Makefile

   1 uname_S = $(shell sh -c 'uname -s 2>/dev/null || echo not')
   2 uname_O = $(shell sh -c 'uname -o 2>/dev/null || echo not')
   3
   4 # compiler enviroment
   5 MKDIR = mkdir
   6 CC = gcc
   7 CPPFLAGS = -D_GNU_SOURCE
   8 CFLAGS = -g -static -Wall
   9 LDFLAGS = -g -static -Wall
  10 ifeq ($(uname_O), Cygwin)
  11         CFLAGS = -g -Wall
  12         LDFLAGS = -g -Wall
  13 endif
  14 LDLIBS =
  15
  16 # project setting
  17 NODEPS = clean
  18 OUTDIR = out# only support current directory now :(
  19 SOURCES = $(wildcard *.c)
  20 TARGET = $(OUTDIR)/init
  21 PACKAGE = $(OUTDIR)/rootfs.cpio.gz
  22 OBJECTS = $(patsubst %.c, $(OUTDIR)/%.o, ${SOURCES})
  23 DEPFILES = $(patsubst %.c, $(OUTDIR)/%.d, ${SOURCES})
  24
  25 # link target
  26 $(TARGET):$(OBJECTS)
  27         @$(MKDIR) -p $(OUTDIR)
  28         $(CC) $(LDFLAGS) $^ -o $@
  29
  30 $(PACKAGE) : $(TARGET)
  31         @rm -rf out/package; \
  32         mkdir -p out/package; \
  33         cd out/package; \
  34         cp ../init .; \
  35         find . | cpio -o -H newc | gzip > ../rootfs.cpio.gz
  36
  37 # dependency
  38 #ifneq ($(MAKECMDGOALS), clean)
  39 -include $(DEPFILES)
  40 #endif
  41
  42 #$(OUTDIR)/%.d:%.c
  43 #       @$(MKDIR) -p $(OUTDIR)
  44 #       set -e; rm -f $@; \
  45 #       $(CC) -MM $(CPPFLAGS) $< > $@.$$$$; \
  46 #       sed 's,\($*\)\.o[ :]*,$(OUTDIR)/\1.o $@ : ,g' < $@.$$$$ > $@; \
  47 #       sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
  48 #           -e '/^$$/ d' -e 's/$$/ :/' < $@.$$$$ >> $@; \
  49 #       rm -f $@.$$$$
  50
  51 # compile
  52 $(OUTDIR)/%.o:%.c
  53         @$(MKDIR) -p $(OUTDIR)
  54         @set -e;rm -f $(@:.o=.d); \
  55         $(CC) -MM $(CPPFLAGS) $< > $(@:.o=.d).$$$$; \
  56         sed 's,\($*\)\.o[ :]*,$(OUTDIR)/\1.o $@ : ,g' < $(@:.o=.d).$$$$ > $(@:.o=.d); \
  57         sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
  58                 -e '/^$$/ d' -e 's/$$/ :/' < $(@:.o=.d).$$$$ >> $(@:.o=.d); \
  59         rm -f $(@:.o=.d).$$$$;
  60         $(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
  61
  62 .PHONY:clean package
  63 clean:
  64         @echo clean project...
  65         -rm -rf $(OUTDIR)
  66
  67 package : $(PACKAGE)