summaryrefslogtreecommitdiff
path: root/m4
diff options
context:
space:
mode:
authorJim Meyering <jim@meyering.net>2003-06-06 07:14:57 +0000
committerJim Meyering <jim@meyering.net>2003-06-06 07:14:57 +0000
commit7304b6fa17205f56be5569ee2fb3ada487160456 (patch)
treec3f0c857c91dff4f4354f1002c5aa0e0a87a0770 /m4
parentad5d1a84fef90e5112002b6bba909dcfb8f9cf47 (diff)
downloadcoreutils-7304b6fa17205f56be5569ee2fb3ada487160456.tar.xz
Update from gnulib.
Diffstat (limited to 'm4')
-rw-r--r--m4/stdbool.m429
1 files changed, 28 insertions, 1 deletions
diff --git a/m4/stdbool.m4 b/m4/stdbool.m4
index 14e590294..ed000c816 100644
--- a/m4/stdbool.m4
+++ b/m4/stdbool.m4
@@ -1,6 +1,6 @@
# Check for stdbool.h that conforms to C99.
-# Copyright (C) 2002 Free Software Foundation, Inc.
+# Copyright (C) 2002-2003 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@@ -17,6 +17,32 @@
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
+# Prepare for substituting <stdbool.h> if it is not supported.
+
+AC_DEFUN([AM_STDBOOL_H],
+[
+ AC_REQUIRE([AC_HEADER_STDBOOL])
+
+ # Define two additional variables used in the Makefile substitution.
+
+ if test "$ac_cv_header_stdbool_h" = yes; then
+ STDBOOL_H=''
+ else
+ STDBOOL_H='stdbool.h'
+ fi
+ AC_SUBST([STDBOOL_H])
+
+ if test "$ac_cv_type__Bool" = yes; then
+ HAVE__BOOL=1
+ else
+ HAVE__BOOL=0
+ fi
+ AC_SUBST([HAVE__BOOL])
+])
+
+# This macro is only needed in autoconf <= 2.54. Newer versions of autoconf
+# have this macro built-in.
+
AC_DEFUN([AC_HEADER_STDBOOL],
[AC_CACHE_CHECK([for stdbool.h that conforms to C99],
[ac_cv_header_stdbool_h],
@@ -57,6 +83,7 @@ AC_DEFUN([AC_HEADER_STDBOOL],
[ return !a + !b + !c + !d + !e + !f + !g + !h + !i; ],
[ac_cv_header_stdbool_h=yes],
[ac_cv_header_stdbool_h=no])])
+ AC_CHECK_TYPES([_Bool])
if test $ac_cv_header_stdbool_h = yes; then
AC_DEFINE(HAVE_STDBOOL_H, 1, [Define to 1 if stdbool.h conforms to C99.])
fi])