[patches] Support GCC's include-fixed directory

["Joseph S. Myers" <joseph@xxxxxxxxxxxxxxxx>]

After my patch <http://gcc.gnu.org/ml/gcc-patches/2007-02/msg02038.html> 
GCC now has two internal header directories, one for most of the 
GCC-provided headers and one for fixed headers - the latter including 
limits.h because of the complicated interaction between the GCC and libc 
versions of that header.

I've applied this patch to make EGLIBC's configure script know about the 
include-fixed directory; an extra -isystem option is harmless when using a 
5Bcompiler that doesn't have that directory.

Index: configure.in
===================================================================
--- configure.in	(revision 1583)
+++ configure.in	(working copy)
@@ -915,7 +915,7 @@
 # thing on a system that doesn't need fixincludes.  (Not presently a problem.)
 if test -n "$sysheaders"; then
   ccheaders=`$CC -print-file-name=include`
-  SYSINCLUDES="-nostdinc -isystem $ccheaders \
+  SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $ccheaders-fixed \
 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
   if test -n "$CXX"; then
     cxxversion=`$CXX -dumpversion 2>&AS_MESSAGE_LOG_FD` &&
Index: configure
===================================================================
--- configure	(revision 1583)
+++ configure	(working copy)
@@ -4566,7 +4566,7 @@
 # thing on a system that doesn't need fixincludes.  (Not presently a problem.)
 if test -n "$sysheaders"; then
   ccheaders=`$CC -print-file-name=include`
-  SYSINCLUDES="-nostdinc -isystem $ccheaders \
+  SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $ccheaders-fixed \
 -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
   if test -n "$CXX"; then
     cxxversion=`$CXX -dumpversion 2>&5` &&
Index: ChangeLog.eglibc
===================================================================
--- ChangeLog.eglibc	(revision 1583)
+++ ChangeLog.eglibc	(working copy)
@@ -1,3 +1,9 @@
+2007-02-27  Joseph Myers  <joseph@xxxxxxxxxxxxxxxx>
+
+	* configure.in: Also pass -isystem option for GCC's include-fixed
+	directory.
+	* configure: Regenerate.
+
 2007-02-20  Jim Blandy  <jimb@xxxxxxxxxxxxxxxx>
 
 	* Makefile (install-headers): Preserve old behavior: depend on

-- 
Joseph S. Myers
joseph@xxxxxxxxxxxxxxxx