As said, you need Autoconf version 2.71 or higher.
You have only 2.69, which is very old:
> $ autoreconf --version
> autoreconf (GNU Autoconf) 2.69
> Copyright (C) 2012 Free Software Foundation, Inc.
[...]
well, not sure how to fix that
$ yum provides /usr/bin/autoreconf
Last metadata expiration check: 0:57:11 ago on Tue 09 Jul 2024 06:17:12 AM MST.
autoconf-2.69-38.el9.noarch : A GNU tool for automatically configuring source code
Repo : @System
Matched from:
Filename : /usr/bin/autoreconf
autoconf-2.69-38.el9.noarch : A GNU tool for automatically configuring source code
Repo : appstream
Matched from:
Filename : /usr/bin/autoreconf
$ sudo yum update autoconf
Last metadata expiration check: 1:35:55 ago on Tue 09 Jul 2024 05:39:30 AM MST.
Dependencies resolved.
Nothing to do.
Complete!
so I hacked a Makefile from Makefile.in and created a minimal config.h to at least build (most) .o files
I've implemented this, there's a high probability you'll want something different :)
$ cat test.c
#ifdef SHOW_BUF_OVERFLOW
#define REPORT_SNPRINTF(wr,sz) if (wr >= (int)(sz)) fprintf(stderr, "%s:%d: caught internal buffer overflow\n", __FILE__, __LINE__)
#else
#define REPORT_SNPRINTF(wr,sz) (void) wr
#endif // SHOW_BUF_OVERFLOW
#include <stdio.h>
int main()
{
char buf[10];
int max;
max = snprintf(buf, sizeof(buf), "%s", "short"); REPORT_SNPRINTF(max, sizeof(buf));
printf("%s\n", buf);
max = snprintf(buf, sizeof(buf), "%s", "this string is too long to fit"); REPORT_SNPRINTF(max, sizeof(buf));
printf("%s\n", buf);
return 0;
}
$ cc test.c -o test -DSHOW_BUF_OVERFLOW
$ ./test
short
test.c:20: caught internal buffer overflow
this stri
$ cc test.c -o test
$ ./test
short
this stri
here's the patch... please review/scrutinize before accepting
snprintf.patch