GNU Make is a Command Line Interfacetool to build software programs.

Sample Makefile

PROGRAM_NAME=myprog
CC=gcc
SRC := naive
BIN := bin

CSRC := $(wildcard $(SRC)/*.c)
BINS := $(patsubst $(SRC)/%.c, $(BIN)/%, $(CSRC))

all: $(BINS)

$(BIN)/%: $(SRC)/%.c
    $(CC) $(CC_FLAGS) -o $@ $< 

run:
    ./$(BIN)/${PROGRAM_NAME}

clean:
    -@ $(RM) $(BINS)

Setting Shell

SHELL is probably best set to Bash
.SHELLFLAGS can pass flags to make bash be Strict and fail early.
.ONESHELL ensures everything is run in one shell session, rather

than new shell per line. Can do loops and variable assignments.

SHELL := bash
.ONESHELL:
.SHELLFLAGS := -eu -o pipefail -c