stdbool.m4		stdbool.m4
	# Check for stdbool.h that conforms to C99.		# Check for stdbool.h that conforms to C99.
	dnl Copyright (C) 2002-2006, 2009-2010 Free Software Foundation, Inc.		dnl Copyright (C) 2002-2006, 2009-2014 Free Software Foundation, Inc.
	dnl This file is free software; the Free Software Foundation		dnl This file is free software; the Free Software Foundation
	dnl gives unlimited permission to copy and/or distribute it,		dnl gives unlimited permission to copy and/or distribute it,
	dnl with or without modifications, as long as this notice is preserved.		dnl with or without modifications, as long as this notice is preserved.
			#serial 5
	# Prepare for substituting <stdbool.h> if it is not supported.		# Prepare for substituting <stdbool.h> if it is not supported.
	AC_DEFUN([AM_STDBOOL_H],		AC_DEFUN([AM_STDBOOL_H],
	[		[
	AC_REQUIRE([AC_HEADER_STDBOOL])		AC_REQUIRE([AC_CHECK_HEADER_STDBOOL])
	# Define two additional variables used in the Makefile substitution.		# Define two additional variables used in the Makefile substitution.
	if test "$ac_cv_header_stdbool_h" = yes; then		if test "$ac_cv_header_stdbool_h" = yes; then
	STDBOOL_H=''		STDBOOL_H=''
	else		else
	STDBOOL_H='stdbool.h'		STDBOOL_H='stdbool.h'
	fi		fi
	AC_SUBST([STDBOOL_H])		AC_SUBST([STDBOOL_H])
			AM_CONDITIONAL([GL_GENERATE_STDBOOL_H], [test -n "$STDBOOL_H"])
	if test "$ac_cv_type__Bool" = yes; then		if test "$ac_cv_type__Bool" = yes; then
	HAVE__BOOL=1		HAVE__BOOL=1
	else		else
	HAVE__BOOL=0		HAVE__BOOL=0
	fi		fi
	AC_SUBST([HAVE__BOOL])		AC_SUBST([HAVE__BOOL])
	])		])
	# AM_STDBOOL_H will be renamed to gl_STDBOOL_H in the future.		# AM_STDBOOL_H will be renamed to gl_STDBOOL_H in the future.
	AC_DEFUN([gl_STDBOOL_H], [AM_STDBOOL_H])		AC_DEFUN([gl_STDBOOL_H], [AM_STDBOOL_H])
	# This macro is only needed in autoconf <= 2.59. Newer versions of autocon		# This version of the macro is needed in autoconf <= 2.68.
	f
	# have this macro built-in.
	AC_DEFUN([AC_HEADER_STDBOOL],		AC_DEFUN([AC_CHECK_HEADER_STDBOOL],
	[AC_CACHE_CHECK([for stdbool.h that conforms to C99],		[AC_CACHE_CHECK([for stdbool.h that conforms to C99],
	[ac_cv_header_stdbool_h],		[ac_cv_header_stdbool_h],
	[AC_TRY_COMPILE(		[AC_COMPILE_IFELSE(
	[		[AC_LANG_PROGRAM(
	#include <stdbool.h>		[[
	#ifndef bool		#include <stdbool.h>
	"error: bool is not defined"		#ifndef bool
	#endif		"error: bool is not defined"
	#ifndef false		#endif
	"error: false is not defined"		#ifndef false
	#endif		"error: false is not defined"
	#if false		#endif
	"error: false is not 0"		#if false
	#endif		"error: false is not 0"
	#ifndef true		#endif
	"error: true is not defined"		#ifndef true
	#endif		"error: true is not defined"
	#if true != 1		#endif
	"error: true is not 1"		#if true != 1
	#endif		"error: true is not 1"
	#ifndef __bool_true_false_are_defined		#endif
	"error: __bool_true_false_are_defined is not defined"		#ifndef __bool_true_false_are_defined
	#endif		"error: __bool_true_false_are_defined is not defined"
			#endif
	struct s { _Bool s: 1; _Bool t; } s;
			struct s { _Bool s: 1; _Bool t; } s;
	char a[true == 1 ? 1 : -1];
	char b[false == 0 ? 1 : -1];		char a[true == 1 ? 1 : -1];
	char c[__bool_true_false_are_defined == 1 ? 1 : -1];		char b[false == 0 ? 1 : -1];
	char d[(bool) 0.5 == true ? 1 : -1];		char c[__bool_true_false_are_defined == 1 ? 1 : -1];
	bool e = &s;		char d[(bool) 0.5 == true ? 1 : -1];
	char f[(_Bool) 0.0 == false ? 1 : -1];		/* See body of main program for 'e'. */
	char g[true];		char f[(_Bool) 0.0 == false ? 1 : -1];
	char h[sizeof (_Bool)];		char g[true];
	char i[sizeof s.t];		char h[sizeof (_Bool)];
	enum { j = false, k = true, l = false * true, m = true * 256 };		char i[sizeof s.t];
	_Bool n[m];		enum { j = false, k = true, l = false * true, m = true * 256 }
	char o[sizeof n == m * sizeof n[0] ? 1 : -1];		;
	char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];		/* The following fails for
	#if defined __xlc__ || defined __GNUC__		HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */
	/* Catch a bug in IBM AIX xlc compiler version 6.0.0.0		_Bool n[m];
	reported by James Lemley on 2005-10-05; see		char o[sizeof n == m * sizeof n[0] ? 1 : -1];
	http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00		char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
	086.html		/* Catch a bug in an HP-UX C compiler. See
	This test is not quite right, since xlc is allowed to		http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
	reject this program, as the initializer for xlcbug is		http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg
	not one of the forms that C requires support for.		00161.html
	However, doing the test right would require a run-time		*/
	test, and that would make cross-compilation harder.		_Bool q = true;
	Let us hope that IBM fixes the xlc bug, and also adds		_Bool *pq = &q;
	support for this kind of constant expression. In the		]],
	meantime, this test will reject xlc, which is OK, since		[[
	our stdbool.h substitute should suffice. We also test		bool e = &s;
	this with GCC, where it should work, to detect more		*pq |= q;
	quickly whether someone messes up the test in the		*pq |= ! q;
	future. */		/* Refer to every declared value, to avoid compiler optimizati
	char digs[] = "0123456789";		ons. */
	int xlcbug = 1 / (&(digs + 5)[-2 + (bool) 1] == &digs[4] ? 1 : -		return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k
	1);		+ !!l
	#endif		+ !m + !n + !o + !p + !q + !pq);
	/* Catch a bug in an HP-UX C compiler. See		]])],
	http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
	http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg001
	61.html
	*/
	_Bool q = true;
	_Bool *pq = &q;
	],
	[
	*pq |= q;
	*pq |= ! q;
	/* Refer to every declared value, to avoid compiler optimizations
	. */
	return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !
	!l
	+ !m + !n + !o + !p + !q + !pq);
	],
	[ac_cv_header_stdbool_h=yes],		[ac_cv_header_stdbool_h=yes],
	[ac_cv_header_stdbool_h=no])])		[ac_cv_header_stdbool_h=no])])
	AC_CHECK_TYPES([_Bool])		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])
End of changes. 8 change blocks.
	81 lines changed or deleted		66 lines changed or added
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