FUNC_VSNPRINTF],
[AC_CACHE_CHECK([for vsnprintf], [pa_cv_func_vsnprintf],
[pa_cv_func_vsnprintf=no
for pa_try_func_vsnprintf in vsnprintf _vsnprintf
do
AS_IF([test $pa_cv_func_vsnprintf = no],
[AC_LINK_IFELSE([AC_LANG_SOURCE([
AC_INCLUDES_DEFAULT
const char *vsnprintf_test(const char *fmt, va_list va);
const char *vsnprintf_test(const char *fmt, va_list va)
{
static char buf[[256]];
size_t sz;
sz = $pa_try_func_vsnprintf(buf, sizeof buf, fmt, va);
return (sz < sizeof buf) ? buf : NULL;
}
const char *vsnprintf_caller(const char *fmt, ...);
const char *vsnprintf_caller(const char *fmt, ...)
{
const char *what;
va_list va;
va_start(va, fmt);
what = vsnprintf_test(fmt, va);
va_end(va);
return what;
}
int main(void) {
puts(vsnprintf_caller("Hello = %d", 33));
return 0;
}
])],
[pa_cv_func_vsnprintf=$pa_try_func_vsnprintf])])
done
])
AS_IF([test $pa_cv_func_vsnprintf = no],
[],
[AC_DEFINE([HAVE_VSNPRINTF], 1,
[Define to 1 if you have some version of the vsnprintf function.])
AS_IF([test $pa_cv_func_vsnprintf = vsnprintf],
[],
[AC_DEFINE_UNQUOTED([vsnprintf], [$pa_cv_func_vsnprintf],
[Define if your vsnprintf function is not named vsnprintf.])])])])
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