Review Request 129119: Fix HAVE_TRUNC cmake check

[Albert Astals Cid]

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https://git.reviewboard.kde.org/r/129119/
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Review request for Build System and kdelibs.


Repository: kdelibs


Description
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On newer distros the check fails because trunc is ambiguous, so tell sizeof exactly which trunc we're speaking about.


Diffs
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  ConfigureChecks.cmake 2729adb 
  cmake/modules/CheckPrototypeExists.cmake 811d648 

Diff: https://git.reviewboard.kde.org/r/129119/diff/


Testing
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kdelibs compiles (a bit more, there's still an unrelated issue)


Thanks,

Albert Astals Cid

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