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# -*- Autoconf -*-
AC_DEFUN([RUBY_CHECK_VA_COPY], [
AS_IF([test "x$rb_cv_va_copy" = x], [dnl
AC_TRY_LINK(
[@%:@include <stdlib.h>
@%:@include <stdarg.h>
@%:@include <string.h>
@%:@define CONFTEST_VA_COPY(dst, src) $2
void
conftest(int n, ...)
{
va_list ap, ap2;
int i;
va_start(ap, n);
CONFTEST_VA_COPY(ap2, ap);
for (i = 0; i < n; i++) if ((int)va_arg(ap, int) != n - i - 1) abort();
va_end(ap);
CONFTEST_VA_COPY(ap, ap2);
for (i = 0; i < n; i++) if ((int)va_arg(ap, int) != n - i - 1) abort();
va_end(ap);
va_end(ap2);
}],
[
conftest(10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
],
[rb_cv_va_copy="$1"],
[rb_cv_va_copy=""])dnl
])dnl
])dnl
dnl
|
