From aeb22f486139f457ae7fc44c2d931312aaae52d8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Wed, 18 Jan 2023 18:25:25 +0100
Subject: Update Gnulib to v0.1-5703-g356a414e8c and add 'posix_spawn' module.

This is a followup to edfca3b7e5931b5b5a83112e2a9813b068be99c2, which
added the 'posix_spawnp' module but not 'posix_spawn'.

* m4/gnulib-cache.m4: Add 'posix_spawn' module.
* gnulib-local/m4/clock_time.m4.diff: Adjust.
* configure.ac: Move 'gl_EARLY' use right after 'AC_PROG_CC'.
---
 m4/c-bool.m4 | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 m4/c-bool.m4

(limited to 'm4/c-bool.m4')

diff --git a/m4/c-bool.m4 b/m4/c-bool.m4
new file mode 100644
index 000000000..f614371bb
--- /dev/null
+++ b/m4/c-bool.m4
@@ -0,0 +1,51 @@
+# Check for bool that conforms to C2023.
+
+dnl Copyright 2022-2023 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.
+
+AC_DEFUN([gl_C_BOOL],
+[
+  AC_CACHE_CHECK([for bool, true, false], [gl_cv_c_bool],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_SOURCE([[
+          #if true == false
+           #error "true == false"
+          #endif
+          extern bool b;
+          bool b = true == false;]])],
+       [gl_cv_c_bool=yes],
+       [gl_cv_c_bool=no])])
+  if test "$gl_cv_c_bool" = yes; then
+    AC_DEFINE([HAVE_C_BOOL], [1],
+      [Define to 1 if bool, true and false work as per C2023.])
+  fi
+
+  AC_CHECK_HEADERS_ONCE([stdbool.h])
+
+  dnl The "zz" puts this toward config.h's end, to avoid potential
+  dnl collisions with other definitions.
+  dnl If 'bool', 'true' and 'false' do not work, arrange for them to work.
+  dnl In C, this means including <stdbool.h> if it is not already included.
+  dnl However, if the preprocessor mistakenly treats 'true' as 0,
+  dnl define it to a bool expression equal to 1; this is needed in
+  dnl Sun C++ 5.11 (Oracle Solaris Studio 12.2, 2010) and older.
+  AH_VERBATIM([zzbool],
+[#ifndef HAVE_C_BOOL
+# if !defined __cplusplus && !defined __bool_true_false_are_defined
+#  if HAVE_STDBOOL_H
+#   include <stdbool.h>
+#  else
+#   if defined __SUNPRO_C
+#    error "<stdbool.h> is not usable with this configuration. To make it usable, add -D_STDC_C99= to $CC."
+#   else
+#    error "<stdbool.h> does not exist on this platform. Use gnulib module 'stdbool-c99' instead of gnulib module 'stdbool'."
+#   endif
+#  endif
+# endif
+# if !true
+#  define true (!false)
+# endif
+#endif])
+])
-- 
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