topdir          :=$(dir $(realpath $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))))

CC              ?=cc

CFLAGS          ?=-O2 -g

prefix          ?=/usr/local

exec_prefix     ?=$(prefix)

bindir          ?=$(exec_prefix)/bin

includedir      ?=$(exec_prefix)/include

libdir          ?=$(exec_prefix)/lib

datarootdir     ?=$(prefix)/share

datadir         ?=$(datarootdir)

docdir          ?=$(datarootdir)/doc/musl-compat-$(VERSION)

mandir          ?=$(datarootdir)/man

BINS            := $(notdir $(basename $(wildcard $(topdir)/bin/*.c)))

BINS_SH         := $(notdir $(basename $(basename $(wildcard $(topdir)/bin/*.sh.in))))

INCLUDES        := $(shell find "$(topdir)/include" -type f -name '*.h')

INCLUDES        := $(INCLUDES:$(topdir)/include/%=%)

LIBS            := $(notdir $(wildcard $(topdir)/lib/*.a))

VERSION         =4

build:	$(foreach b,$(BINS),$(topdir)/bin/$(b).o) $(foreach b,$(BINS_SH),$(topdir)/bin/$(b).sh)

$(topdir)/bin/%.sh: $(topdir)/bin/%.sh.in

	cp "$<" "$@"

	chmod +x "$@"

$(topdir)/bin/%.o: $(topdir)/bin/%.c

	$(CC) -I"$(topdir)/include" $(CFLAGS) $(LDFLAGS) "$<" -o "$@"

$(DESTDIR)$(bindir)/%: $(topdir)/bin/$(notdir %)

	install -D -m 755 "$<" "$(basename $@)"

$(DESTDIR)$(includedir)/%: $(topdir)/include/$(notdir %)

	install -D -m 644 "$<" "$@"

$(DESTDIR)$(libdir)/%: $(topdir)/lib/$(notdir %)

	install -D -m 755 "$<" "$@"

install: $(foreach b,$(BINS),$(DESTDIR)$(bindir)/$(b).o) $(foreach b,$(BINS_SH),$(DESTDIR)$(bindir)/$(b).sh) $(foreach i,$(INCLUDES),$(DESTDIR)$(includedir)/$(i)) $(foreach l,$(LIBS),$(DESTDIR)$(libdir)/$(l))

clean:

	rm -rf $(foreach b,$(BINS),$(topdir)/bin/$(b).o) $(foreach b,$(BINS_SH),$(topdir)/bin/$(b).sh)

.PHONY:	all build clean install