Probably also want to build C sources with optimizations

Author: madebr

CMakeLists.txt

@@ -458,6 +458,12 @@ if (MSVC_FOR_DECOMP)
   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "/O2 /D \"NDEBUG\"")
   set(CMAKE_CXX_FLAGS_MINSIZEREL "/Os /D \"NDEBUG\"")
 
+  set(CMAKE_C_FLAGS "/W3 /GX /D \"WIN32\" /D \"_WINDOWS\"")
+  set(CMAKE_C_FLAGS_DEBUG "/Gm /Od /D \"_DEBUG\"")
+  set(CMAKE_C_FLAGS_RELEASE "/O2 /D \"NDEBUG\"")
+  set(CMAKE_C_FLAGS_RELWITHDEBINFO "/O2 /D \"NDEBUG\"")
+  set(CMAKE_C_FLAGS_MINSIZEREL "/Os /D \"NDEBUG\"")
+
   set(CMAKE_EXE_LINKER_FLAGS "/machine:I386")
   set(CMAKE_EXE_LINKER_FLAGS_DEBUG "/incremental:yes /debug")
   set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/incremental:no")