Bug 1252934

Summary:	RFE: mpfr without TLS support for GC
Product:	[Fedora] Fedora	Reporter:	Jerry James <loganjerry>
Component:	mpfr	Assignee:	Pavel Cahyna <pcahyna>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	rdieter
Target Milestone:	---	Keywords:	FutureFeature
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OS:	Unspecified
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Fixed In Version:		Doc Type:	Enhancement
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Jerry James 2015-08-12 14:27:40 UTC

Description of problem:
Macaulay2 sometimes crashes with backtraces that include calls into mpfr.  The Macaulay2 developers identified the problem:

  "Compiling mpfr with thread local variables is incompatible with libgc,
   because some libgc pointers are cached in the variables
   gmpfr_cache_const_pi, __gmpfr_cache_const_log2, __gmpfr_cache_const_euler,
   __gmpfr_cache_const_catalan."

They say that Macaulay2 must be linked with an mpfr that has been configured with --disable-thread-safe.  We do not have such a library in Fedora.  Is it possible that two versions of the mpfr library could be built, the optimized one as now, and also perhaps libmpfr-gc.so.<version>?

Note that this will also be a problem for any other application that uses both mpfr and gc.  (Not that I know that there are any such applications...)

Version-Release number of selected component (if applicable):
mpfr-3.1.2-8.fc22.x86_64

How reproducible:
Sometimes.

Steps to Reproduce:
1. Run the Macaulay2 test suite
2.
3.

Actual results:
Sometimes the test suite completes normally, sometimes it segfaults with a backtrace that includes mpfr calls.

Expected results:
Normal completion, always.

Additional info:

Comment 1 Fedora Admin XMLRPC Client 2017-07-21 15:41:37 UTC

This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

Comment 2 Pavel Cahyna 2018-02-25 22:18:19 UTC

Is this still needed? If yes, is there a prior art for this in other distributions?