Dead simple makefile (in this case for building openssl bins).

Makefile

# CC = gcc # Optional. Will use system default if not given here e.g. gcc or clang.
CFLAGS  = -g -Wall -fanalyzer $(shell pkg-config --cflags openssl)
LIBS=$(shell pkg-config --libs openssl)
LDFLAGS = $(LIBS)

bins = decrypt_file encrypt_file
all: $(bins)

clean:
	@for file in $(bins); do	\
		$(RM) $${file};	\
		$(RM) $${file}.o; \
	done; \
	$(RM) testdecrypt.txt; \
	$(RM) testout.crypt