[CMakeLists.txt] Making sure compilation flags are only for UNIX as they do not work on WIN32.

Author: Murilo M. Marinho

CMakeLists.txt

@@ -9,7 +9,9 @@ project(dqroboticspython)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-add_compile_options(-Werror=return-type -Wall -Wextra -Wmissing-declarations -Wredundant-decls -Woverloaded-virtual -fPIC)
+if(UNIX)
+    add_compile_options(-Werror=return-type -Wall -Wextra -Wmissing-declarations -Wredundant-decls -Woverloaded-virtual -fPIC)
+endif()
 
 if(APPLE)
     message("Building not supported on this platform.")