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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [XEN PATCH v7 26/51] build: build everything from the root dir, use obj=$subdir
A subdirectory is now built by setting "$(obj)" instead of changing
directory. "$(obj)" should always be set when using "Rules.mk" and
thus a shortcut "$(build)" is introduced and should be used.
A new variable "$(need-builtin)" is introduce. It is to be used
whenever a "built_in.o" is wanted from a subdirectory. "built_in.o"
isn't the main target anymore, and thus only needs to depends on the
objects that should be part of "built_in.o".
Introduce $(srctree) and $(objtree) to replace $(BASEDIR) in cases a
relative path is better.
DEPS is updated as the existing macro to deal with it doesn't know
about $(obj).
There's some changes in "Rules.mk" which in addition to deal with
"$(obj)" also make it's looks more like "Makefile.build" from Linux
v5.12.
test/Makefile doesn't need special handling in order to build
everything under test/, Rules.mk will visit test/livepatch via
$(subdir-y), thus "tests" "all" and "build" target are removed.
"subtree-force-update" target isn't useful so it is removed as well.
test/livepatch/Makefile doesn't need default target anymore, Rules.mk
will build everything in $(extra-y) and thus all *.livepatch.
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Acked-by: Bob Eshleman <bobbyeshleman@xxxxxxxxx>
---
Notes:
v7:
- Spell "Makefile.build" as "Rules.mk" in the warning in Rules.mk about
undefined $(obj).
- use $(srctree) for include/xen/config.h
- handle $(nocov-y) and $(noubsan-y), needed to add $(obj)/
xen/Makefile | 28 ++++----
xen/Rules.mk | 134 ++++++++++++++++++++++++------------
xen/arch/arm/Makefile | 4 +-
xen/arch/arm/arch.mk | 4 +-
xen/arch/riscv/arch.mk | 4 +-
xen/arch/x86/Makefile | 11 +--
xen/arch/x86/Rules.mk | 4 +-
xen/arch/x86/arch.mk | 12 ++--
xen/arch/x86/boot/Makefile | 8 +--
xen/build.mk | 16 +++--
xen/include/Makefile | 6 +-
xen/scripts/Kbuild.include | 6 ++
xen/test/Makefile | 7 +-
xen/test/livepatch/Makefile | 6 --
xen/xsm/flask/Makefile | 2 +-
xen/xsm/flask/ss/Makefile | 2 +-
16 files changed, 153 insertions(+), 101 deletions(-)
diff --git a/xen/Makefile b/xen/Makefile
index f07c9251c030..eb9ea70aaa29 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -20,6 +20,10 @@ export PYTHON ?= $(PYTHON_INTERPRETER)
export BASEDIR := $(CURDIR)
export XEN_ROOT := $(BASEDIR)/..
+srctree := .
+objtree := .
+export srctree objtree
+
# Do not use make's built-in rules and variables
MAKEFLAGS += -rR
@@ -45,7 +49,7 @@ export KCONFIG_CONFIG ?= .config
export CC CXX LD
-export TARGET := $(BASEDIR)/xen
+export TARGET := xen
.PHONY: default
default: build
@@ -236,7 +240,7 @@ endif
CFLAGS += -nostdinc -fno-builtin -fno-common
CFLAGS += -Werror -Wredundant-decls -Wno-pointer-arith
$(call cc-option-add,CFLAGS,CC,-Wvla)
-CFLAGS += -pipe -D__XEN__ -include $(BASEDIR)/include/xen/config.h
+CFLAGS += -pipe -D__XEN__ -include $(srctree)/include/xen/config.h
CFLAGS-$(CONFIG_DEBUG_INFO) += -g
ifneq ($(CONFIG_CC_IS_CLANG),y)
@@ -339,10 +343,10 @@ _install: $(TARGET)$(CONFIG_XEN_INSTALL_SUFFIX)
.PHONY: tests
tests:
- $(MAKE) -f $(BASEDIR)/Rules.mk -C test tests
+ $(MAKE) $(build)=test
.PHONY: install-tests
install-tests:
- $(MAKE) -f $(BASEDIR)/Rules.mk -C test install
+ $(MAKE) $(build)=test install
.PHONY: _uninstall
_uninstall: D=$(DESTDIR)
