-add_compile_options(-Wall -Wno-pointer-sign)
-add_compile_options(-Werror=maybe-uninitialized -Werror=implicit-function-declaration)
+add_compile_options(-Wall -Wextra -Wconversion)
+add_compile_options(-Wno-unused-parameter) # frankly not using a parameter does it care?
+add_compile_options(-Werror=maybe-uninitialized)
+add_compile_options(-Werror=implicit-function-declaration)
+add_compile_options(-Wno-pointer-sign) # for XmlChar handling