libprof/Makefile

#! /usr/bin/make -f
# libprof Makefile

cflags := -m3 -mb -ffreestanding -nostdlib -fstrict-volatile-bitfields -Wall \
          -Wextra -Os -I .
target ?= sh-elf
lib    := libprof.a
header := libprof.h

PREFIX ?= $(shell $(target)-gcc -print-search-dirs | grep install \
                  | sed 's/install: //')

ifeq "$(PREFIX)" ""
$(error "Cannot determine compiler install path")
endif

src := $(wildcard *.c)
obj := $(src:%=build/%.o)

# Rules

all: $(lib)

$(lib): $(obj)
	$(target)-ar rcs $@ $^

build/%.c.o: %.c | build/
	$(target)-gcc -c $< -o $@ $(cflags)

# Misc rules

clean:
	@ rm -rf build
distclean: clean
	@ rm -f $(lib)

%/:
	mkdir -p $@

.PRECIOUS: %/

# Install

install:
	cp $(lib) $(DESTDIR)$(PREFIX)
	cp $(header) $(DESTDIR)$(PREFIX)/include