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[Bug bootstrap/38591] New: erratic comparison failures on very fast machines
- From: "ebotcazou at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 21 Dec 2008 10:13:23 -0000
- Subject: [Bug bootstrap/38591] New: erratic comparison failures on very fast machines
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
Since we started building the 4.3.x compiler on very fast Linux machines (bi-
quad cores) we have observed erratic but consistent comparison failures, say
a handful of times a month. The problematic file is always the same:
Comparing stages 2 and 3
Bootstrap comparison failure!
./sparseset.o differs
make[2]: *** [compare] Error 1
The stage 3 object file is not compiled as it should be; in fact, it can be
obtained manually by changing
#define ENABLE_ASSERT_CHECKING 1
to
/* #undef ENABLE_ASSERT_CHECKING */
in gcc/auto-host.h.
so there might be a race condition somewhere in the top-level bootstrap (note
that we have never built 4.2.x on the same machines).
--
Summary: erratic comparison failures on very fast machines
Product: gcc
Version: 4.3.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ebotcazou at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38591