Add support for legacy C test code compilation under Clang in CMake

Author: alessandrograssi-dev

tests/CMakeLists.txt

@@ -2,6 +2,11 @@ add_executable(test_parity test_csv.cpp)
 target_link_libraries(test_parity csvcpp)
 target_include_directories(test_parity PRIVATE ${CMAKE_SOURCE_DIR}/csvcpp/include)
 
+# Allow legacy-style C test code to compile under clang++
+if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+	target_compile_options(test_parity PRIVATE -fpermissive -Wno-writable-strings)
+endif()
+
 # Enable testing
 enable_testing()
 add_test(NAME test_parity COMMAND test_parity)