Re: Building m4 on BSDI 4.0.1

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According to Chris McGuire on 12/12/2006 11:21 AM:
> 	pico src/stackovf.c
> 		Replace 'ss_sp' with 'ss_base'
> 		NOTE: Got this info from
> 			http://permalink.gmane.org/gmane.editors.vim/6456

You didn't say which instance of ss_sp.  However, I think this patch does
the trick.  Let me know if you need a private snapshot of 1.4.8a with the
patch pre-applied (and configure regenerated), to test it out on your machine.

> source='mbchar.c' object='mbchar.o' libtool=no \
>         DEPDIR=.deps depmode=gcc /bin/bash ../depcomp \
>         gcc  -I.     -g -O2 -c mbchar.c
> In file included from mbchar.h:157,
>                  from mbchar.c:22:
> /usr/include/wchar.h:16: syntax error before `*'

I'm still not sure why your system wchar.h breaks the compile.  What does
/usr/include/wchar.h look like around line 16?  ('head -n20
/usr/include/wchar.h' might be useful).  Once we figure out what
prerequisite header is missing from gnulib's mbchar.[ch], we can hopefully
get that fixed.

2006-12-20  Eric Blake  <[email protected]>

	* configure.ac (AC_CHECK_MEMBERS): Check for stack_t.ss_sp, and
	assume the fallback of ss_base for BSDI 4.0.1.
	* src/stackovf.c (setup_stackovf_trap) [HAVE_SIGALTSTACK &&
	! HAVE_STACK_T_SS_SP]: Use this check.
	Reported by Chris McGuire.
	* THANKS: Update.

- --
Life is short - so eat dessert first!

Eric Blake             [email protected]

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Index: configure.ac
===================================================================
RCS file: /sources/m4/m4/configure.ac,v
retrieving revision 1.36.2.32
diff -u -p -r1.36.2.32 configure.ac
--- configure.ac	9 Dec 2006 17:06:30 -0000	1.36.2.32
+++ configure.ac	21 Dec 2006 03:25:18 -0000
@@ -43,6 +43,12 @@ AC_CHECK_TYPES([siginfo_t], [], [],
 AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], [], [],
 [[#include <signal.h>
 ]])
+AC_CHECK_MEMBERS([stack_t.ss_sp], [], [],
+[[#include <signal.h>
+#if HAVE_SIGINFO_H
+# include <siginfo.h>
+#endif
+]])
 
 AC_TYPE_SIGNAL
 AC_TYPE_SIZE_T
Index: src/stackovf.c
===================================================================
RCS file: /sources/m4/m4/src/stackovf.c,v
retrieving revision 1.1.1.1.2.6
diff -u -p -r1.1.1.1.2.6 stackovf.c
--- src/stackovf.c	3 Aug 2006 12:51:05 -0000	1.1.1.1.2.6
+++ src/stackovf.c	21 Dec 2006 03:25:18 -0000
@@ -341,6 +341,11 @@ Error - Do not know how to set up stack-
 
   {
     stack_t ss;
+# ifndef HAVE_STACK_T_SS_SP
+    /* This workaround is for BSDI 4.0.1:
+       http://lists.gnu.org/archive/html/bug-m4/2006-12/msg00004.html  */
+#  define ss_sp ss_base
+# endif
 
     ss.ss_size = SIGSTKSZ;
     ss.ss_sp = xmalloc ((unsigned) ss.ss_size);