Bug 2336255

Summary:	PyMCA fails to build with GCC 15 on ppc64le ("Illegal instruction (core dumped) ")
Product:	[Fedora] Fedora	Reporter:	Dave Malcolm <dmalcolm>
Component:	PyMca	Assignee:	Zbigniew Jędrzejewski-Szmek <zbyszek>
Status:	CLOSED INSUFFICIENT_DATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	i, jakub, sipoyare, zbyszek
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Target Release:	---
Hardware:	Unspecified
OS:	Linux
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Last Closed:	2025-01-17 13:10:13 UTC	Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:
Bug Depends On:
Bug Blocks:	2333037

Description Dave Malcolm 2025-01-07 21:57:35 UTC

I'm experimentally rebuilding rawhide with the not-yet-released GCC 15 to see if anything breaks, and to help write the porting guide.  See https://fedoraproject.org/wiki/User:Dmalcolm/gcc-15

My test build with GCC 15 failed on ppc64le:
 https://copr.fedorainfracloud.org/coprs/dmalcolm/gcc-15-smoketest-3.failed/build/8476045/

whereas my test builds with GCC 14 succeeded:
 https://copr.fedorainfracloud.org/coprs/dmalcolm/gcc-15-smoketest-3.failed.checker/build/8477598/ 

Looking at the failure logs
https://download.copr.fedorainfracloud.org/results/dmalcolm/gcc-15-smoketest-3.failed/fedora-rawhide-ppc64le/08476045-PyMca/builder-live.log.gz

I see:

+ cd pymca-5.9.3
+ QHULL_CFLAGS=-I/usr/include/libqhull
+ QHULL_LIBS=-lqhull
+ SPECFILE_USE_GNU_SOURCE=1
+ PYMCA_DATA_DIR=/usr/share/PyMca
+ PYMCA_DOC_DIR=/usr/share/doc/PyMca
+ CFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -mcpu=power8 -mtune=power8 -fasynchronous-unwind-tables -fstack-clash-protection '
+ LDFLAGS='-Wl,-z,relro -Wl,--as-needed  -Wl,-z,pack-relative-relocs -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -Wl,--build-id=sha1 -specs=/usr/lib/rpm/redhat/redhat-package-notes '
+ /usr/bin/python3 setup.py build '--executable=/usr/bin/python3 -sP'
/var/tmp/rpm-tmp.2Rz4KQ: line 57:    54 Illegal instruction     (core dumped) QHULL_CFLAGS="-I/usr/include/libqhull" QHULL_LIBS="-lqhull" SPECFILE_USE_GNU_SOURCE=1 PYMCA_DATA_DIR=/usr/share/PyMca PYMCA_DOC_DIR=/usr/share/doc/PyMca CFLAGS="${CFLAGS:-${RPM_OPT_FLAGS}}" LDFLAGS="${LDFLAGS:-${RPM_LD_FLAGS}}" /usr/bin/python3 setup.py build --executable="/usr/bin/python3 -sP"

RPM build errors:
error: Bad exit status from /var/tmp/rpm-tmp.2Rz4KQ (%build)
    Bad exit status from /var/tmp/rpm-tmp.2Rz4KQ (%build)

I'm not sure if this is a bug in GCC 15, or in the package.

Reproducible: Always

Comment 1 Jakub Jelinek 2025-01-09 16:26:40 UTC

This built just fine for me in mock with gcc 15, same child.cfg.

Comment 2 Siddhesh Poyarekar 2025-01-17 13:10:13 UTC

Mass rebuild succeeded, so it's either a transient failure or a gcc bug that got fixed recently:

https://koji.fedoraproject.org/koji/buildinfo?buildID=2616380