From f93286397ed2a7084efb0362a43ee09f11702349 Mon Sep 17 00:00:00 2001
From: Marian Balakowicz <m8@semihalf.com>
Date: Fri, 1 Sep 2006 19:49:50 +0200
Subject: Add support for a saving build objects in a separate directory.
 Modifications are based on the linux kernel approach and support two use
 cases:

  1) Add O= to the make command line
  'make O=/tmp/build all'

  2) Set environement variable BUILD_DIR to point to the desired location
  'export BUILD_DIR=/tmp/build'
  'make'

The second approach can also be used with a MAKEALL script
'export BUILD_DIR=/tmp/build'
'./MAKEALL'

Command line 'O=' setting overrides BUILD_DIR environent variable.

When none of the above methods is used the local build is performed and
the object files are placed in the source directory.
---
 tools/gdb/Makefile | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

(limited to 'tools/gdb')

diff --git a/tools/gdb/Makefile b/tools/gdb/Makefile
index e7618b762..dbcb91f5e 100644
--- a/tools/gdb/Makefile
+++ b/tools/gdb/Makefile
@@ -1,4 +1,7 @@
 #
+# (C) Copyright 2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
 # (C) Copyright 2000
 # Murray Jensen <Murray.Jensen@csiro.au>
 #
@@ -25,7 +28,11 @@ include $(TOPDIR)/config.mk
 
 BINS	= gdbsend gdbcont
 
-OBJS	= gdbsend.o gdbcont.o error.o remote.o serial.o
+COBJS	= gdbsend.o gdbcont.o error.o remote.o serial.o
+
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SRCS	:= $(COBJS:.o=.c) 
+BINS	:= $(addprefix $(obj),$(BINS))
 
 #
 # Use native tools and options
@@ -44,26 +51,26 @@ all:
 
 else	# ! CYGWIN
 
-all:	$(BINS)
+all:	$(obj).depend $(BINS)
 
-gdbsend:	gdbsend.o error.o remote.o serial.o
+$(obj)gdbsend:	$(obj)gdbsend.o $(obj)error.o $(obj)remote.o $(obj)serial.o
 		$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
 
-gdbcont:	gdbcont.o error.o remote.o serial.o
+$(obj)gdbcont:	$(obj)gdbcont.o $(obj)error.o $(obj)remote.o $(obj)serial.o
 		$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
 
 clean:
 	rm -f $(OBJS)
 
 distclean:	clean
-	rm -f $(BINS) core *.bak .depend
+	rm -f $(BINS) $(obj)core $(obj)*.bak $(obj).depend
 
 #########################################################################
 
-.depend:	Makefile $(OBJS:.o=.c)
-		$(CC) -M $(CPPFLAGS) -I../include $(OBJS:.o=.c) > $@
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
 
--include .depend
+sinclude $(obj).depend
 
 #########################################################################
 
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