Add macOS support #34

cmake/flags.cmake

@@ -35,13 +35,9 @@ list(APPEND PROJECT_CXXFLAGS_LIST
   -Wcast-align
   -Wconversion
   -Wdouble-promotion
-  -Wduplicated-branches
-  -Wduplicated-cond
   -Wextra
   -Wformat=2
-  -Wlogical-op
   -Wmisleading-indentation
-  -Wno-useless-cast
   -Wnon-virtual-dtor
   -Wnull-dereference
   -Wold-style-cast
@@ -52,6 +48,15 @@ list(APPEND PROJECT_CXXFLAGS_LIST
   -Wunused
 )
 
+if (NOT PROJECT_IS_DARWIN)
+  list(APPEND PROJECT_CXXFLAGS_LIST 
+    -Wduplicated-branches
+    -Wduplicated-cond
+    -Wlogical-op
+    -Wno-useless-cast
+  )
+endif()
+
 list(APPEND PROJECT_CFLAGS_LIST
   ${PROJECT_COMMON_FLAG_LIST}
   -std=c${CMAKE_C_STANDARD}