SDL2_mixer depends on pthread but that dependency is missing from pkgconfig/SDL2_mixer.pc

[Rémy Roy]

I have been trying to compile Cataclysm: Dark Days Aheads which uses SDL2_mixer. In our build process, we ask pkg-config to tell us which libraries should be included for our LDFLAGS. The output from pkg-config is wrong and it should include pthread. See this related issue https://github.com/CleverRaven/Cataclysm-DDA/pull/13984 .

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Description: Ubuntu 15.04
Release: 15.04
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libsdl2-mixer-dev:
  Installed: 2.0.0+dfsg1-5
  Candidate: 2.0.0+dfsg1-5
  Version table:
 *** 2.0.0+dfsg1-5 0
        500 http://us.archive.ubuntu.com/ubuntu/ vivid/universe amd64 Packages
        100 /var/lib/dpkg/status
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I expect all library dependencies to be returned by pkg-config for SDL2_mixer for use in LDFLAGS our the build process.
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pthread is missing as a library from the output of calling `pkg-config SDL2_mixer --libs`
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ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: libsdl2-mixer-dev 2.0.0+dfsg1-5
ProcVersionSignature: Ubuntu 3.19.0-32.37-generic 3.19.8-ckt7
Uname: Linux 3.19.0-32-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.7
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Nov 15 04:32:47 2015
InstallationDate: Installed on 2015-01-20 (298 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: libsdl2-mixer
UpgradeStatus: Upgraded to vivid on 2015-08-07 (99 days ago)

[Rémy Roy (remyroy)]

This bug is incorrect. Sorry for the report. We uses pthread as an additional dependency and it is unrelated to SDL2_mixer. This can be closed.