# This is the correct place to edit the build version.
# All other places this is stored (eg. compile.h) should be autogenerated.
export XEN_VERSION       = 4
export XEN_SUBVERSION    = 2
export XEN_EXTRAVERSION ?= -unstable$(XEN_VENDORVERSION)
export XEN_FULLVERSION   = $(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION)
-include xen-version

export XEN_WHOAMI   ?= $(USER)
export XEN_DOMAIN   ?= $(shell ([ -x /bin/dnsdomainname ] && /bin/dnsdomainname) || ([ -x /bin/domainname ] && /bin/domainname || echo [unknown]))

export BASEDIR := $(CURDIR)
export XEN_ROOT := $(BASEDIR)/..

EFI_MOUNTPOINT ?= /boot/efi

.PHONY: default
default: build

.PHONY: dist
dist: install

.PHONY: build install clean distclean cscope TAGS tags MAP
build install debug clean distclean cscope TAGS tags MAP::
    $(MAKE) -f Rules.mk _$@

.PHONY: _build
_build: $(TARGET).gz

.PHONY: _install
_install: $(TARGET).gz
    [ -d $(DESTDIR)/boot ] || $(INSTALL_DIR) $(DESTDIR)/boot
    $(INSTALL_DATA) $(TARGET).gz $(DESTDIR)/boot/$(notdir $(TARGET))-$(XEN_FULLVERSION).gz
    ln -f -s $(notdir $(TARGET))-$(XEN_FULLVERSION).gz $(DESTDIR)/boot/$(notdir $(TARGET))-$(XEN_VERSION).$(XEN_SUBVERSION).gz
    ln -f -s $(notdir $(TARGET))-$(XEN_FULLVERSION).gz $(DESTDIR)/boot/$(notdir $(TARGET))-$(XEN_VERSION).gz
    ln -f -s $(notdir $(TARGET))-$(XEN_FULLVERSION).gz $(DESTDIR)/boot/$(notdir $(TARGET)).gz
    $(INSTALL_DATA) $(TARGET)-syms $(DESTDIR)/boot/$(notdir $(TARGET))-syms-$(XEN_FULLVERSION)
    if [ -r $(TARGET).efi ]; then \
        [ -d $(DESTDIR)$(LIBDIR)/efi ] || $(INSTALL_DIR) $(DESTDIR)$(LIBDIR)/efi; \
        $(INSTALL_DATA) $(TARGET).efi $(DESTDIR)$(LIBDIR)/efi/$(notdir $(TARGET))-$(XEN_FULLVERSION).efi; \
        ln -sf $(notdir $(TARGET))-$(XEN_FULLVERSION).efi $(DESTDIR)$(LIBDIR)/efi/$(notdir $(TARGET))-$(XEN_VERSION).$(XEN_SUBVERSION).efi; \
        ln -sf $(notdir $(TARGET))-$(XEN_FULLVERSION).efi $(DESTDIR)$(LIBDIR)/efi/$(notdir $(TARGET))-$(XEN_VERSION).efi; \
        ln -sf $(notdir $(TARGET))-$(XEN_FULLVERSION).efi $(DESTDIR)$(LIBDIR)/efi/$(notdir $(TARGET)).efi; \
        if [ -n '$(EFI_MOUNTPOINT)' -a -n '$(EFI_VENDOR)' ]; then \
            $(INSTALL_DATA) $(TARGET).efi $(DESTDIR)$(EFI_MOUNTPOINT)/efi/$(EFI_VENDOR)/$(notdir $(TARGET))-$(XEN_FULLVERSION).efi; \
        elif [ "$(DESTDIR)" = "$(patsubst $(shell cd $(XEN_ROOT) && pwd)/%,%,$(DESTDIR))" ]; then \
            echo 'EFI installation only partially done (EFI_VENDOR not set)' >&2; \
        fi; \
    fi

.PHONY: _debug
_debug:
    objdump -D -S $(TARGET)-syms > $(TARGET).s

.PHONY: _clean
_clean: delete-unfresh-files
    $(MAKE) -C tools clean
    $(MAKE) -f $(BASEDIR)/Rules.mk -C include clean
    $(MAKE) -f $(BASEDIR)/Rules.mk -C common clean
    $(MAKE) -f $(BASEDIR)/Rules.mk -C drivers clean
    $(MAKE) -f $(BASEDIR)/Rules.mk -C xsm clean
    $(MAKE) -f $(BASEDIR)/Rules.mk -C crypto clean
    $(MAKE) -f $(BASEDIR)/Rules.mk -C arch/$(TARGET_ARCH) clean
    rm -f include/asm *.o $(TARGET)* *~ core
    rm -f include/asm-*/asm-offsets.h
    [ -d tools/figlet ] && rm -f .banner*

.PHONY: _distclean
_distclean: clean
    rm -f tags TAGS cscope.files cscope.in.out cscope.out cscope.po.out

