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From: "David Byron" <dbyron@hheld.com>
To: "'Josh Boyer'" <jwboyer@gmail.com>
Subject: RE: autoconf for mtd-utils
Date: Mon, 31 Jul 2006 10:47:12 -0700
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On Sun, 2006-07-30 at 11:10a, Josh Boyer wrote:

> Something like that.  But leave the definition of CROSS alone.  It's
> better to leave the trailing '-' at the end so that if other cross
> tools are needed, you just specify $(CROSS)ld, etc.

How's this?

-DB

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diff --git a/Makefile b/Makefile=0A=
index 37cd7f7..683ddbf 100644=0A=
--- a/Makefile=0A=
+++ b/Makefile=0A=
@@ -10,7 +10,14 @@ #CROSS=3Darm-linux-=0A=
 CC :=3D $(CROSS)gcc=0A=
 CFLAGS :=3D -I./include -O2 -Wall=0A=
 =0A=
-TARGETS =3D ftl_format flash_erase flash_eraseall nanddump doc_loadbios =
\=0A=
+ifeq ($(origin CROSS),undefined)=0A=
+  BUILDDIR :=3D .=0A=
+else=0A=
+# Remove the trailing slash to make the directory name=0A=
+  BUILDDIR :=3D $(CROSS:-=3D)=0A=
+endif=0A=
+=0A=
+RAWTARGETS =3D ftl_format flash_erase flash_eraseall nanddump =
doc_loadbios \=0A=
 	mkfs.jffs ftl_check mkfs.jffs2 flash_lock flash_unlock flash_info \=0A=
 	flash_otp_info flash_otp_dump mtd_debug flashcp nandwrite \=0A=
 	jffs2dump \=0A=
@@ -18,40 +25,48 @@ TARGETS =3D ftl_format flash_erase flash_e=0A=
 	rfddump rfdformat \=0A=
 	sumtool #jffs2reader=0A=
 =0A=
+TARGETS =3D $(foreach target,$(RAWTARGETS),$(BUILDDIR)/$(target))=0A=
+=0A=
 SYMLINKS =3D=0A=
 =0A=
 %: %.o=0A=
-	$(CC) $(LDFLAGS) -g -o $@ $^=0A=
+	$(CC) $(CFLAGS) $(LDFLAGS) -g -o $@ $^=0A=
 =0A=
-%.o: %.c=0A=
-	$(CC) $(CFLAGS) -g -c -o $@ $< -g -Wp,-MD,.$<.dep=0A=
+$(BUILDDIR)/%.o: %.c=0A=
+	mkdir -p $(BUILDDIR)=0A=
+	$(CC) $(CFLAGS) -g -c -o $@ $< -g -Wp,-MD,$(BUILDDIR)/.$(<F).dep=0A=
 =0A=
 .SUFFIXES:=0A=
 =0A=
 all: $(TARGETS)=0A=
 =0A=
-IGNORE=3D${wildcard .*.c.dep}=0A=
+IGNORE=3D${wildcard $(BUILDDIR)/.*.c.dep}=0A=
 -include ${IGNORE}=0A=
 =0A=
 clean:=0A=
-	rm -f *.o $(TARGETS) .*.c.dep $(SYMLINKS)=0A=
+	rm -f $(BUILDDIR)/*.o $(TARGETS) $(BUILDDIR)/.*.c.dep $(SYMLINKS)=0A=
+	if [ "$(BUILDDIR)x" !=3D ".x" ]; then rm -rf $(BUILDDIR); fi=0A=
 =0A=
 $(SYMLINKS):=0A=
 	ln -sf ../fs/jffs2/$@ $@=0A=
 =0A=
-mkfs.jffs2: crc32.o compr_rtime.o mkfs.jffs2.o compr_zlib.o compr.o=0A=
+$(BUILDDIR)/mkfs.jffs2: $(BUILDDIR)/crc32.o \=0A=
+			$(BUILDDIR)/compr_rtime.o \=0A=
+			$(BUILDDIR)/mkfs.jffs2.o \=0A=
+			$(BUILDDIR)/compr_zlib.o \=0A=
+			$(BUILDDIR)/compr.o=0A=
 	$(CC) $(LDFLAGS) -o $@ $^ -lz=0A=
 =0A=
-flash_eraseall: crc32.o flash_eraseall.o=0A=
+$(BUILDDIR)/flash_eraseall: $(BUILDDIR)/crc32.o =
$(BUILDDIR)/flash_eraseall.o=0A=
 	$(CC) $(LDFLAGS) -o $@ $^=0A=
 =0A=
-jffs2reader: jffs2reader.o=0A=
+$(BUILDDIR)/jffs2reader: $(BUILDDIR)/jffs2reader.o=0A=
 	$(CC) $(LDFLAGS) -o $@ $^ -lz=0A=
 =0A=
-jffs2dump: jffs2dump.o crc32.o=0A=
+$(BUILDDIR)/jffs2dump: $(BUILDDIR)/jffs2dump.o $(BUILDDIR)/crc32.o=0A=
 	$(CC) $(LDFLAGS) -o $@ $^=0A=
 =0A=
-sumtool: sumtool.o crc32.o=0A=
+$(BUILDDIR)/sumtool: $(BUILDDIR)/sumtool.o $(BUILDDIR)/crc32.o=0A=
 	$(CC) $(LDFLAGS) -o $@ $^=0A=
 =0A=
 install: ${TARGETS}=0A=

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