Define _DARWIN_C_SOURCE when building on Mac

Review Request #117682 - Created April 21, 2014 and submitted

Information
Allen Winter
extra-cmake-modules
master
Reviewers
buildsystem, extracmakemodules, kdeframeworks
harald
Must define _DARWIN_C_SOURCE on the Mac in order to get the declarations for readlink(), setegid(), seteuid(), etc 
i.e for Single Unix Standard v3 (SUSv3) conformance 
works on the Mac
didn't break the build on Linux
Allen Winter
Alex Merry
Allen Winter
Kevin Ottens
Alex Merry
Commit Hook
Allen Winter
Review request changed

Status: Closed (submitted)

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