[Xen-devel] [RFC XEN PATCH 20/23] update arch/Makefile

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

archprepare target
make asm-offsets.h
make asm-macros.[ih]
---
 xen/Kbuild            | 10 ++++++++
 xen/arch/x86/Makefile | 54 +++++++++++++++++++++----------------------
 2 files changed, 37 insertions(+), 27 deletions(-)
 create mode 100644 xen/Kbuild

diff --git a/xen/Kbuild b/xen/Kbuild
new file mode 100644
index 000000000000..3b36d67226d6
--- /dev/null
+++ b/xen/Kbuild
@@ -0,0 +1,10 @@
+#####
+# Generate asm-offsets.h
+
+offsets-file := include/asm-$(SRCARCH)/asm-offsets.h
+
+always  += $(offsets-file)
+
+$(offsets-file): arch/$(SRCARCH)/asm-offsets.s FORCE
+       $(call filechk,offsets,__ASM_OFFSETS_H__)
+
diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index 41486c512f10..9a6a0a595975 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -64,11 +64,17 @@ LDFLAGS_emulation_OpenBSD := _obsd
 LDFLAGS_emulation_FreeBSD := _fbsd
 KBUILD_LDFLAGS += -melf_x86_64$(LDFLAGS_emulation_$(XEN_OS))
 
+archheaders: $(objtree)/include/asm-x86/asm-macros.h
+
+archprepare:
+       $(Q)$(MAKE) $(build)=arch/$(SRCARCH) arch/$(SRCARCH)/asm-offsets.s
+
 efi-y := $(shell if [ ! -r $(BASEDIR)/include/xen/compile.h -o \
                       -O $(BASEDIR)/include/xen/compile.h ]; then \
                          echo '$(TARGET).efi'; fi)
 
-ALL_OBJS := $(BASEDIR)/arch/x86/boot/built_in.o 
$(BASEDIR)/arch/x86/efi/built_in.o $(ALL_OBJS)
+head-y := arch/x86/boot/
+head-y += arch/x86/efi/
 
 ifeq ($(CONFIG_LTO),y)
 # Gather all LTO objects together
@@ -104,7 +110,10 @@ EFI_LDFLAGS += --major-os-version=2 --minor-os-version=0
 EFI_LDFLAGS += --major-subsystem-version=2 --minor-subsystem-version=0
 
 # Check if the compiler supports the MS ABI.
-export XEN_BUILD_EFI := $(shell $(CC) $(filter-out $(CFLAGS-y) .%.d,$(CFLAGS)) 
-c efi/check.c -o efi/check.o 2>/dev/null && echo y)
+#export XEN_BUILD_EFI := $(shell $(CC) $(filter-out $(CFLAGS-y) 
.%.d,$(CFLAGS)) -c efi/check.c -o efi/check.o 2>/dev/null && echo y)
+# XXX FIXME: The subdir efi/ depends on symbolic links of files in common/efi/
+# XXX Disable EFI build for now.
+override XEN_BUILD_EFI :=
 # Check if the linker supports PE.
 XEN_BUILD_PE := $(if $(XEN_BUILD_EFI),$(shell $(LD) -mi386pep --subsystem=10 
-o efi/check.efi efi/check.o 2>/dev/null && echo y))
 CFLAGS-$(XEN_BUILD_EFI) += -DXEN_BUILD_EFI
@@ -154,31 +163,22 @@ $(TARGET).efi: prelink-efi.o $(note_file) efi.lds 
efi/relocs-dummy.o efi/mkreloc
 efi/boot.init.o efi/runtime.o efi/compat.o efi/buildid.o: 
$(BASEDIR)/arch/x86/efi/built_in.o
 efi/boot.init.o efi/runtime.o efi/compat.o efi/buildid.o: ;
 
-$(BASEDIR)/include/asm-x86/asm-macros.h: asm-macros.i Makefile
-       echo '#if 0' >$@.new
-       echo '.if 0' >>$@.new
-       echo '#endif' >>$@.new
-       echo 'asm ( ".include \"$@\"" );' >>$@.new
-       echo '#if 0' >>$@.new
-       echo '.endif' >>$@.new
-       cat $< >>$@.new
-       echo '#endif' >>$@.new
-       $(call move-if-changed,$@.new,$@)
+define filechk_asm-macros.h
+       echo '#if 0'; \
+       echo '.if 0'; \
+       echo '#endif'; \
+       echo 'asm ( ".include \"$@\"" );'; \
+       echo '#if 0'; \
+       echo '.endif'; \
+       cat $<; \
+       echo '#endif'
+endef
+
+$(objtree)/arch/x86/asm-macros.i: FORCE
+       $(Q)$(MAKE) $(build)=$(@D) $@
+
+$(objtree)/include/asm-x86/asm-macros.h: $(objtree)/arch/x86/asm-macros.i 
Makefile FORCE
+       $(call filechk,asm-macros.h)
 
 efi/mkreloc: efi/mkreloc.c
        $(HOSTCC) $(HOSTCFLAGS) -g -o $@ $<
-
-.PHONY: clean
-clean::
-       rm -f asm-offsets.s *.lds boot/*.o boot/*~ boot/core boot/mkelf32
-       rm -f asm-macros.i $(BASEDIR)/include/asm-x86/asm-macros.*
-       rm -f $(BASEDIR)/.xen-syms.[0-9]* boot/.*.d $(BASEDIR)/.xen.elf32
-       rm -f $(BASEDIR)/.xen.efi.[0-9]* efi/*.efi efi/mkreloc
-       rm -f boot/cmdline.S boot/reloc.S boot/*.lnk boot/*.bin
-       rm -f note.o
-
-# Suppress loading of DEPS files for internal, temporary target files.  This
-# then also suppresses re-generation of the respective .*.d2 files.
-ifeq ($(filter-out .xen%.o,$(notdir $(MAKECMDGOALS))),)
-DEPS:=
-endif
-- 
Anthony PERARD

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