Re: Bug#154053: sendmailconfig fails due to m4 problems on Linux 2.0.x (fwd)

[Santiago Vila]

Akim Demaille wrote:
> | I've received the following report from the Debian Bug System.
> |
> | By looking at some m4 web pages, it seems to be a known problem.
> | Is there a workaround, other than upgrading to Linux 2.2.x or later?
> |
> | For example, if the configure script is changed so that it does not
> | check for sigaltstack and sigstack:
> |
> | --- configure.orig  Mon Jul 29 18:09:44 2002
> | +++ configure       Mon Jul 29 18:09:57 2002
> | @@ -1160,7 +1160,7 @@
> |  fi
> |
> |
> | -for ac_func in mkstemp sigaction sigaltstack sigstack sigvec strerror 
> tmpfile
> | +for ac_func in mkstemp sigaction sigvec strerror tmpfile
> |  do
> |  echo $ac_n "checking for $ac_func""... $ac_c" 1>&4
> |  if eval "test \"`echo '${'ac_cv_func_$ac_func'+set}'`\" = set"; then
> |
> | would the resulting m4 executable work reliably on every glibc-based system?
>
> I would recommend to fix the AC_CHECK_FUNC invocation to
>
> AC_CHECK_FUNCS([[sigstack]])

What do you mean, exactly? If I apply this patch:

--- ../m4-1.4.orig/configure.in 1994-11-06 04:40:38.000000000 +0100
+++ configure.in        2002-08-04 17:12:17.000000000 +0200
@@ -32,7 +32,7 @@
 AC_TYPE_SIGNAL
 AC_TYPE_SIZE_T

-AC_CHECK_FUNCS(mkstemp sigaction sigaltstack sigstack sigvec strerror tmpfile)
+AC_CHECK_FUNCS([[sigstack]])
 AC_FUNC_ALLOCA
 AC_FUNC_VPRINTF
 AC_REPLACE_FUNCS(strtol)

and rerun autoconf, this is the result:

[...]
gcc -c -DHAVE_CONFIG_H -I.. -I.  -O2 -Wall error.c
error.c: In function `private_strerror':
error.c:62: conflicting types for `sys_errlist'
/usr/include/stdio.h:552: previous declaration of `sys_errlist'
make[2]: *** [error.o] Error 1