diff --git a/Makefile b/Makefile
index c26a6d6aa..aa2cd2a72 100644
--- a/Makefile
+++ b/Makefile
@@ -37,7 +37,7 @@ else # !COMSPEC
 endif # COMSPEC
 
 ifndef CXXFLAGS
-    CXXFLAGS=-O2 -DNDEBUG -Wall
+    CXXFLAGS=-pedantic -Wall -Wextra -Wabi -Wcast-qual -Wfloat-equal -Winline -Wmissing-declarations -Wmissing-format-attribute -Wno-long-long -Woverloaded-virtual -Wpacked -Wredundant-decls -Wshadow -Wsign-promo $(CPPCHK_GLIBCXX_DEBUG) -g
 endif
 
 ifeq ($(HAVE_RULES),yes)