[Xen-devel] [PATCH] fix for bz #858 - hanging domUs with gcc 4.2

["Charles Coffing" <ccoffing@xxxxxxxxxx>]

Hi,

This bug:
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=858
is caused by -fstrict-aliasing being enabled by default in gcc 4.2 when -O2, 
-O3, or -Os are used.  (Quick recap of the bug:  When the tools are built using 
gcc 4.2, various hangs of the domUs are observed.)

The simplest fix is to disable strict aliasing for xenstore.  Please apply the 
following patch to xen-unstable (and xen-3.1, if fixes are being accumulated 
there).

Thanks.

Signed-off-by: Charles Coffing <ccoffing@xxxxxxxxxx>


--- xen-3.1-testing.orig/tools/xenstore/Makefile
+++ xen-3.1-testing/tools/xenstore/Makefile
@@ -6,7 +6,7 @@ MAJOR = 3.0
 MINOR = 0

 PROFILE=#-pg
-BASECFLAGS=-Werror
+BASECFLAGS=-Werror -fno-strict-aliasing
 # Make gcc generate dependencies.
 BASECFLAGS += -Wp,-MD,.$(@F).d
 PROG_DEP = .*.d



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