Add fno-omit-frame-pointer which may or not improve future stacktraces

Makefile

@@ -24,9 +24,11 @@ GIT_TAG := $(shell git describe --tags --abbrev=0)
 # -pie -fPIE: For ASLR
 # -g3: More debugging information
 # _FILE_OFFSET_BITS=64: used by stat(). Avoids problems with files > 2 GB on 32bit machines
+# -fsanitize=address: AddressSanitizer
+# -fno-omit-frame-pointer: get nicer stacktraces
 CC=gcc
 HARDENING_FLAGS=-fstack-protector -D_FORTIFY_SOURCE=2 -O3 -Wl,-z,relro,-z,now -pie -fPIE
-DEBUG_FLAGS=-g3 -rdynamic
+DEBUG_FLAGS=-g3 -rdynamic -fno-omit-frame-pointer #-fsanitize=address
 CCFLAGS=-I$(IDIR) -Wall -Wextra -Wno-unused-parameter -D_FILE_OFFSET_BITS=64 $(HARDENING_FLAGS) $(DEBUG_FLAGS) $(CFLAGS)
 LIBS=-pthread -lm