Optional warnings added. These are only used if supported by the

compiler.

CMakeLists.txt

@@ -15,6 +15,7 @@ else()
     message(STATUS "Build Type : None")
 endif()
 
+include(Compiler)
 
 if( COVERAGE )
     include(Coverage)
@@ -28,6 +29,12 @@ add_compile_options(-Wall
                     -Wshadow
                     -Wold-style-cast
                     )
+add_compile_options_if_supported(-Wduplicated-cond
+                                -Wduplicated-branches
+                                -Wlogical-op
+                                -Wnull-dereference
+                                -Wuseless-cast
+                                )
 
 
 set(CMAKE_CXX_STANDARD 14)

cmake/Compiler.cmake

@@ -0,0 +1,13 @@
+include(CheckCXXCompilerFlag)
+
+function(add_compile_options_if_supported)
+    foreach(flag ${ARGN})
+        set(option_var option_supported_${flag})
+        CHECK_CXX_COMPILER_FLAG(${flag} ${option_var})
+
+        if( ${option_var} )
+            add_compile_options(${flag})
+        endif()
+    endforeach()
+endfunction()
+