[Python-checkins] r51906 - python/branches/release25-maint/README

[martin.v.loewis]

Author: martin.v.loewis
Date: Mon Sep 18 08:23:06 2006
New Revision: 51906

Modified:
   python/branches/release25-maint/README
Log:
Mention that GCC 4.1 is also affected, and that
adding -fwrapv helps.


Modified: python/branches/release25-maint/README
==============================================================================
--- python/branches/release25-maint/README	(original)
+++ python/branches/release25-maint/README	Mon Sep 18 08:23:06 2006
@@ -276,13 +276,16 @@
 submit a documentation bug report to SourceForge (see Bug Reports
 above) so we can remove them!)
 
+GCC 4.1,
 GCC 4.2: There is a known incompatibility between Python and GCC,
-         where GCC 4.2 takes an interpretation of C different from
+         where GCC 4.1 takes an interpretation of C different from
 	 prior GCC releases, in an area where C has undefined behaviour
 	 (namely, integer arithmetic involving -sys.maxint-1).
-	 As a consequence, compiling Python with GCC 4.2 is not
+	 As a consequence, compiling Python with GCC 4.1/4.2 is not
 	 recommend. It is likely that this problem will be resolved
-	 in future Python releases.
+	 in future Python releases. As a work-around, it seems that
+	 adding -fwrapv to the compiler option restores the earlier
+	 GCC behaviour.
 
 Unix platforms: If your vendor still ships (and you still use) Berkeley DB
         1.85 you will need to edit Modules/Setup to build the bsddb185