In <http://lists.gnu.org/archive/html/bug-bison/2005-09/msg00021.html>
Nelson H. F. Beebe summarized the following problem with building
Bison 2.1 on Solaris 10 with Sun C 5.7 c89 -D_XOPEN_SOURCE
-D_XOPEN_SOURCE_EXTENDED:
/opt/SUNWspro/bin/c89 -DHAVE_CONFIG_H -I. -I. -I.. -I/usr/local/include
-D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED=1 -I/usr/local/include -c subpipe.c
"/usr/include/sys/types.h", line 487: warning: useless declaration
"/usr/include/sys/types.h", line 487: warning: typedef declares no type name
"/usr/include/sys/regset.h", line 304: syntax error before or at: uint64_t
"/usr/include/sys/regset.h", line 307: syntax error before or at: uint64_t
c89: acomp failed for subpipe.c
I tracked this down, I think, to a bug in Solaris 10's system headers
when compiled with c89 -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED
-D__EXTENSIONS__. With that combination, you cannot compile a simple
file containing only "#include <stdlib.h>" because types like uint64_t
are used without being defined.
I installed this patch to work around the problem: it causes
"configure" to not defined __EXTENSIONS__ in this case. This
is installed into both gnulib and coreutils.
2006-02-05 Paul Eggert <[EMAIL PROTECTED]>
* extensions.m4 (gl_USE_SYSTEM_EXTENSIONS): Don't #define
__EXTENSIONS__ if this causes compilation to fail. Problem
reported by Nelson H. F. Beebe with Solaris 10 and Sun C 5.7
c89 -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED.
--- extensions.m4.~1.7.~ 2005-05-26 10:33:40.000000000 -0700
+++ extensions.m4 2006-02-05 20:56:45.000000000 -0800
@@ -1,6 +1,6 @@
# Enable extensions on systems that normally disable them.
-# Copyright (C) 2003 Free Software Foundation, Inc.
+# Copyright (C) 2003, 2006 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
@@ -25,6 +25,15 @@ AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS], [
#ifndef _POSIX_PTHREAD_SEMANTICS
# undef _POSIX_PTHREAD_SEMANTICS
#endif])
- AC_DEFINE([__EXTENSIONS__])
+ AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__],
+ [ac_cv_safe_to_define___extensions__],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([
+ #define __EXTENSIONS__ 1
+ AC_INCLUDES_DEFAULT])],
+ [ac_cv_safe_to_define___extensions__=yes],
+ [ac_cv_safe_to_define___extensions__=no])])
+ test $ac_cv_safe_to_define___extensions__ == yes &&
+ AC_DEFINE([__EXTENSIONS__])
AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
])
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