Only add GCC Clang warnings options in GCC/Clang

Author: traversaro

CMakeLists.txt

@@ -90,8 +90,11 @@ set(${PROJECT_NAME}_HEADERS
     include/${PROJECT_NAME}/eiquadprog-utils.hxx)
 
 add_library(${PROJECT_NAME} src/eiquadprog-fast.cpp src/eiquadprog.cpp)
-target_compile_options(${PROJECT_NAME} PRIVATE "-Wno-sign-conversion"
-)# We have a lot of implicit size_t to Eigen::Index conversions
+
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+  # We have a lot of implicit size_t to Eigen::Index conversions
+  target_compile_options(${PROJECT_NAME} PRIVATE "-Wno-sign-conversion")
+endif()
 
 if(TRACE_SOLVER)
   target_compile_definitions(${PROJECT_NAME} PRIVATE EIQGUADPROG_TRACE_SOLVER)