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/examples/Makefile b/examples/Makefile
index a342d75..85118ea 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -1,5 +1,5 @@
#
-# (C) Copyright 2000-2004
+# (C) Copyright 2000-2006
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# See file CREDITS for list of people who contributed to this
@@ -104,9 +104,9 @@
EX_LDFLAGS += -EB
endif
-OBJS = $(SREC:.srec=.o)
+COBJS := $(SREC:.srec=.o)
-LIB = libstubs.a
+LIB = $(obj)libstubs.a
LIBAOBJS=
ifeq ($(ARCH),ppc)
LIBAOBJS+= $(ARCH)_longjmp.o $(ARCH)_setjmp.o
@@ -115,34 +115,40 @@
LIBAOBJS+= test_burst_lib.o
endif
LIBCOBJS= stubs.o
-LIBOBJS = $(LIBAOBJS) $(LIBCOBJS)
+
+LIBOBJS = $(addprefix $(obj),$(LIBAOBJS) $(LIBCOBJS))
+
+SRCS := $(COBJS:.o=.c) $(LIBCOBJS:.o=.c) $(if $(LIBAOBJS),$(LIBAOBJS:.o=.S))
+OBJS := $(addprefix $(obj),$(COBJS))
+BIN := $(addprefix $(obj),$(BIN))
+SREC := $(addprefix $(obj),$(SREC))
gcclibdir := $(shell dirname `$(CC) -print-libgcc-file-name`)
clibdir := $(shell dirname `$(CC) $(CFLAGS) -print-file-name=libc.a`)
CPPFLAGS += -I..
-all: .depend $(OBJS) $(LIB) $(SREC) $(BIN)
+all: $(obj).depend $(OBJS) $(LIB) $(SREC) $(BIN)
#########################################################################
-$(LIB): .depend $(LIBOBJS)
- $(AR) crv $@ $(LIBOBJS)
+$(LIB): $(obj).depend $(LIBOBJS)
+ $(AR) crv $@ $(LIBOBJS)
-%: %.o $(LIB)
- $(LD) -g $(EX_LDFLAGS) -Ttext $(LOAD_ADDR) \
- -o $@ -e $(<:.o=) $< $(LIB) \
- -L$(gcclibdir) -lgcc
-%.srec: %
- $(OBJCOPY) -O srec $< $@ 2>/dev/null
+$(obj)%: $(obj)%.o $(LIB)
+ $(LD) -g $(EX_LDFLAGS) -Ttext $(LOAD_ADDR) \
+ -o $@ -e $(notdir $(<:.o=)) $< $(LIB) \
+ -L$(gcclibdir) -lgcc
+$(obj)%.srec: $(obj)%
+ $(OBJCOPY) -O srec $< $@ 2>/dev/null
-%.bin: %
- $(OBJCOPY) -O binary $< $@ 2>/dev/null
+$(obj)%.bin: $(obj)%
+ $(OBJCOPY) -O binary $< $@ 2>/dev/null
#########################################################################
-.depend: Makefile $(OBJS:.o=.c) $(LIBCOBJS:.o=.c) $(LIBAOBJS:.o=.S)
- $(CC) -M $(CFLAGS) $(OBJS:.o=.c) $(LIBCOBJS:.o=.c) $(LIBAOBJS:.o=.S) > $@
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
-sinclude .depend
+sinclude $(obj).depend
#########################################################################