[PATCH] allow make ARCH="the machine hardware name"

[Adam Lee <adam8157@gmail.com>]

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This patch add support for make ARCH="the machine hardware name"(`uname
-m).

UTS_MACHINE is not always the same as SRCARCH, for example, s390x, we
should set UTS_MACHINE=s390x, and SRCARCH=s390. This patch makes that
right when "make ARCH=s390x".

And it avoid some error during invocation of make when ARCH set as
s390x, ppc64 or some machine hardware name else.

Signed-off-by: Adam Lee <adam8157@gmail.com>

[-- Attachment #2: allow-make-ARCH-the-machine-hardware-name.patch --]
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---
 Makefile |   41 ++++++++---------------------------------
 1 files changed, 8 insertions(+), 33 deletions(-)

diff --git a/Makefile b/Makefile
index 522fa47..bcbfaba 100644
--- a/Makefile
+++ b/Makefile
@@ -197,44 +197,19 @@ CROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
 
 # Architecture as present in compile.h
 UTS_MACHINE 	:= $(ARCH)
-SRCARCH 	:= $(ARCH)
 
-# Additional ARCH settings for x86
-ifeq ($(ARCH),i386)
-        SRCARCH := x86
-endif
-ifeq ($(ARCH),x86_64)
-        SRCARCH := x86
-endif
-
-# Additional ARCH settings for sparc
-ifeq ($(ARCH),sparc32)
-       SRCARCH := sparc
-endif
-ifeq ($(ARCH),sparc64)
-       SRCARCH := sparc
-endif
-
-# Additional ARCH settings for sh
-ifeq ($(ARCH),sh64)
-       SRCARCH := sh
-endif
-
-# Additional ARCH settings for tile
-ifeq ($(ARCH),tilepro)
-       SRCARCH := tile
-endif
-ifeq ($(ARCH),tilegx)
-       SRCARCH := tile
-endif
+# Where arch specific source located
+SRCARCH		:= $(shell echo $(ARCH) | \
+			   sed -e s/i.86/x86/ -e s/x86_64/x86/ \
+			   -e s/arm.*/arm/ -e s/sa110/arm/ \
+			   -e s/m68k.*/m68k/ -e s/mips.*/mips/ \
+			   -e s/parisc64/parisc/ -e s/ppc.*/powerpc/ \
+			   -e s/s390x/s390/ -e s/sh.*/sh/ -e s/sun4u/sparc/ \
+			   -e s/sparc.*/sparc/ -e s/tile.*/tile/ )
 
 # Where to locate arch specific headers
 hdr-arch  := $(SRCARCH)
 
-ifeq ($(ARCH),m68knommu)
-       hdr-arch  := m68k
-endif
-
 KCONFIG_CONFIG	?= .config
 export KCONFIG_CONFIG