OSX_MIN_VERSION=10.12 OSX_SDK_VERSION=10.15.1 XCODE_VERSION=11.3.1 XCODE_BUILD_ID=11C505 LD64_VERSION=530 OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-libcxx-headers darwin_CC=clang -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(OSX_SDK) -mlinker-version=$(LD64_VERSION) darwin_CXX=clang++ -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(OSX_SDK) -stdlib=libc++ -mlinker-version=$(LD64_VERSION) darwin_CFLAGS=-pipe darwin_CXXFLAGS=$(darwin_CFLAGS) darwin_release_CFLAGS=-O2 darwin_release_CXXFLAGS=$(darwin_release_CFLAGS) darwin_debug_CFLAGS=-O1 darwin_debug_CXXFLAGS=$(darwin_debug_CFLAGS) darwin_native_toolchain=native_cctools