diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0d54e50..cdf7b60 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,3 +35,10 @@ if(DCFG_BUILD_STATIC)
 	install(TARGETS ${PROJECT_NAME}_static DESTINATION lib)
 endif()
 install(DIRECTORY ${INCLUDE_DIR}/ DESTINATION include)
+
+if(MSVC)
+	target_compile_options(${PROJECT_NAME} PRIVATE /W4 /permissive-)
+else()
+	target_compile_options(${PROJECT_NAME} PRIVATE -Wall -Wextra -pedantic -Werror -Wno-newline-eof)
+endif()
+
diff --git a/src/dcfg.c b/src/dcfg.c
index c224117..2d8fa7f 100644
--- a/src/dcfg.c
+++ b/src/dcfg.c
@@ -961,9 +961,13 @@ dcfg_Value *dcfg_parse(dcfg_Instance *instance,
   }
 
   // FIXME: Get Value * from AST
+  return NULL;
 }
 
-void dcfg_destroy(dcfg_Value *value) {}
+void dcfg_destroy(dcfg_Value *value) {
+  (void)value;
+  // FIXME: Implement
+}
 
 // Libraries
 #include "vendor/utf8proc.c"