Then, I'll try in P10 and reproduce it.
On 7/28/25 2:19 AM, Dan Horák wrote:
On Sun, 27 Jul 2025 21:34:12 +0200
Sandro Mani<manisan...@gmail.com> wrote:
Hi
scotch is currently FTBFS on ppc64le (affects the current 7.0.7, the
previous 7.0.6, as well as the new 7.0.8 release), failing with [1]
gmake[2]: *** [src/libscotch/CMakeFiles/ptscotchf_h.dir/build.make:77:
src/include/ptscotchf.h] Illegal instruction (core dumped)
7.0.6 previously successfully built withgcc-0:15.0.1-0.3.fc42.1.ppc64le and now
fails withgcc-0:15.1.1-5.fc43.1.ppc64le, so this looks like a gcc regression.
Being this on ppc64le and having no access to such a machine, how can I debug
this?
you have access to a system from
https://fedoraproject.org/wiki/Test_Machine_Resources_For_Package_Maintainers
and it can be reproduced there. But it needs the Power10 system (same
as current koji builders), not the Power9 (pre-DC-migration koji
builders, it builds there OK).
ppc64le-redhat-linux-gnu-openmpi/src/libscotch/ptdummysizes is the
crashing binary ...
and running it under gdb gives
...
Program received signal SIGILL, Illegal instruction.
0x00007ffff774e404 in sbrk () from /lib64/glibc-hwcaps/power10/libc.so.6
(gdb) where
#0 0x00007ffff774e404 in sbrk () from /lib64/glibc-hwcaps/power10/libc.so.6
#1 0x00007ffff787b38c in ucm_fire_mmap_events_internal () from
/lib64/libucm.so.0
#2 0x00007ffff787bd88 in ucm_mmap_test_events_nolock () from /lib64/libucm.so.0
#3 0x00007ffff78818b8 in ucm_mmap_install () from /lib64/libucm.so.0
#4 0x00007ffff7881b30 in ucm_mmap_init () from /lib64/libucm.so.0
#5 0x00007ffff7881c2c in ucm_library_init () from /lib64/libucm.so.0
#6 0x00007ffff7881cbc in ucm_set_global_opts () from /lib64/libucm.so.0
#7 0x00007ffff725745c in ucs_init_ucm_opts () from /lib64/libucs.so.0
#8 0x00007ffff7243fb0 in ucs_init () from /lib64/libucs.so.0
#9 0x00007ffff7f989bc in call_init (l=<optimized out>, argc=1,
argv=0x7fffffffece8, env=0x7fffffffecf8) atdl-init.c:74
#10 _dl_init (main_map=0x7ffff7ff12f0, argc=1, argv=0x7fffffffece8,
env=0x7fffffffecf8) atdl-init.c:121
#11 0x00007ffff7fc3eb8 in _dl_start_user () from /lib64/ld64.so.2
So it might be glibc actually ...
Dan
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