annotate Makefile @ 45:e60d48d30ef0

Make some of gcc 4.1's dumber warnings go away.
author Rob Landley <rob@landley.net>
date Sun, 31 Dec 2006 19:09:42 -0500
parents 72ff42c01d92
children 6b933d9c54ac
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f8e628f61f16 Make the config generate gen_config.h with CFG_ and USE() macros.
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1 # Makefile for toybox.
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2 # Copyright 2006 Rob Landley <rob@landley.net>
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4 CFLAGS = -Wall -Wundef -Wno-char-subscripts -Os
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b707dfcd403c Reduce flag duplication and make kconfig use HOST_CC.
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5 CC = $(CROSS_COMPILE)gcc $(CFLAGS) -funsigned-char
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6 STRIP = $(CROSS_COMPILE)strip
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7 HOST_CC = gcc $(CFLAGS) -funsigned-char
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9 all: toybox
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11 .PHONY: clean
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13 include kconfig/Makefile
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15 .config: Config.in toys/Config.in
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17 # The long and roundabout sed is to make old versions of sed happy. New ones
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18 # have '\n' so can replace one line with two without all the branches and
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19 # mucking about with hold space.
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20 gen_config.h: .config
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21 sed -n -e 's/^# CONFIG_\(.*\) is not set.*/\1/' \
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22 -e 't notset' -e 'b tryisset' -e ':notset' \
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23 -e 'h' -e 's/.*/#define CFG_& 0/p' \
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24 -e 'g' -e 's/.*/#define USE_&(...)/p' -e 'd' -e ':tryisset' \
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25 -e 's/^CONFIG_\(.*\)=y.*/\1/' -e 't isset' -e 'd' -e ':isset' \
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26 -e 'h' -e 's/.*/#define CFG_& 1/p' \
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27 -e 'g' -e 's/.*/#define USE_&(...) __VA_ARGS__/p' $< > $@
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29 # Development targets
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30 baseline: toybox_unstripped
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31 @cp toybox_unstripped toybox_old
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32
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33 bloatcheck: toybox_old toybox_unstripped
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34 @scripts/bloat-o-meter toybox_old toybox_unstripped
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36 # Actual build
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38 toyfiles = main.c toys/*.c lib/*.c
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39 toybox_unstripped: gen_config.h $(toyfiles) toys/toylist.h lib/lib.h toys.h
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40 $(CC) $(CFLAGS) -I . $(toyfiles) -o toybox_unstripped \
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41 -ffunction-sections -fdata-sections -Wl,--gc-sections \
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42 2>&1 | sed -n -e '/may be used uninitialized/{s/.*/\n/;h;b};1{x;b};: print;x;/\n/b thing;p;: thing;${x;p}' >&2
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44 toybox: toybox_unstripped
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45 $(STRIP) toybox_unstripped -o toybox
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46 clean::
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47 rm -f toybox toybox_old toybox_unstripped gen_config.h
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49 distclean: clean
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50 rm -f .config*
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52 help::
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53 @echo ' baseline - Create busybox_old for use by bloatcheck.'
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54 @echo ' bloatcheck - Report size differences between old and current versions'