On Sat, Jul 26, 2008 at 11:41:18PM +0530, Girish Shilamkar wrote:
> Hi Ted,
> While building e2fsprogs on ia64/rhel4 the following compile error was
> flagged:
>
> Error messages:
> make[4]: Leaving directory `/cache/build/BUILD/e2fsprogs-1.40.7.sun1/lib/uuid'
> CC clear.c
> CC compare.c
> CC copy.c
> CC gen_uuid.c
> gen_uuid.c: In function `uuid__generate_time':
> gen_uuid.c:493: internal compiler error: in ia64_expand_load_address, at
> config/ia64/ia64.c:1184
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <URL:http://bugzilla.redhat.com/bugzilla> for instructions.
> Preprocessed source stored into /tmp/ccYkSBN6.out file, please attach this to
> your bugreport.
> make[3]: *** [gen_uuid.o] Error 1
Well, as stated above, this is very clearly an IA64 optimizer bug in
GCC where it's not able to handle __thread with a pretty specific
piece of code.
It's also on a relatively ancient distribution and GCC version. You
could try reportig the bug to Red Hat to see if they are willing to
provide a fix. Failing that, probably the best thing to do is just to
use configure --disable-tls on a RHEL4/ia64 system. The main purpose
of the use of thread local storage is to avoid duplicate UUID's on SMP
systems when you have multiple threads generating UUID's at a very
high rate.
Certain database-driven applications will have a problem here, but
it's not clear it will matter for most users of Lustre.
Regards,
- Ted