@@ -398,16 +402,16 @@ $(TARGET).gz: $(TARGET)
$(TARGET): FORCE
$(MAKE) -C tools
- $(MAKE) -f $(BASEDIR)/Rules.mk include/xen/compile.h
+ $(MAKE) $(build)=. include/xen/compile.h
[ -e arch/$(TARGET_ARCH)/efi ] && for f in $$(cd common/efi; echo
*.[ch]); \
do test -r arch/$(TARGET_ARCH)/efi/$$f || \
ln -nsf ../../../common/efi/$$f arch/$(TARGET_ARCH)/efi/; \
done; \
true
- $(MAKE) -f $(BASEDIR)/Rules.mk -C include
- $(MAKE) -f $(BASEDIR)/Rules.mk -C arch/$(TARGET_ARCH) include
- $(MAKE) -f $(BASEDIR)/Rules.mk
arch/$(TARGET_ARCH)/include/asm/asm-offsets.h
- $(MAKE) -f $(BASEDIR)/Rules.mk $@
+ $(MAKE) $(build)=include all
+ $(MAKE) $(build)=arch/$(TARGET_ARCH) include
+ $(MAKE) $(build)=. arch/$(TARGET_ARCH)/include/asm/asm-offsets.h
+ $(MAKE) $(build)=. $@
SUBDIRS = xsm arch/$(TARGET_ARCH) common drivers lib test
define all_sources
@@ -454,13 +458,13 @@ _MAP:
$(NM) -n $(TARGET)-syms | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw]
\)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' > System.map
%.o %.i %.s: %.c FORCE
- $(MAKE) -f $(BASEDIR)/Rules.mk -C $(*D) $(@F)
+ $(MAKE) $(build)=$(*D) $(*D)/$(@F)
%.o %.s: %.S FORCE
- $(MAKE) -f $(BASEDIR)/Rules.mk -C $(*D) $(@F)
+ $(MAKE) $(build)=$(*D) $(*D)/$(@F)
%/: FORCE
- $(MAKE) -f $(BASEDIR)/Rules.mk -C $* built_in.o built_in_bin.o
+ $(MAKE) $(build)=$* need-builtin=1
.PHONY: cloc
cloc:
diff --git a/xen/Rules.mk b/xen/Rules.mk
index 245efe705a1e..2e1435ff4ada 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -3,19 +3,29 @@
# Makefile and are consumed by Rules.mk
#
-obj := .
src := $(obj)
+PHONY := __build
+__build:
+
-include $(BASEDIR)/include/config/auto.conf
include $(XEN_ROOT)/Config.mk
include $(BASEDIR)/scripts/Kbuild.include
+ifndef obj
+$(warning kbuild: Rules.mk is included improperly)
+endif
+
# Initialise some variables
+obj-y :=
lib-y :=
targets :=
+subdir-y :=
CFLAGS-y :=
AFLAGS-y :=
+nocov-y :=
+noubsan-y :=
SPECIAL_DATA_SECTIONS := rodata $(foreach a,1 2 4 8 16, \
$(foreach w,1 2 4, \
@@ -51,27 +61,54 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $< $@
quiet_cmd_binfile = BINFILE $@
cmd_binfile = $(SHELL) $(BASEDIR)/tools/binfile $(BINFILE_FLAGS) $@ $(2)
-define gendep
- ifneq ($(1),$(subst /,:,$(1)))
- DEPS += $(dir $(1)).$(notdir $(1)).d
- endif
-endef
-$(foreach o,$(filter-out %/,$(obj-y) $(obj-bin-y) $(extra-y)),$(eval $(call
gendep,$(o))))
+# Figure out what we need to build from the various variables
+# ===========================================================================
+
+# Libraries are always collected in one lib file.
+# Filter out objects already built-in
+lib-y := $(filter-out $(obj-y), $(sort $(lib-y)))
+
+# Subdirectories we need to descend into
+subdir-y := $(subdir-y) $(patsubst %/,%,$(filter %/, $(obj-y)))
# Handle objects in subdirs
-# ---------------------------------------------------------------------------
-# o if we encounter foo/ in $(obj-y), replace it by foo/built_in.o
-# and add the directory to the list of dirs to descend into: $(subdir-y)
-subdir-y := $(subdir-y) $(filter %/, $(obj-y))
+# - if we encounter foo/ in $(obj-y), replace it by foo/built_in.o
+ifdef need-builtin
obj-y := $(patsubst %/, %/built_in.o, $(obj-y))
+else
+obj-y := $(filter-out %/, $(obj-y))
+endif
-# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
-# tell kbuild to descend
-subdir-obj-y := $(filter %/built_in.o, $(obj-y))
+# Add subdir path
-# Libraries are always collected in one lib file.
