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IDProjectCategoryView StatusDate SubmittedLast Update
0013834CMakeCMakepublic2013-01-04 07:252013-06-03 09:05
ReporterGert Wollny 
Assigned ToAlexey Ozeritsky 
PrioritynormalSeveritymajorReproducibilityalways
StatusclosedResolutionno change required 
PlatformLinuxOSGentooOS Version
Product VersionCMake 2.8.10.2 
Target VersionFixed in Version 
Summary0013834: FindBLAS doesn't trust pkg-config and may, therefore, fail
DescriptionFindBLAS first tries to locate the BLAS libraries by using pkg-config. However, instead of trusting the returned information, it then tries to locate all libraries given in the returned string within the returned library directory.

When on Gentoo ACML is selected to provide BLAS, this strategy fails, because apart from the acml libraries, libgfortran and libpthread are reported by phk-config and these libraries are not located within the given library directory, since they are in the default library search path.
Steps To Reproduceon Gentoo:

eselect blas set acml-gfortran-openmp

Add to CmakeLists.txt:

FIND_PACKAGE(BLAS)

run cmake

Make Error at /usr/share/cmake/Modules/FindBLAS.cmake:58 (message):
  Something is wrong in your pkg-config file - lib gfortran not found in
  /opt/acml4.4.0/gfortran64_mp/lib
Additional InformationInstead of searching for the libraries, FindBLAS should either just trust pkg-config, or try to link a simple program that requires a BLAS function.

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  Notes
(0031984)
Rolf Eike Beer (developer)
2013-01-05 02:20

 This bug is invalid: the pkg-config support is added by a Gentoo patch, vanilla CMake doesn't have it. In fact I asked the Gentoo folks to push that fix upstream but the answer was something like "Gentoo is the only distro that ships pkg-config files for BLAS, so noone but us needs this". Another instance of crappy Gentoo patches breaking CMake. Please report at their bug tracker.
(0032000)
Gert Wollny (reporter)
2013-01-08 07:35

 Reopened on the Gentoo developers request.

Actually my general experience with Gentoo developers is that they always prefer to get fixes applied upstream.

I reported the bug in Gentoo,
https://bugs.gentoo.org/show_bug.cgi?id=450386 [^]
and this is exactly what Michael Palimaka commented there: That he would happily work with you to incorporate this and other patches.

In the specific case of BLAS they Gentoo developers are actually asking the upstream developers of BLAS packages to include pkg-config files and set up trackers for pkg-config files that are not yet available form upstream.
(0032001)
Rolf Eike Beer (developer)
2013-01-08 08:01

 He can find me as Dakon in #cmake on Freenode where we can sort this out.
(0032002)
Rolf Eike Beer (developer)
2013-01-08 08:04

 Closing bug, as this is still a Gentoo issue. Please open a new bug if someone has a patch to provide the pkg-config functionality (it is a feature request then).

Everything else can either be discussed on cmake-developers@cmake.org or in #cmake on Freenode as it isn't related to this bug itself.
(0033181)
Robert Maynard (manager)
2013-06-03 09:05

 Closing resolved issues that have not been updated in more than 4 months.

 Issue History
Date Modified Username Field Change
2013-01-04 07:25 Gert Wollny New Issue
2013-01-04 09:03 Brad King Assigned To => Alexey Ozeritsky
2013-01-04 09:03 Brad King Status new => assigned
2013-01-05 02:20 Rolf Eike Beer Note Added: 0031984
2013-01-05 02:20 Rolf Eike Beer Status assigned => resolved
2013-01-05 02:20 Rolf Eike Beer Resolution open => no change required
2013-01-08 07:35 Gert Wollny Note Added: 0032000
2013-01-08 07:35 Gert Wollny Status resolved => feedback
2013-01-08 07:35 Gert Wollny Resolution no change required => reopened
2013-01-08 08:01 Rolf Eike Beer Note Added: 0032001
2013-01-08 08:04 Rolf Eike Beer Note Added: 0032002
2013-01-08 08:04 Rolf Eike Beer Status feedback => resolved
2013-01-08 08:04 Rolf Eike Beer Resolution reopened => no change required
2013-06-03 09:05 Robert Maynard Note Added: 0033181
2013-06-03 09:05 Robert Maynard Status resolved => closed

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