Patch for gcc filebuf_members test

Ken Moffat ken at
Thu Mar 25 04:09:10 PST 2004

 I still don't understand what is going on, in particular why this
sometimes isn't necessary and why it occasionally doesn't help, but so
far it's the best I've got.

 das eine Mal als Tragödie, das andere Mal als Farce
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Submitted By: Ken Moffat <ken at
Date: 2004-03-24
Initial Package Version: 3.3.3
Upstream Status: not submitted, I don't understand the problem well enough.
Origin: reverts a test to how it was in 3.3.2
Description:  Some of us building gcc-3.3.3 have had problems with the
chapter 5 testsuite.  This patch attempts to address the problem where
the filebuf_members test hangs the build.  The problem seems to only
happen when building from a recent system (e.g. LFS-5.0 or later), and
may be related to using scripts to build with.
 My current view is that this isn't an arch-specific problem, but we have
a shortage of test data at the moment.  

 I have seen occasional cases where this patch doesn't fix the problem,
e.g. a _third_ build of identical versions of everything ( I needed to try
a different hardware configuration).

 Applying this patch to chapter 6 may make it easier to get a clean umount
at the end of the build, or not, depending on the version of glibc.

 Summary - the build with 3.3.3 can be somewhat problematic, this patch
may help.

diff -Naur gcc-3.3.3/libstdc++-v3/testsuite/27_io/ gcc-3.3.2/libstdc++-v3/testsuite/27_io/
--- gcc-3.3.3/libstdc++-v3/testsuite/27_io/	2004-02-05 20:24:48.000000000 +0000
+++ gcc-3.3.2/libstdc++-v3/testsuite/27_io/	2003-04-22 22:07:24.000000000 +0100
@@ -217,10 +217,7 @@
   std::filebuf fbuf;
-  std::filebuf* r =,
-			      std::ios_base::in
-			      | std::ios_base::out
-			      | std::ios_base::ate);
+  std::filebuf* r =, std::ios_base::out | std::ios_base::ate);
   VERIFY( !fbuf.is_open() );
   VERIFY( r == NULL );
@@ -252,7 +249,7 @@
   filebuf fb;
-  filebuf* ret =, ios_base::in | ios_base::out);
+  filebuf* ret =, ios_base::out | ios_base::trunc);
   VERIFY( ret != NULL );
   VERIFY( fb.is_open() );
@@ -260,7 +257,7 @@
   ret = fb.close();
-  VERIFY( ret != NULL );
+  VERIFY( ret == NULL );
   VERIFY( !fb.is_open() );

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