Up warning level to /W4 /WX for MSVC-like compilers

pjohnmeyer · pjohnmeyer · commit 7c1594275161 · 2016-08-27T08:26:05.000-05:00
Also adds a CMake option, UTPP_AMPLIFY_WARNINGS, that can be turned
OFF to disable the new behavior.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -7,6 +7,9 @@ option(UTPP_USE_PLUS_SIGN
 option(UTPP_INCLUDE_TESTS_IN_BUILD
     "Set this to OFF if you do not wish to automatically build or run unit tests as part of the default cmake --build"
     ON)
+option(UTPP_AMPLIFY_WARNINGS
+    "Set this to OFF if you wish to use CMake default warning levels; should generally only use to work around support issues for your specific compiler"
+    ON)
 
 if(MSVC14 OR MSVC12)
     # has the support we need
@@ -23,6 +26,15 @@ else()
     endif()
 endif()
 
+# up warning level for project
+if (${UTPP_AMPLIFY_WARNINGS})
+    # instead of getting compiler specific, we're going to try making an assumption that an existing /W# means
+    # we are dealing with an MSVC or MSVC-like compiler (e.g. Intel on Windows)
+    if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
+        string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /WX")
+    endif()
+endif()
+
 # get the main sources
 file(GLOB headers_ RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} UnitTest++/*.h)
 file(GLOB sources_ RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} UnitTest++/*.cpp)
