# 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 gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
-#serial 3
+#serial 5
# Prepare for substituting <stdbool.h> if it is not supported.
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.
STDBOOL_H='stdbool.h'
fi
AC_SUBST([STDBOOL_H])
+ AM_CONDITIONAL([GL_GENERATE_STDBOOL_H], [test -n "$STDBOOL_H"])
if test "$ac_cv_type__Bool" = yes; then
HAVE__BOOL=1
# AM_STDBOOL_H will be renamed to gl_STDBOOL_H in the future.
AC_DEFUN([gl_STDBOOL_H], [AM_STDBOOL_H])
-# This version of the macro is needed in autoconf <= 2.67. Autoconf has
-# it built in since 2.60, but we want the tweaks from the 2.68 version
-# to avoid rejecting xlc and clang due to relying on extensions.
+# This version of the macro is needed in autoconf <= 2.68.
-AC_DEFUN([AC_HEADER_STDBOOL],
+AC_DEFUN([AC_CHECK_HEADER_STDBOOL],
[AC_CACHE_CHECK([for stdbool.h that conforms to C99],
[ac_cv_header_stdbool_h],
[AC_COMPILE_IFELSE(
[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])
+])