D26273: cmake: don't use taglib-config if we are cross compiling

[Bhushan Shah]

bshah created this revision.
bshah added a reviewer: vkrause.
Herald added projects: Frameworks, Baloo.
Herald added subscribers: Baloo, kde-frameworks-devel.
bshah requested review of this revision.

REVISION SUMMARY
  If we are cross compiling two things are possible,
  
  - cmake finds host taglib-config
  - cmake finds target taglib-config in sysroot
  
  depending on toolchain configuration. In both cases taglib-config values
  are useless since, we can't link to host libraries or can't run target
  taglib-config in most cases.

TEST PLAN
  tested it finds the taglib from sysroot when cross compiling

REPOSITORY
  R286 KFileMetaData

BRANCH
  bshah/cross

REVISION DETAIL
  https://phabricator.kde.org/D26273

AFFECTED FILES
  cmake/FindTaglib.cmake

To: bshah, vkrause
Cc: kde-frameworks-devel, #baloo, hurikhan77, lots0logs, LeGast00n, fbampaloukas, GB_2, domson, ashaposhnikov, michaelh, astippich, spoorun, ngraham, bruns, abrahams
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