ifeq ($(SRC),)
test-src:
	@echo SRC must be set via command line.
	@exit 1
else
test-src:
endif

list-obj-files: test-src
	@# List all .o included in a .a archive.
	ar t $(SRC)
list-symbols: test-src
	@# List all symbols in a .so.
	nm -D $(SRC)
list-symbols-alt: test-src
	@# Alternative: grep .text section in an objdump output.
	objdump -T $(SRC) | grep text