Makefile

# Makefile for toybox.
# Copyright 2006 Rob Landley <rob@landley.net>

CFLAGS  := $(CFLAGS) -Wall -Wundef -Wno-char-subscripts -Os
CCFLAGS = $(CFLAGS) -funsigned-char
CC      = $(CROSS_COMPILE)gcc
STRIP   = $(CROSS_COMPILE)strip
HOSTCC  = gcc

# A synonym.
CROSS_COMPILE = $(CROSS)

all: toybox

.PHONY: clean

include kconfig/Makefile

# defconfig is the "maximum sane config"; allyesconfig minus debugging and such.
defconfig: allyesconfig
	@sed -i -r -e "s/^(CONFIG_TOYBOX_(DEBUG|FREE))=.*/# \1 is not set/" .config

.config: Config.in toys/Config.in

# The long and roundabout sed is to make old versions of sed happy.  New ones
# have '\n' so can replace one line with two without all the branches and
# mucking about with hold space.
gen_config.h: .config
	sed -n -e 's/^# CONFIG_\(.*\) is not set.*/\1/' \
	  -e 't notset' -e 'b tryisset' -e ':notset' \
	  -e 'h' -e 's/.*/#define CFG_& 0/p' \
	  -e 'g' -e 's/.*/#define USE_&(...)/p' -e 'd' -e ':tryisset' \
	  -e 's/^CONFIG_\(.*\)=y.*/\1/' -e 't isset' -e 'd' -e ':isset' \
	  -e 'h' -e 's/.*/#define CFG_& 1/p' \
	  -e 'g' -e 's/.*/#define USE_&(...) __VA_ARGS__/p' $< > $@

# Development targets
baseline: toybox_unstripped
	@cp toybox_unstripped toybox_old

bloatcheck: toybox_old toybox_unstripped
	@scripts/bloat-o-meter toybox_old toybox_unstripped

# Get list of toys/*.c files from .config

toysfiles = $(shell sed -nre 's/^CONFIG_(.*)=y/\1/;t skip;b;:skip;s/_.*//;p' .config | sort -u | tr A-Z a-z | grep -v '^toybox$$' | sed 's@\(.*\)@toys/\1.c@')

# Compile toybox from source

toyfiles = main.c lib/*.c $(toysfiles)
toybox_unstripped: gen_config.h $(toyfiles) toys/toylist.h lib/*.h toys.h
	$(CC) $(CCFLAGS) -I . $(toyfiles) -o toybox_unstripped \
		-ffunction-sections -fdata-sections -Wl,--gc-sections

toybox: toybox_unstripped
	$(STRIP) toybox_unstripped -o toybox

instlist: toybox
	$(HOSTCC) $(CCFLAGS) -I . scripts/install.c -o instlist

install_flat: instlist
	@mkdir -p $(PREFIX)/
	@cp toybox $(PREFIX)/
	@for i in `./instlist`; do ln -s toybox "$(PREFIX)/$$i"; done

clean::
	rm -f toybox toybox_old toybox_unstripped gen_config.h instlist

distclean: clean
	rm -f .config*

help::
	@echo  '  baseline        - Create busybox_old for use by bloatcheck.'
	@echo  '  bloatcheck      - Report size differences between old and current versions'