Update .cirrus.yml

.cirrus.yml

@@ -4,11 +4,10 @@ macos_instance:
 task:
   name: AppleM1/LLVM
   compile_script:
-  - brew install llvm
-  - export PATH=/opt/homebrew/opt/llvm/bin:$PATH
-  - export LDFLAGS="-L/opt/homebrew/opt/llvm/lib"
-  - export CPPFLAGS="-I/opt/homebrew/opt/llvm/include"
-  - make TARGET=VORTEX CC=clang FC=gfortran
+  - xcodebuild -version
+  - export CC=/Applications/Xcode-14.0.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
+  - export CFLAGS="-O2 -unwindlib=none -Wno-macro-redefined -isysroot /Applications/Xcode-14.0.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk"
+  - make TARGET=VORTEX FC=gfortran
 
 task:
   name: AppleM1/LLVM/ILP64