try again

.github/workflows/cmake.yml

@@ -46,6 +46,9 @@ jobs:
       # We'll use this as our working directory for all subsequent commands
       run: cmake -E make_directory ${{github.workspace}}/build
 
+    - name: print libc++ version
+      run: COMMAND echo "#include <cstdint>\nint main () {}" | clang-9 -E --std=c++2a -stdlib=libc++ -x c++ -dM - | grep _LIBCPP_VERSION
+
     - name: Configure CMake
       # Use a bash shell so we can use the same syntax for environment variable
       # access regardless of the host operating system

CMakeLists.txt

@@ -56,7 +56,6 @@ if(CMAKE_CXX_COMPILER_ID MATCHES ".*Clang")
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stdlib=libc++ -lc++abi")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
     set(PROJECT_WARNINGS ${CLANG_WARNINGS})
-    execute_process(COMMAND printf "#include <cstdint>\nint main () {}" | clang-9 -E --std=c++2a -stdlib=libc++ -x c++ -dM - | grep _LIBCPP_VERSION)
     target_compile_options(test_rgbcx PUBLIC ${PROJECT_WARNINGS})
 endif()
 set(CMAKE_CXX_FLAGS_DEBUG "-g")