-# Filter out objects already built-in
-lib-y := $(filter-out $(obj-y), $(sort $(lib-y)))
+extra-y := $(addprefix $(obj)/,$(extra-y))
+targets := $(addprefix $(obj)/,$(targets))
+lib-y := $(addprefix $(obj)/,$(lib-y))
+obj-y := $(addprefix $(obj)/,$(obj-y))
+obj-bin-y := $(addprefix $(obj)/,$(obj-bin-y))
+subdir-y := $(addprefix $(obj)/,$(subdir-y))
+nocov-y := $(addprefix $(obj)/,$(nocov-y))
+noubsan-y := $(addprefix $(obj)/,$(noubsan-y))
+
+# subdir-builtin may contain duplications. Use $(sort ...)
+subdir-builtin := $(sort $(filter %/built_in.o, $(obj-y)))
+
+targets-for-builtin := $(extra-y)
+
+ifneq ($(strip $(lib-y)),)
+ targets-for-builtin += $(obj)/lib.a
+endif
+
+ifdef need-builtin
+ targets-for-builtin += $(obj)/built_in.o
+ ifneq ($(strip $(obj-bin-y)),)
+ ifeq ($(CONFIG_LTO),y)
+ targets-for-builtin += $(obj)/built_in_bin.o
+ endif
+ endif
+endif
+
+targets += $(targets-for-builtin)
$(filter %.init.o,$(obj-y) $(obj-bin-y) $(extra-y)): CFLAGS-y +=
-DINIT_SECTIONS_ONLY
@@ -123,29 +160,28 @@ quiet_cmd_cc_builtin = CC $@
cmd_cc_builtin = \
$(CC) $(XEN_CFLAGS) -c -x c /dev/null -o $@
+# To build objects in subdirs, we need to descend into the directories
+$(subdir-builtin): $(obj)/%/built_in.o: $(obj)/% ;
+
quiet_cmd_ld_builtin = LD $@
ifeq ($(CONFIG_LTO),y)
cmd_ld_builtin = \
- $(LD_LTO) -r -o $@ $(filter $(obj-y),$(real-prereqs))
+ $(LD_LTO) -r -o $@ $(real-prereqs)
else
cmd_ld_builtin = \
- $(LD) $(XEN_LDFLAGS) -r -o $@ $(filter $(obj-y),$(real-prereqs))
+ $(LD) $(XEN_LDFLAGS) -r -o $@ $(real-prereqs)
endif
-built_in.o: $(obj-y) $(if $(strip $(lib-y)),lib.a) $(extra-y) FORCE
+$(obj)/built_in.o: $(obj-y) FORCE
$(call if_changed,$(if $(strip $(obj-y)),ld_builtin,cc_builtin))
-lib.a: $(lib-y) FORCE
+$(obj)/lib.a: $(lib-y) FORCE
$(call if_changed,ar)
-targets += built_in.o
-ifneq ($(strip $(lib-y)),)
-targets += lib.a
-endif
-targets += $(filter-out $(subdir-obj-y), $(obj-y) $(lib-y)) $(extra-y)
-targets += $(MAKECMDGOALS)
+targets += $(filter-out $(subdir-builtin), $(obj-y))
+targets += $(lib-y) $(MAKECMDGOALS)
-built_in_bin.o: $(obj-bin-y) $(extra-y)
+$(obj)/built_in_bin.o: $(obj-bin-y)
ifeq ($(strip $(obj-bin-y)),)
$(CC) $(a_flags) -c -x assembler /dev/null -o $@
else
@@ -156,21 +192,13 @@ endif
PHONY += FORCE
FORCE:
-%/built_in.o %/lib.a: FORCE
- $(MAKE) -f $(BASEDIR)/Rules.mk -C $* built_in.o
-
-%/built_in_bin.o: FORCE
- $(MAKE) -f $(BASEDIR)/Rules.mk -C $* built_in_bin.o
-
-SRCPATH := $(patsubst $(BASEDIR)/%,%,$(CURDIR))
-
quiet_cmd_cc_o_c = CC $@
ifeq ($(CONFIG_ENFORCE_UNIQUE_SYMBOLS),y)
cmd_cc_o_c = $(CC) $(c_flags) -c $< -o $(dot-target).tmp -MQ $@
