Ggdb3 does not have effect

Most probably I originally took the Makefile which have had a problem, and did not invest enough into the figuring out how it works.

The problem is that I add -ggdb3 into the CFLAGS, but package size does not change, and I do not see any material debug info in the executable. I am confused there're CFLAGS and TARGET_CFLAGS and how they are being applied during compilation.

Top Makefile has


And build Makefile has

CFLAGS += -Os -Wall -Wpedantic -Wextra -Wshadow -ggdb3 -std=gnu99

and actual make commands are

$(CC) $(LDFLAGS) -o [outfname] [sources] $(LDLIBS) $(CPPFLAGS) $(CFLAGS)

I am sure when I change -W option in CFLAGS they have effect, but when I change -g option nothing changes. Where the issue could be?

Update: I am incorrect. Looking into the build_dir location the executable image inflates considerably when I use -ggdb3 option, but for some reason in output package in bin/packages/[platform]/base the ipk image generated has executable without debug info! WTF?