Compile fails with Xcode CMake generator

[jasonhorsburgh]

If I'm using the Xcode generator when building assimp I will get a compile failure trying to link against the gtest library due to the file being in the wrong location.

I believe the issue is caused by the fact that Xcode puts the built libraries into a folder with the configuration name (similar to MSVC) whereas assimp is expecting them to be placed in the root build folder.
What I suspect to be the offending code:
AddGTest.cmake

if (MSVC)
  set(RELEASE_LIB_DIR ReleaseLibs)
  set(DEBUG_LIB_DIR DebugLibs)
else()
  set(RELEASE_LIB_DIR "")
  set(DEBUG_LIB_DIR "")
endif()

I think that this can be fixed by testing to see if XCODE_VERSION is set and setting the appropriate directories but I'm not sure what else would need to change.

OS X version: 10.11.2
Xcode version: 7.2
CMake version: 3.3.2

Xcode error output from cmake -G Xcode .. && cmake --build .

Ld build/test/Debug/unit normal x86_64
cd /tmp/assimp
export MACOSX_DEPLOYMENT_TARGET=10.11
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -L/tmp/assimp/build/test/Debug -L/tmp/assimp/build/test/gtest/src/gtest-build/Debug -L/tmp/assimp/build/test/gtest/src/gtest-build -L/tmp/assimp/build/Debug -L/tmp/assimp/build -F/tmp/assimp/build/test/Debug -filelist /tmp/assimp/build/test/Assimp.build/Debug/unit.build/Objects-normal/x86_64/unit.LinkFileList -Xlinker -rpath -Xlinker /tmp/assimp/build/test/gtest/src/gtest-build -Xlinker -rpath -Xlinker /tmp/assimp/build -mmacosx-version-min=10.11 -Wl,-search_paths_first -Wl,-headerpad_max_install_names /tmp/assimp/build/code/Debug/libassimpd.3.2.0.dylib /tmp/assimp/build/test/gtest/src/gtest-build//libgtest.a /usr/lib/libz.dylib -Xlinker -dependency_info -Xlinker /tmp/assimp/build/test/Assimp.build/Debug/unit.build/Objects-normal/x86_64/unit_dependency_info.dat -o /tmp/assimp/build/test/Debug/unit
clang: error: no such file or directory: '/tmp/assimp/build/test/gtest/src/gtest-build//libgtest.a'

[kimkulling]

Thank you very much for the hint. I tried to fix it. Please try it again with the latest master and give some feedback. Unfortunately I don't have any mac-systems to test the cmake-environment there.

[kimkulling]

When the issue still exists please just open the issue again.

Thanks a lot!
Kimmi