$(TARGET).gz: $(TARGET)
    gzip -f -9 < $< > $@.new
    mv $@.new $@

$(TARGET): delete-unfresh-files
    $(MAKE) -C tools
    $(MAKE) -f $(BASEDIR)/Rules.mk include/xen/compile.h
    [ -e include/asm ] || ln -sf asm-$(TARGET_ARCH) include/asm
    $(MAKE) -f $(BASEDIR)/Rules.mk -C include
    $(MAKE) -f $(BASEDIR)/Rules.mk -C arch/$(TARGET_ARCH) asm-offsets.s
    $(MAKE) -f $(BASEDIR)/Rules.mk include/asm-$(TARGET_ARCH)/asm-offsets.h
    $(MAKE) -f $(BASEDIR)/Rules.mk -C arch/$(TARGET_ARCH) $(TARGET)

# drivers/char/console.o contains static banner/compile info. Blow it away.
# Don't refresh these files during e.g., 'sudo make install'
.PHONY: delete-unfresh-files
delete-unfresh-files:
    @if [ ! -r include/xen/compile.h -o -O include/xen/compile.h ]; then \
        rm -f include/xen/compile.h; \
    fi

.banner: Makefile
    $(MAKE) -C tools
    @tools/figlet/figlet -d tools/figlet Xen $(XEN_FULLVERSION) 2>$@2 >$@1
    @cat $@1 $@2 >$@
    @rm -f $@1 $@2

# compile.h contains dynamic build info. Rebuilt on every 'make' invocation.
include/xen/compile.h: include/xen/compile.h.in .banner
    @sed -e 's/@@date@@/$(shell LC_ALL=C date)/g' \
        -e 's/@@time@@/$(shell LC_ALL=C date +%T)/g' \
        -e 's/@@whoami@@/$(XEN_WHOAMI)/g' \
        -e 's/@@domain@@/$(XEN_DOMAIN)/g' \
        -e 's/@@hostname@@/$(shell hostname)/g' \
        -e 's!@@compiler@@!$(shell $(CC) $(CFLAGS) -v 2>&1 | grep version | tail -1)!g' \
        -e 's/@@version@@/$(XEN_VERSION)/g' \
        -e 's/@@subversion@@/$(XEN_SUBVERSION)/g' \
        -e 's/@@extraversion@@/$(XEN_EXTRAVERSION)/g' \
        -e 's!@@changeset@@!$(shell ((hg parents --template "{date|date} {rev}:{node|short}" >/dev/null && hg parents --template "{date|date} {rev}:{node|short}") || echo "unavailable") 2>/dev/null)!g' \
        < include/xen/compile.h.in > $@.new
    @grep \" .banner >> $@.new
    @grep -v \" .banner
    @mv -f $@.new $@

include/asm-$(TARGET_ARCH)/asm-offsets.h: arch/$(TARGET_ARCH)/asm-offsets.s
    @(set -e; \
      echo "/*"; \
      echo " * DO NOT MODIFY."; \
      echo " *"; \
      echo " * This file was auto-generated from $<"; \
      echo " *"; \
      echo " */"; \
      echo ""; \
      echo "#ifndef __ASM_OFFSETS_H__"; \
      echo "#define __ASM_OFFSETS_H__"; \
      echo ""; \
      sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
      echo ""; \
      echo "#endif") <$< >$@

SUBDIRS = xsm arch/$(TARGET_ARCH) common drivers
define all_sources
    ( find include/asm-$(TARGET_ARCH) -name '*.h' -print; \
      find include -name 'asm-*' -prune -o -name '*.h' -print; \
      find $(SUBDIRS) -name '*.[chS]' -print )
endef

define set_exuberant_flags
    exuberant_flags=`$1 --version 2>/dev/null | (grep -iq exuberant && \
    echo "-I __initdata,__exitdata,__acquires,__releases \
        -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
        --extra=+f --c-kinds=+px") || true`
endef

.PHONY: xenversion
xenversion:
    @echo $(XEN_FULLVERSION)

.PHONY: _TAGS
_TAGS:
    set -e; rm -f TAGS; \
    $(call set_exuberant_flags,etags); \
    $(all_sources) | xargs etags $$exuberant_flags -a

.PHONY: _tags
_tags:
    set -e; rm -f tags; \
    $(call set_exuberant_flags,ctags); \
    $(all_sources) | xargs ctags $$exuberant_flags -a

.PHONY: _cscope
_cscope:
    $(all_sources) > cscope.files
    cscope -k -b -q

.PHONY: _MAP
_MAP:
    $(NM) -n $(TARGET)-syms | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' > System.map

.PHONY: FORCE
FORCE:

%.o %.i: %.c FORCE
    $(MAKE) -f $(BASEDIR)/Rules.mk -C $(*D) $(@F)

%.o %.s: %.S FORCE
    $(MAKE) -f $(BASEDIR)/Rules.mk -C $(*D) $(@F)

%/: FORCE
    $(MAKE) -f $(BASEDIR)/Rules.mk -C $* built_in.o built_in_bin.o