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va_copy is a C99ism

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Should provide appropriate fallback implementation.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62220 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
shyouhei 2018-02-05 04:07:25 +00:00
parent bb6c0f03a7
commit 779c18bf23
6 changed files with 73 additions and 4 deletions
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32
tool/m4/ruby_check_va_copy.m4 Normal file
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@ -0,0 +1,32 @@
# -*- Autoconf -*-
m4_define(RUBY_CHECK_VA_COPY, [
if test "x$rb_cv_va_copy" = x; then
AC_TRY_RUN(
[#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();
CONFTEST_VA_COPY(ap, ap2);
for (i = 0; i < n; i++) if ((int)va_arg(ap, int) != n - i - 1) abort();
va_end(ap);
}
int
main()
{
conftest(10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
exit(0);
}],
rb_cv_va_copy=[$1],
rb_cv_va_copy="",
rb_cv_va_copy="")dnl
fi
])dnl
dnl