If I set CMAKE_OSX_ARCHITECTURES to x86_64;arm64 with XCode 11.3.1 (macos 10.14.6) I confirm that it just doesn’t work:
CMake Error at /Applications/CLion.app/Contents/bin/cmake/mac/share/cmake-3.17/Modules/CMakeTestCCompiler.cmake:60 (message):
The C compiler
"/Applications/Xcode11.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc"
is not able to compile a simple test program.
It fails with the following output:
Change Dir: /Volumes/Vault/deployment/build/vst-sam-spl-64/Debug/CMakeFiles/CMakeTmp
Run Build Command(s):/usr/bin/make cmTC_7d8db/fast && /Applications/Xcode11.3.1.app/Contents/Developer/usr/bin/make -f CMakeFiles/cmTC_7d8db.dir/build.make CMakeFiles/cmTC_7d8db.dir/build
Building C object CMakeFiles/cmTC_7d8db.dir/testCCompiler.c.o
/Applications/Xcode11.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -arch x86_64 -arch arm64 -isysroot /Applications/Xcode11.3.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -mmacosx-version-min=10.14 -o CMakeFiles/cmTC_7d8db.dir/testCCompiler.c.o -c /Volumes/Vault/deployment/build/vst-sam-spl-64/Debug/CMakeFiles/CMakeTmp/testCCompiler.c
Linking C executable cmTC_7d8db
/Applications/CLion.app/Contents/bin/cmake/mac/bin/cmake -E cmake_link_script CMakeFiles/cmTC_7d8db.dir/link.txt --verbose=1
/Applications/Xcode11.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -arch x86_64 -arch arm64 -isysroot /Applications/Xcode11.3.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -mmacosx-version-min=10.14 -Wl,-search_paths_first -Wl,-headerpad_max_install_names CMakeFiles/cmTC_7d8db.dir/testCCompiler.c.o -o cmTC_7d8db
ld: warning: ignoring file /Applications/Xcode11.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.0/lib/darwin/libclang_rt.osx.a, missing required architecture arm64 in file /Applications/Xcode11.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.0/lib/darwin/libclang_rt.osx.a (3 slices)
ld: warning: ignoring file /Applications/Xcode11.3.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/lib/libSystem.tbd, missing required architecture arm64 in file /Applications/Xcode11.3.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/lib/libSystem.tbd
ld: dynamic main executables must link with libSystem.dylib for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [cmTC_7d8db] Error 1
make: *** [cmTC_7d8db/fast] Error 2
So any idea of how I can test for architecture support?
Thanks