ifeq ($(CONFIG_CC_IS_CLANG),y)
- cmd_objcopy_fix_sym = $(OBJCOPY) --redefine-sym $<=$(SRCPATH)/$<
$(dot-target).tmp $@
+ cmd_objcopy_fix_sym = $(OBJCOPY) --redefine-sym $(<F)=$<
$(dot-target).tmp $@
else
- cmd_objcopy_fix_sym = $(OBJCOPY) --redefine-sym $(<F)=$(SRCPATH)/$<
$(dot-target).tmp $@
+ cmd_objcopy_fix_sym = $(OBJCOPY) --redefine-sym $(<F)=$<
$(dot-target).tmp $@
endif
cmd_objcopy_fix_sym += && rm -f $(dot-target).tmp
else
@@ -182,13 +210,13 @@ define rule_cc_o_c
$(call cmd,objcopy_fix_sym)
endef
-%.o: %.c FORCE
+$(obj)/%.o: $(src)/%.c FORCE
$(call if_changed_rule,cc_o_c)
quiet_cmd_cc_o_S = CC $@
cmd_cc_o_S = $(CC) $(a_flags) -c $< -o $@
-%.o: %.S FORCE
+$(obj)/%.o: $(src)/%.S FORCE
$(call if_changed,cc_o_S)
@@ -206,7 +234,7 @@ define cmd_obj_init_o
$(OBJCOPY) $(foreach s,$(SPECIAL_DATA_SECTIONS),--rename-section
.$(s)=.init.$(s)) $< $@
endef
-$(filter %.init.o,$(obj-y) $(obj-bin-y) $(extra-y)): %.init.o: %.o FORCE
+$(filter %.init.o,$(obj-y) $(obj-bin-y) $(extra-y)): $(obj)/%.init.o:
$(obj)/%.o FORCE
$(call if_changed,obj_init_o)
quiet_cmd_cpp_i_c = CPP $@
@@ -218,19 +246,21 @@ cmd_cc_s_c = $(CC) $(filter-out -Wa$(comma)%,$(c_flags))
-S $< -o $@
quiet_cmd_cpp_s_S = CPP $@
cmd_cpp_s_S = $(CPP) $(call cpp_flags,$(a_flags)) -MQ $@ -o $@ $<
-%.i: %.c FORCE
+$(obj)/%.i: $(src)/%.c FORCE
$(call if_changed,cpp_i_c)
-%.s: %.c FORCE
+$(obj)/%.s: $(src)/%.c FORCE
$(call if_changed,cc_s_c)
-%.s: %.S FORCE
+$(obj)/%.s: $(src)/%.S FORCE
$(call if_changed,cpp_s_S)
# Linker scripts, .lds.S -> .lds
quiet_cmd_cpp_lds_S = LDS $@
cmd_cpp_lds_S = $(CPP) -P $(call cpp_flags,$(a_flags)) -D__LINKER__ -MQ $@ -o
$@ $<
+targets := $(filter-out $(PHONY), $(targets))
+
# Add intermediate targets:
# When building objects with specific suffix patterns, add intermediate
# targets that the final targets are derived from.
@@ -240,7 +270,18 @@ intermediate_targets = $(foreach sfx, $(2), \
# %.init.o <- %.o
targets += $(call intermediate_targets, .init.o, .o)
--include $(DEPS_INCLUDE)
+# Build
+# ---------------------------------------------------------------------------
+
+__build: $(targets-for-builtin) $(subdir-y)
+ @:
+
+# Descending
+# ---------------------------------------------------------------------------
+
+PHONY += $(subdir-y)
+$(subdir-y):
+ $(Q)$(MAKE) $(build)=$@ need-builtin=$(if $(filter $@/built_in.o,
$(subdir-builtin)),1)
# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
@@ -251,6 +292,9 @@ existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
+DEPS:= $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).d)
+-include $(DEPS_INCLUDE)
