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-rw-r--r--m4/stdbool.m414
1 files changed, 5 insertions, 9 deletions
diff --git a/m4/stdbool.m4 b/m4/stdbool.m4
index df10486d0a..838cf0f467 100644
--- a/m4/stdbool.m4
+++ b/m4/stdbool.m4
@@ -5,13 +5,13 @@ 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 4
# 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.
@@ -33,11 +33,9 @@ AC_DEFUN([AM_STDBOOL_H],
# 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(
@@ -98,6 +96,4 @@ AC_DEFUN([AC_HEADER_STDBOOL],
[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])
+])