From 59cb9127de519fa2db1c704045551ba447d6ffcb Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Fri, 12 Nov 2010 03:20:13 +0100
Subject: [PATCH] fcntl-h: Fix for use of C++ on glibc systems.

* lib/fcntl.in.h: Include <sys/stat.h> before include_next <fcntl.h>
also on glibc systems in C++ mode.
Reported by Gary V. Vaughan <gary@gnu.org>.
---
 ChangeLog      | 7 +++++++
 lib/fcntl.in.h | 8 +++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 8c4cde9581..d9e32a88f4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2010-11-11  Bruno Haible  <bruno@clisp.org>
+
+	fcntl-h: Fix for use of C++ on glibc systems.
+	* lib/fcntl.in.h: Include <sys/stat.h> before include_next <fcntl.h>
+	also on glibc systems in C++ mode.
+	Reported by Gary V. Vaughan <gary@gnu.org>.
+
 2010-11-11  Christian Weisgerber  <naddy@mips.inka.de>  (tiny change)
 
 	mknod: avoid false failure with dash
diff --git a/lib/fcntl.in.h b/lib/fcntl.in.h
index 663e49f32b..13f5dde97b 100644
--- a/lib/fcntl.in.h
+++ b/lib/fcntl.in.h
@@ -26,7 +26,13 @@
 /* Special invocation convention.  */
 
 #include <sys/types.h>
-#ifndef __GLIBC__ /* Avoid namespace pollution on glibc systems.  */
+/* On some systems other than glibc, <sys/stat.h> is a prerequisite of
+   <fcntl.h>.  On glibc systems, we would like to avoid namespace pollution.
+   But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an
+   extern "C" { ... } block, which leads to errors in C++ mode with the
+   overridden <sys/stat.h> from gnulib.  These errors are known to be gone
+   with g++ version >= 4.3.  */
+#if !defined __GLIBC__ || (defined __cplusplus && defined GNULIB_NAMESPACE && !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)))
 # include <sys/stat.h>
 #endif
 #@INCLUDE_NEXT@ @NEXT_FCNTL_H@
-- 
2.30.2