#
# Makefile for s390 kernel patch package
#
# (C) 2001, 2002 by Jochen Rhrig (jr@debian.org)
#

KERNEL_VERSION_TEMP := $(shell sed -n 's/.*kernel-tree-\([^,]*\)\(-[[:digit:]]*\).*/\1 \2/p; t e; b; :e q' debian/control )
KERNEL_VERSION = $(word 1,$(KERNEL_VERSION_TEMP))
KERNEL_TREE_VERSION := $(KERNEL_VERSION)$(word 2,$(KERNEL_VERSION_TEMP))

export CP    = /bin/cp
export DIFF  = /usr/bin/diff -uN 
export GUNZIP= /bin/gunzip
export MKDIR = /bin/mkdir
export MV    = /bin/mv
export PATCH = /usr/bin/patch --no-backup-if-mismatch
export TAR   = /bin/tar
export TOUCH = /usr/bin/touch

patches = \
	linux-$(KERNEL_VERSION)-s390 \
	linux-$(KERNEL_VERSION)-s390-xip2fs-debian

kernel_source = kernel-source-$(KERNEL_VERSION)
kernel_source_tar = /usr/src/$(kernel_source).tar.bz2

kernel_patch = linux-$(KERNEL_VERSION)-s390.debian.diff

build: diff-stamp

source: source-stamp
source-stamp:
	@echo "Extracting kernel source ..."
	$(TAR) -xjf $(kernel_source_tar)
	cd $(kernel_source); /usr/src/kernel-patches/all/$(KERNEL_VERSION)/apply/debian $(KERNEL_TREE_VERSION)
	touch $@

source-orig: source-orig-stamp
source-orig-stamp: source-stamp
	@echo "Copying kernel source ..."
	$(CP) -al $(kernel_source) $(kernel_source).orig
	touch $@

patch: patch-stamp
patch-stamp: source-stamp source-orig-stamp
	@echo "Patching kernel ..."
	@cd $(kernel_source);				\
	for patch in $(patches); do			\
	  echo "Applying patch $$patch ...";		\
	  $(PATCH) -p0 < ../$$patch.diff || exit 1;	\
	done
	touch $@

diff: diff-stamp
diff-stamp: patch-stamp
	@echo "Generating new patch ..."
	-$(DIFF) -r $(kernel_source).orig $(kernel_source) > $(kernel_patch)
	touch $@

clean:
	$(RM) *-stamp
	$(RM) -r $(kernel_source).orig $(kernel_source) $(kernel_patch)