+
# Declare the contents of the PHONY variable as phony. We keep that
# information in a variable so we can use it in if_changed and friends.
.PHONY: $(PHONY)
diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile
index 9f9c73aa6c5d..a3204d22d17b 100644
--- a/xen/arch/arm/Makefile
+++ b/xen/arch/arm/Makefile
@@ -93,12 +93,12 @@ $(TARGET)-syms: $(BASEDIR)/prelink.o $(obj)/xen.lds
$(BASEDIR)/common/symbols-dummy.o -o $(@D)/.$(@F).0
$(NM) -pa --format=sysv $(@D)/.$(@F).0 \
| $(BASEDIR)/tools/symbols $(all_symbols) --sysv --sort
>$(@D)/.$(@F).0.S
- $(MAKE) -f $(BASEDIR)/Rules.mk $(@D)/.$(@F).0.o
+ $(MAKE) $(build)=$(@D) $(@D)/.$(@F).0.o
$(LD) $(XEN_LDFLAGS) -T $(obj)/xen.lds -N $< \
$(@D)/.$(@F).0.o -o $(@D)/.$(@F).1
$(NM) -pa --format=sysv $(@D)/.$(@F).1 \
| $(BASEDIR)/tools/symbols $(all_symbols) --sysv --sort
>$(@D)/.$(@F).1.S
- $(MAKE) -f $(BASEDIR)/Rules.mk $(@D)/.$(@F).1.o
+ $(MAKE) $(build)=$(@D) $(@D)/.$(@F).1.o
$(LD) $(XEN_LDFLAGS) -T $(obj)/xen.lds -N $< $(build_id_linker) \
$(@D)/.$(@F).1.o -o $@
$(NM) -pa --format=sysv $(@D)/$(@F) \
diff --git a/xen/arch/arm/arch.mk b/xen/arch/arm/arch.mk
index ba3f140e2ea7..4e3f7014305e 100644
--- a/xen/arch/arm/arch.mk
+++ b/xen/arch/arm/arch.mk
@@ -1,8 +1,8 @@
########################################
# arm-specific definitions
-CFLAGS += -I$(BASEDIR)/include
-CFLAGS += -I$(BASEDIR)/arch/$(TARGET_ARCH)/include
+CFLAGS += -I$(srctree)/include
+CFLAGS += -I$(srctree)/arch/$(TARGET_ARCH)/include
$(call cc-options-add,CFLAGS,CC,$(EMBEDDED_EXTRA_CFLAGS))
$(call cc-option-add,CFLAGS,CC,-Wnested-externs)
diff --git a/xen/arch/riscv/arch.mk b/xen/arch/riscv/arch.mk
index 39ae6ffea94d..694ba053ceab 100644
--- a/xen/arch/riscv/arch.mk
+++ b/xen/arch/riscv/arch.mk
@@ -11,5 +11,5 @@ riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
# -mcmodel=medlow would force Xen into the lower half.
CFLAGS += -march=$(riscv-march-y) -mstrict-align -mcmodel=medany
-CFLAGS += -I$(BASEDIR)/include
-CFLAGS += -I$(BASEDIR)/arch/$(TARGET_ARCH)/include
+CFLAGS += -I$(srctree)/include
+CFLAGS += -I$(srctree)/arch/$(TARGET_ARCH)/include
diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index bb2da0d013fb..f60084eb73e7 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -81,6 +81,9 @@ endif
extra-y += asm-macros.i
extra-y += xen.lds
+# Allows usercopy.c to includes itself
+$(obj)/usercopy.o: CFLAGS-y += -I.
+
ifneq ($(CONFIG_HVM),y)
$(obj)/x86_emulate.o: CFLAGS-y += -Wno-unused-label
endif
@@ -132,13 +135,13 @@ $(TARGET)-syms: $(BASEDIR)/prelink.o $(obj)/xen.lds
$(NM) -pa --format=sysv $(@D)/.$(@F).0 \
| $(BASEDIR)/tools/symbols $(all_symbols) --sysv --sort \
>$(@D)/.$(@F).0.S
- $(MAKE) -f $(BASEDIR)/Rules.mk $(@D)/.$(@F).0.o
+ $(MAKE) $(build)=$(@D) $(@D)/.$(@F).0.o
$(LD) $(XEN_LDFLAGS) -T $(obj)/xen.lds -N $< $(build_id_linker) \
$(@D)/.$(@F).0.o -o $(@D)/.$(@F).1
$(NM) -pa --format=sysv $(@D)/.$(@F).1 \
