> So AC_HEADER_STDBOOL should remove any preexisting stdbool.h before
> doing any tests that depend on stdbool.h.
Fixed.
> I don't see why this would be needed. `make distclean' can just
> remove stdbool.h unconditionally.
Right.
> Can't you use ac_cv_header_stdbool_h for this purpose?
ac_cv_header_stdbool_h was just yes/no -- but of course it can be used
for it. STDBOOL_H was just a relic of the GNU gettext test, so let's
remove it.
> There's no reason to index STAT_MACROS_BROKEN here.
I had noted that after posting :-(
> If you use this macro, you should also add
> @file{@var{directory}/stdbool.h} to the list of files you remove in
> @code{distclean} targets.
Ok.
> bool a1[false || !true ? -1 : 1];
> #if !defined false || !true || !defined bool
> int a2[-1];
> #endif
Ok again (though I liked my version more...)
> ac_file=m4_default([$2], .)/stdbool.h
You never end learning m4sugar'isms.
> The generated file should contain a copyright notice; otherwise the
> file is not free. I suggest appending the following text here:
Fixed in this patch. I also wonder if it's good to turn the
AC_CONFIG_COMMANDS line to
AC_CONFIG_COMMANDS(m4_ifelse([$2], , , [$2]/)stdbool.h, [
Do you gurus know which one integrates better with Automake?
> One last thing: you need to sign papers for Autoconf for us to accept
> this contribution, as it's nontrivial. I'll send you the forms if you
> don't have them already.
I'll send assign.changes tomorrow.
Paolo
diff -r -U3 old/doc/autoconf.texi new/doc/autoconf.texi
--- old/doc/autoconf.texi Fri Nov 2 17:10:56 2001
+++ new/doc/autoconf.texi Thu Nov 8 21:19:58 2001
@@ -3996,6 +3996,19 @@
@end defmac
+@defmac AC_HEADER_STDBOOL (@var{path})
+@acindex HEADER_STDBOOL
+If @file{stdbool.h} is absent or does not work correctly, create a
+file @file{@var{directory}/stdbool.h} (default @file{./stdbool.h})
+that does work. This macro invokes @code{AC_CONFIG_COMMANDS} so it
+is an instantiating macro; see @ref{Configuration Actions}.
+
+If you use this macro, you should also add
+@file{@var{directory}/stdbool.h} to the list of files you remove in
+@code{distclean} targets.
+@end defmac
+
+
@defmac AC_HEADER_STDC
@acindex HEADER_STDC
@cvindex STDC_HEADERS
diff -r -U3 old/lib/autoconf/headers.m4 new/lib/autoconf/headers.m4
--- old/lib/autoconf/headers.m4 Wed Oct 10 15:08:59 2001
+++ new/lib/autoconf/headers.m4 Thu Nov 8 21:26:23 2001
@@ -395,6 +395,67 @@
])# AC_HEADER_STAT
+# AC_HEADER_STDBOOL
+# -----------------
+AC_DEFUN([AC_HEADER_STDBOOL], [
+AC_CACHE_CHECK(for a working stdbool.h, ac_cv_header_stdbool_h, [
+ ac_file=m4_default([$2], .)/stdbool.h
+ rm -f $ac_file
+ AC_TRY_COMPILE([#include <stdbool.h>
+bool a1[false || !true ? -1 : 1];
+#if !defined false || !true || !defined bool
+int a2[-1];
+#endif
+], [], ac_cv_header_stdbool_h=yes, ac_cv_header_stdbool_h=no)])
+
+AC_CONFIG_COMMANDS(stdbool.h, [
+ ac_file=m4_default([$2], .)/stdbool.h
+ rm -f $ac_file
+ if test $ac_cv_header_stdbool_h = no; then
+ echo config.status: creating $ac_file
+ cat > $ac_file << \EOF_STDBOOL_H
+/* ISO C 99 <stdbool.h> for platforms that lack it.
+ 7.16. Boolean type and values
+
+ Written by Bruno Haible <[EMAIL PROTECTED]>, 2001.
+ Copyright (C) 2001 Free Software Foundation, Inc.
+ Copying and distribution of this stdbool.h file, with or without
+ modification, are permitted provided the copyright notice and this
+ notice are preserved. */
+#ifndef _STDBOOL_H
+#define _STDBOOL_H
+
+/* Everybody seems to #define false 0, true 1. We use the same
+ definitions below, but temporarily we have to #undef them. */
+#ifdef false
+# undef false
+#endif
+#ifdef true
+# undef true
+#endif
+
+/* For the sake of symbolic names in gdb, define _Bool as an enum
type. */
+#ifndef __cplusplus
+typedef enum { false = 0, true = 1 } _Bool;
+#else
+typedef bool _Bool;
+#endif
+#define bool _Bool
+
+/* The other macros must be usable in preprocessor directives. */
+#define false 0
+#define true 1
+#define __bool_true_false_are_defined 1
+
+#endif /* _STDBOOL_H */
+EOF_STDBOOL_H
+fi
+ ],
+ [ac_cv_header_stdbool_h="$ac_cv_header_stdbool_h"])
+
+])# AC_HEADER_STDBOOL
+
+
# AC_HEADER_STDC
# --------------
AC_DEFUN([AC_HEADER_STDC],
--
|_ _ _ __
|_)(_)| ) ,'
-------- '-._
