fixes #6 - build flag for CMakeLists

CQMP · Oct 10, 2016 · bbbf6d0 · bbbf6d0
1 parent 0abd703
commit bbbf6d0
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -25,7 +25,13 @@ message(STATUS "Finding packages, please stand by...")
 find_package(GSL REQUIRED)
 find_package (Eigen3 3.1 REQUIRED)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2 -DNDEBUG -Wno-return-type-c-linkage")
+include(CheckCXXCompilerFlag)
+CHECK_CXX_COMPILER_FLAG(-Wno-return-type-c-linkage SUPPORTS_FLAG)
+if(SUPPORTS_FLAG)
+    list(APPEND CMAKE_CXX_FLAGS "-Wno-return-type-c-linkage")
+endif()
+
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2 -DNDEBUG")
 
 #let gcc take advantage of Eigen3 vectorization
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")