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-rw-r--r--Makefile40
1 files changed, 36 insertions, 4 deletions
diff --git a/Makefile b/Makefile
index ad695e32..7c7dd087 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,37 @@
-all:
- $(CC) -Wall -Os -s $(CFLAGS) -I . main.c toys/*.c lib/*.c -o toybox
+# Makefile for toybox.
+# Copyright 2006 Rob Landley <rob@landley.net>
-clean:
- rm toybox
+CFLAGS = -Wall -Os -s
+CC = $(CROSS_COMPILE)gcc $(CFLAGS)
+HOST_CC = gcc $(CFLAGS)
+
+all: toybox
+
+.PHONY: clean
+
+include kconfig/Makefile
+
+# 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' $< > $@
+
+# Actual build
+
+toyfiles = main.c toys/*.c lib/*.c
+toybox: gen_config.h $(toyfiles)
+ $(CC) -Wall -Os -s -funsigned-char $(CFLAGS) -I . \
+ $(toyfiles) -o toybox
+
+clean::
+ rm -f toybox gen_config.h
+
+distclean: clean
+ rm -f .config