--- a/Makefile
+++ b/Makefile
@@ -120,7 +120,6 @@ ifeq ($(NATIVE), emscripten)
 endif
 # Uncomment below to disable warnings
 #WARNINGS = -w
-DEBUGSYMS = -g
 #PROFILE = -pg
 #OTHERS = -O3
 #DEFINES = -DNDEBUG
@@ -388,8 +387,6 @@ LDFLAGS += $(PROFILE)
 
 ifneq ($(SANITIZE),)
   SANITIZE_FLAGS := -fsanitize=$(SANITIZE) -fno-sanitize-recover=all -fno-omit-frame-pointer
-  CXXFLAGS += $(SANITIZE_FLAGS)
-  LDFLAGS += $(SANITIZE_FLAGS)
 endif
 
 # enable optimizations. slow to build
@@ -478,7 +475,6 @@ else
       OPTLEVEL = -O0
     endif
   endif
-  CXXFLAGS += $(OPTLEVEL)
 endif
 
 ifeq ($(shell sh -c 'uname -o 2>/dev/null || echo not'),Cygwin)
@@ -911,7 +907,6 @@ ifeq ($(TARGETSYSTEM),LINUX)
   endif
   ifeq ($(BACKTRACE),1)
     # -rdynamic needed for symbols in backtraces
-    LDFLAGS += -rdynamic
   endif
 endif