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Bug 1906697

Summary:	ceph fails to build: error: no type named 'type' in 'struct std::enable_if<false, std::basic_ostream<char>&>'
Product:	[Fedora] Fedora	Reporter:	Tomáš Hrnčiar <thrnciar>
Component:	ceph	Assignee:	Kaleb KEITHLEY <kkeithle>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	adeza, branto, danmick, david, fedora, i, josef, kkeithle, loic, mhroncok, mpolacek, ramkrsna, steve, thrnciar
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	ceph-15.2.8-1.fc34	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-01-05 11:44:50 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1868278, 1890881

Description Tomáš Hrnčiar 2020-12-11 07:52:44 UTC

ceph fails to build with Python 3.10.0a3.

/usr/include/c++/11/ostream:773:5: error: no type named 'type' in 'struct std::enable_if<false, std::basic_ostream<char>&>'
...
gmake[2]: Leaving directory '/builddir/build/BUILD/ceph-15.2.7/build/x86_64-redhat-linux-gnu'
[ 83%] Built target unittest_rbd_mirror
gmake[1]: Leaving directory '/builddir/build/BUILD/ceph-15.2.7/build/x86_64-redhat-linux-gnu'
gmake: *** [Makefile:163: all] Error 2

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.10/fedora-rawhide-x86_64/01823946-ceph/

For all our attempts to build ceph with Python 3.10, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/package/ceph/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.10:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/

Let us know here if you have any questions.

Python 3.10 will be included in Fedora 35. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.10.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.

Comment 1 Miro Hrončok 2020-12-11 14:12:01 UTC

This is not limited to Python 3.10: https://koschei.fedoraproject.org/package/ceph?collection=f34

Comment 2 Marek Polacek 2020-12-15 20:05:51 UTC

This is a GCC 11 bug: https://gcc.gnu.org/PR98231.  Please wait a little bit; we'll sort it out in GCC upstream.

Comment 3 Kaleb KEITHLEY 2021-01-05 11:44:50 UTC

fixed (work-around pending gcc-11 bugfix) in ceph-15.2.8-1.fc34

Comment 4 Marek Polacek 2021-01-13 22:21:18 UTC

I just pushed a fix for the GCC bug.  It should make its way downstream before long, and you should be able to remove the workaround then.