| $(BASEDIR)/tools/symbols $(all_symbols) --sysv --sort
$(syms-warn-dup-y) \
>$(@D)/.$(@F).1.S
- $(MAKE) -f $(BASEDIR)/Rules.mk $(@D)/.$(@F).1.o
+ $(MAKE) $(build)=$(@D) $(@D)/.$(@F).1.o
$(LD) $(XEN_LDFLAGS) -T $(obj)/xen.lds -N $< $(build_id_linker) \
$(@D)/.$(@F).1.o -o $@
$(NM) -pa --format=sysv $(@D)/$(@F) \
@@ -202,14 +205,14 @@ endif
$(MKRELOC) $(foreach base,$(VIRT_BASE)
$(ALT_BASE),$(@D)/.$(@F).$(base).0) >$(@D)/.$(@F).0r.S
$(NM) -pa --format=sysv $(@D)/.$(@F).$(VIRT_BASE).0 \
| $(BASEDIR)/tools/symbols $(all_symbols) --sysv --sort
>$(@D)/.$(@F).0s.S
- $(MAKE) -f $(BASEDIR)/Rules.mk $(@D)/.$(@F).0r.o $(@D)/.$(@F).0s.o
+ $(MAKE) $(build)=$(@D) .$(@F).0r.o .$(@F).0s.o
$(foreach base, $(VIRT_BASE) $(ALT_BASE), \
$(LD) $(call EFI_LDFLAGS,$(base)) -T $(obj)/efi.lds -N $< \
$(@D)/.$(@F).0r.o $(@D)/.$(@F).0s.o $(note_file_option)
-o $(@D)/.$(@F).$(base).1 &&) :
$(MKRELOC) $(foreach base,$(VIRT_BASE)
$(ALT_BASE),$(@D)/.$(@F).$(base).1) >$(@D)/.$(@F).1r.S
$(NM) -pa --format=sysv $(@D)/.$(@F).$(VIRT_BASE).1 \
| $(BASEDIR)/tools/symbols $(all_symbols) --sysv --sort
>$(@D)/.$(@F).1s.S
- $(MAKE) -f $(BASEDIR)/Rules.mk $(@D)/.$(@F).1r.o $(@D)/.$(@F).1s.o
+ $(MAKE) $(build)=$(@D) .$(@F).1r.o .$(@F).1s.o
$(LD) $(call EFI_LDFLAGS,$(VIRT_BASE)) -T $(obj)/efi.lds -N $< \
$(@D)/.$(@F).1r.o $(@D)/.$(@F).1s.o $(note_file_option)
-o $@
$(NM) -pa --format=sysv $(@D)/$(@F) \
diff --git a/xen/arch/x86/Rules.mk b/xen/arch/x86/Rules.mk
index 56fe22c979ea..2d12c2dca208 100644
--- a/xen/arch/x86/Rules.mk
+++ b/xen/arch/x86/Rules.mk
@@ -2,9 +2,9 @@
# x86-specific definitions
ifneq ($(filter -DHAVE_AS_QUOTED_SYM,$(XEN_CFLAGS)),)
-object_label_flags = '-D__OBJECT_LABEL__=$(subst $(BASEDIR)/,,$(CURDIR))/$@'
+object_label_flags = '-D__OBJECT_LABEL__=$@'
else
-object_label_flags = '-D__OBJECT_LABEL__=$(subst /,$$,$(subst -,_,$(subst
$(BASEDIR)/,,$(CURDIR))/$@))'
+object_label_flags = '-D__OBJECT_LABEL__=$(subst /,$$,$(subst -,_,$@))'
endif
c_flags += $(object_label_flags) $(CFLAGS-stack-boundary)
a_flags += $(object_label_flags) $(CFLAGS-stack-boundary)
diff --git a/xen/arch/x86/arch.mk b/xen/arch/x86/arch.mk
index 61e0222f4a08..8bbf3e18e410 100644
--- a/xen/arch/x86/arch.mk
+++ b/xen/arch/x86/arch.mk
@@ -3,10 +3,10 @@
export XEN_IMG_OFFSET := 0x200000
-CFLAGS += -I$(BASEDIR)/include
-CFLAGS += -I$(BASEDIR)/arch/$(TARGET_ARCH)/include
-CFLAGS += -I$(BASEDIR)/arch/x86/include/asm/mach-generic
-CFLAGS += -I$(BASEDIR)/arch/x86/include/asm/mach-default
+CFLAGS += -I$(srctree)/include
+CFLAGS += -I$(srctree)/arch/$(TARGET_ARCH)/include
+CFLAGS += -I$(srctree)/arch/x86/include/asm/mach-generic
+CFLAGS += -I$(srctree)/arch/x86/include/asm/mach-default
CFLAGS += -DXEN_IMG_OFFSET=$(XEN_IMG_OFFSET)
# Prevent floating-point variables from creeping into Xen.
@@ -87,7 +87,7 @@ efi-check-relocs := $(shell $(OBJDUMP) -p
$(efi-check-o:.o=.efi) | grep '^[[:bla
ifeq ($(efi-check-relocs),2)
MKRELOC := :
