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.
diff --git a/lib_i386/Makefile b/lib_i386/Makefile
index e5925e5..8dc809e 100644
--- a/lib_i386/Makefile
+++ b/lib_i386/Makefile
@@ -1,5 +1,5 @@
#
-# (C) Copyright 2002
+# (C) Copyright 2002-2006
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# See file CREDITS for list of people who contributed to this
@@ -23,23 +23,24 @@
include $(TOPDIR)/config.mk
-LIB = lib$(ARCH).a
+LIB = $(obj)lib$(ARCH).a
-AOBJS = bios.o bios_pci.o realmode_switch.o
+SOBJS = bios.o bios_pci.o realmode_switch.o
COBJS = board.o bios_setup.o i386_linux.o zimage.o realmode.o \
pci_type1.o pci.o video_bios.o video.o
-OBJS = $(AOBJS) $(COBJS)
+SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
-$(LIB): .depend $(OBJS)
+$(LIB): $(obj).depend $(OBJS)
$(AR) crv $@ $(OBJS)
#########################################################################
-.depend: Makefile $(AOBJS:.o=.S) $(COBJS:.o=.c)
- $(CC) -M $(CFLAGS) $(AOBJS:.o=.S) $(COBJS:.o=.c) > $@
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
-sinclude .depend
+sinclude $(obj).depend
#########################################################################