else
-MKRELOC := efi/mkreloc
+MKRELOC := arch/x86/efi/mkreloc
# If the linker produced fixups but not precisely two of them, we need to
# disable it doing so. But if it didn't produce any fixups, it also wouldn't
# recognize the option.
@@ -103,6 +103,6 @@ export EFI_LDFLAGS
endif
# Set up the assembler include path properly for older toolchains.
-CFLAGS += -Wa,-I$(BASEDIR)/include
+CFLAGS += -Wa,-I$(srctree)/include
ALL_OBJS-y := arch/x86/boot/built_in.o arch/x86/efi/built_in.o $(ALL_OBJS-y)
diff --git a/xen/arch/x86/boot/Makefile b/xen/arch/x86/boot/Makefile
index 53d357489df2..2469ca7c4530 100644
--- a/xen/arch/x86/boot/Makefile
+++ b/xen/arch/x86/boot/Makefile
@@ -1,8 +1,8 @@
obj-bin-y += head.o
-DEFS_H_DEPS = $(src)/defs.h $(BASEDIR)/include/xen/stdbool.h
+DEFS_H_DEPS = $(BASEDIR)/$(src)/defs.h $(BASEDIR)/include/xen/stdbool.h
-CMDLINE_DEPS = $(DEFS_H_DEPS) $(src)/video.h
+CMDLINE_DEPS = $(DEFS_H_DEPS) $(BASEDIR)/$(src)/video.h
RELOC_DEPS = $(DEFS_H_DEPS) \
$(BASEDIR)/include/generated/autoconf.h \
@@ -14,7 +14,7 @@ RELOC_DEPS = $(DEFS_H_DEPS) \
$(obj)/head.o: $(obj)/cmdline.S $(obj)/reloc.S
$(obj)/cmdline.S: $(src)/cmdline.c $(CMDLINE_DEPS)
- $(MAKE) -f build32.mk -C $(obj) $(@F) CMDLINE_DEPS="$(CMDLINE_DEPS)"
+ $(MAKE) -f $(BASEDIR)/$(src)/build32.mk -C $(obj) $(@F)
CMDLINE_DEPS="$(CMDLINE_DEPS)"
$(obj)/reloc.S: $(src)/reloc.c $(RELOC_DEPS)
- $(MAKE) -f build32.mk -C $(obj) $(@F) RELOC_DEPS="$(RELOC_DEPS)"
+ $(MAKE) -f $(BASEDIR)/$(src)/build32.mk -C $(obj) $(@F)
RELOC_DEPS="$(RELOC_DEPS)"
diff --git a/xen/build.mk b/xen/build.mk
index 9093d9f493bc..c6c06d9f17f5 100644
--- a/xen/build.mk
+++ b/xen/build.mk
@@ -57,11 +57,15 @@ arch/$(TARGET_ARCH)/include/asm/asm-offsets.h: asm-offsets.s
echo ""; \
echo "#endif") <$< >$@
-# head.o is built by descending into arch/arm/$(TARGET_SUBARCH), depends on the
-# part of $(ALL_OBJS) that will eventually recurse into $(TARGET_SUBARCH)/ and
-# build head.o
-arch/arm/$(TARGET_SUBARCH)/head.o: arch/arm/built_in.o
-arch/arm/$(TARGET_SUBARCH)/head.o: ;
+build-dirs := $(patsubst %/built_in.o,%,$(filter %/built_in.o,$(ALL_OBJS)
$(ALL_LIBS)))
+
+# The actual objects are generated when descending,
+# make sure no implicit rule kicks in
+$(sort $(ALL_OBJS) $(ALL_LIBS)): $(build-dirs) ;
+
+PHONY += $(build-dirs)
+$(build-dirs): FORCE
+ $(Q)$(MAKE) $(build)=$@ need-builtin=1
ifeq ($(CONFIG_LTO),y)
# Gather all LTO objects together
@@ -79,4 +83,4 @@ endif
targets += prelink.o
$(TARGET): prelink.o FORCE
- $(MAKE) -f $(BASEDIR)/Rules.mk -C arch/$(TARGET_ARCH) $@
+ $(Q)$(MAKE) $(build)=arch/$(TARGET_ARCH) $@
diff --git a/xen/include/Makefile b/xen/include/Makefile
index 69224e22a950..341196306abd 100644
--- a/xen/include/Makefile
+++ b/xen/include/Makefile
@@ -58,7 +58,7 @@ $(obj)/compat/.xlat/%.h: $(obj)/compat/%.h
$(obj)/compat/.xlat/%.lst $(BASEDIR)/
export PYTHON=$(PYTHON); \
while read what name; do \
$(SHELL) $(BASEDIR)/tools/get-fields.sh "$$what" compat_$$name
$< || exit $$?; \
- done <$(patsubst compat/%,compat/.xlat/%,$(basename $<)).lst >$@.new
+ done <$(patsubst $(obj)/compat/%,$(obj)/compat/.xlat/%,$(basename
$<)).lst >$@.new
mv -f $@.new $@
.PRECIOUS: $(obj)/compat/.xlat/%.lst
@@ -83,8 +83,8 @@ PUBLIC_HEADERS := $(filter-out $(src)/public/arch-%
$(src)/public/dom0_ops.h, $(
PUBLIC_C99_HEADERS := $(src)/public/io/9pfs.h $(src)/public/io/pvcalls.h
PUBLIC_ANSI_HEADERS := $(filter-out $(src)/public/%ctl.h $(src)/public/xsm/%
$(src)/public/%hvm/save.h $(PUBLIC_C99_HEADERS), $(PUBLIC_HEADERS))
-public/io/9pfs.h-prereq := string
-public/io/pvcalls.h-prereq := string
+$(src)/public/io/9pfs.h-prereq := string
+$(src)/public/io/pvcalls.h-prereq := string
$(obj)/headers.chk: $(PUBLIC_ANSI_HEADERS) $(src)/Makefile
for i in $(filter %.h,$^); do \
diff --git a/xen/scripts/Kbuild.include b/xen/scripts/Kbuild.include
index 563b323f0501..62c7caeba1d1 100644
--- a/xen/scripts/Kbuild.include
+++ b/xen/scripts/Kbuild.include
@@ -59,6 +59,12 @@ ld-option = $(call success,$(LD) -v $(1))
# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ] && echo $(3) ||
echo $(4))
+###
+# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
+# Usage:
+# $(Q)$(MAKE) $(build)=dir
+build := -f $(BASEDIR)/Rules.mk obj
+
# Shorthand for $(MAKE) clean
# Usage:
# $(MAKE) $(clean) dir
diff --git a/xen/test/Makefile b/xen/test/Makefile
index 41e4d7bdb78b..080763c80766 100644
--- a/xen/test/Makefile
+++ b/xen/test/Makefile
@@ -1,13 +1,10 @@
-tests all: build
-
-
ifneq ($(XEN_TARGET_ARCH),x86_32)
# Xen 32-bit x86 hypervisor no longer supported, so has no test livepatches
subdir-y += livepatch
endif
-install build subtree-force-update uninstall: %:
+install uninstall: %:
set -e; for s in $(subdir-y); do \
- $(MAKE) -f $(BASEDIR)/Rules.mk -C $$s $*; \
+ $(MAKE) $(build)=$$s $*; \
done
diff --git a/xen/test/livepatch/Makefile b/xen/test/livepatch/Makefile
index e59245323e92..52ee58a08c5f 100644
--- a/xen/test/livepatch/Makefile
+++ b/xen/test/livepatch/Makefile
@@ -11,9 +11,6 @@ endif
CODE_ADDR=$(shell nm --defined $(1) | grep $(2) | awk '{print "0x"$$1}')
CODE_SZ=$(shell nm --defined -S $(1) | grep $(2) | awk '{ print "0x"$$2}')
-.PHONY: default
-build default: livepatch
-
extra-y += xen_hello_world.livepatch
xen_hello_world-objs := xen_hello_world_func.o xen_hello_world.o note.o
xen_note.o modinfo.o
$(obj)/xen_hello_world.o: $(obj)/config.h
@@ -156,9 +153,6 @@ LIVEPATCHES := $(filter %.livepatch,$(extra-y))
LIVEPATCH_DEBUG_DIR ?= $(DEBUG_DIR)/xen-livepatch
-.PHONY: livepatch
-livepatch: $(LIVEPATCHES)
-
install: $(addprefix $(obj)/,$(LIVEPATCHES))
$(INSTALL_DIR) $(DESTDIR)$(LIVEPATCH_DEBUG_DIR)
$(INSTALL_DATA) $(addprefix $(obj)/,$(LIVEPATCHES))
$(DESTDIR)$(LIVEPATCH_DEBUG_DIR)
diff --git a/xen/xsm/flask/Makefile b/xen/xsm/flask/Makefile
index ab26b8682e46..57190ff6c8ad 100644
--- a/xen/xsm/flask/Makefile
+++ b/xen/xsm/flask/Makefile
@@ -40,7 +40,7 @@ $(obj)/flask-policy.S: $(BASEDIR)/tools/binfile FORCE
$(call if_changed,binfile,$(obj)/policy.bin xsm_flask_init_policy)
targets += flask-policy.S
-FLASK_BUILD_DIR := $(CURDIR)
+FLASK_BUILD_DIR := $(BASEDIR)/$(obj)
POLICY_SRC := $(FLASK_BUILD_DIR)/xenpolicy-$(XEN_FULLVERSION)
$(obj)/policy.bin: FORCE
diff --git a/xen/xsm/flask/ss/Makefile b/xen/xsm/flask/ss/Makefile
index d32b9e07138e..aba1339f3808 100644
--- a/xen/xsm/flask/ss/Makefile
+++ b/xen/xsm/flask/ss/Makefile
@@ -8,4 +8,4 @@ obj-y += services.o
obj-y += conditional.o
obj-y += mls.o
-CFLAGS-y += -I../include
+CFLAGS-y += -I$(srctree)/xsm/flask/include
--
Anthony PERARD
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