mirror of
https://github.com/xen-project/xen.git
synced 2026-10-29 18:50:05 +01:00
Roger Pau Monné
7fb252bd41
The current test performed in order to check if the assembler supports certain instructions doesn't take into account the value of AFLAGS, which when using clang contains the option that disables the integrated assembler due to the lack of features. As a result of this, the current instruction tests were performed against the integrated assembler, but then at build time the non-integrated assembler was used. If both have feature-parity, this is a non-issue, but we cannot assume this. Fix this by passing AFLAGS in the instruction test, and including the arch Rules.mk makefile after AFLAGS is set. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reviewed-by: Wei Liu <wei.liu2@citrix.com> Reviewed-by: Jan Beulich <jbeulich@suse.com>
287 lines
9.6 KiB
Makefile
287 lines
9.6 KiB
Makefile
# -*- mode: Makefile; -*-
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ifeq ($(filter /%,$(XEN_ROOT)),)
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$(error XEN_ROOT must be absolute)
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endif
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# Convenient variables
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comma := ,
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squote := '
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empty :=
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space := $(empty) $(empty)
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# fallback for older make
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realpath = $(wildcard $(foreach file,$(1),$(shell cd -P $(dir $(file)) && echo "$$PWD/$(notdir $(file))")))
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or = $(if $(strip $(1)),$(1),$(if $(strip $(2)),$(2),$(if $(strip $(3)),$(3),$(if $(strip $(4)),$(4)))))
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-include $(XEN_ROOT)/.config
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# A debug build of Xen and tools?
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debug ?= y
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debug_symbols ?= $(debug)
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# Test coverage support
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coverage ?= n
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XEN_COMPILE_ARCH ?= $(shell uname -m | sed -e s/i.86/x86_32/ \
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-e s/i86pc/x86_32/ -e s/amd64/x86_64/ \
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-e s/armv7.*/arm32/ -e s/armv8.*/arm64/ \
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-e s/aarch64/arm64/)
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XEN_TARGET_ARCH ?= $(XEN_COMPILE_ARCH)
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XEN_OS ?= $(shell uname -s)
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CONFIG_$(XEN_OS) := y
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SHELL ?= /bin/sh
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# Tools to run on system hosting the build
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HOSTCFLAGS = -Wall -Werror -Wstrict-prototypes -O2 -fomit-frame-pointer
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HOSTCFLAGS += -fno-strict-aliasing
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DISTDIR ?= $(XEN_ROOT)/dist
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DESTDIR ?= /
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# Allow phony attribute to be listed as dependency rather than fake target
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.PHONY: .phony
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# Use Clang/LLVM instead of GCC?
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clang ?= n
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ifeq ($(clang),n)
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gcc := y
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HOSTCC ?= gcc
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HOSTCXX ?= g++
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else
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gcc := n
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HOSTCC ?= clang
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HOSTCXX ?= clang++
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endif
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include $(XEN_ROOT)/config/$(XEN_OS).mk
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include $(XEN_ROOT)/config/$(XEN_TARGET_ARCH).mk
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# arguments: variable, common path part, path to test, if yes, if no
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define setvar_dir
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ifndef $(1)
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ifneq (,$(wildcard $(2)$(3)))
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$(1) ?= $(2)$(4)
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else
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$(1) ?= $(2)$(5)
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endif
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endif
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endef
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ifneq ($(EXTRA_PREFIX),)
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EXTRA_INCLUDES += $(EXTRA_PREFIX)/include
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EXTRA_LIB += $(EXTRA_PREFIX)/lib
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endif
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PYTHON ?= python
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PYTHON_PREFIX_ARG ?= --prefix="$(prefix)"
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# The above requires that prefix contains *no spaces*. This variable is here
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# to permit the user to set PYTHON_PREFIX_ARG to '' to workaround this bug:
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# https://bugs.launchpad.net/ubuntu/+bug/362570
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# cc-option: Check if compiler supports first option, else fall back to second.
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#
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# This is complicated by the fact that unrecognised -Wno-* options:
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# (a) are ignored unless the compilation emits a warning; and
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# (b) even then produce a warning rather than an error
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# To handle this we do a test compile, passing the option-under-test, on a code
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# fragment that will always produce a warning (integer assigned to pointer).
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# We then grep for the option-under-test in the compiler's output, the presence
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# of which would indicate an "unrecognized command-line option" warning/error.
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#
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# Usage: cflags-y += $(call cc-option,$(CC),-march=winchip-c6,-march=i586)
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cc-option = $(shell if test -z "`echo 'void*p=1;' | \
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$(1) $(2) -S -o /dev/null -x c - 2>&1 | grep -- $(2) -`"; \
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then echo "$(2)"; else echo "$(3)"; fi ;)
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# cc-option-add: Add an option to compilation flags, but only if supported.
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# Usage: $(call cc-option-add CFLAGS,CC,-march=winchip-c6)
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cc-option-add = $(eval $(call cc-option-add-closure,$(1),$(2),$(3)))
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define cc-option-add-closure
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ifneq ($$(call cc-option,$$($(2)),$(3),n),n)
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$(1) += $(3)
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endif
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endef
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cc-options-add = $(foreach o,$(3),$(call cc-option-add,$(1),$(2),$(o)))
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# cc-ver: Check compiler is at least specified version. Return boolean 'y'/'n'.
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# Usage: ifeq ($(call cc-ver,$(CC),0x030400),y)
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cc-ver = $(shell if [ $$((`$(1) -dumpversion | awk -F. \
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'{ printf "0x%02x%02x%02x", $$1, $$2, $$3}'`)) -ge $$(($(2))) ]; \
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then echo y; else echo n; fi ;)
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# cc-ver-check: Check compiler is at least specified version, else fail.
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# Usage: $(call cc-ver-check,CC,0x030400,"Require at least gcc-3.4")
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cc-ver-check = $(eval $(call cc-ver-check-closure,$(1),$(2),$(3)))
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define cc-ver-check-closure
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ifeq ($$(call cc-ver,$$($(1)),$(2)),n)
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override $(1) = echo "*** FATAL BUILD ERROR: "$(3) >&2; exit 1;
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cc-option := n
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endif
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endef
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# Require GCC v4.1+
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check-$(gcc) = $(call cc-ver-check,CC,0x040100,"Xen requires at least gcc-4.1")
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$(eval $(check-y))
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# as-insn: Check whether assembler supports an instruction.
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# Usage: cflags-y += $(call as-insn "insn",option-yes,option-no)
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as-insn = $(if $(shell echo 'void _(void) { asm volatile ( $(2) ); }' \
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| $(1) $(AFLAGS) -c -x c -o /dev/null - 2>&1),$(4),$(3))
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# as-insn-check: Add an option to compilation flags, but only if insn is
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# supported by assembler.
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# Usage: $(call as-insn-check CFLAGS,CC,"nop",-DHAVE_GAS_NOP)
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as-insn-check = $(eval $(call as-insn-check-closure,$(1),$(2),$(3),$(4)))
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define as-insn-check-closure
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ifeq ($$(call as-insn,$$($(2)),$(3),y,n),y)
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$(1) += $(4)
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endif
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endef
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define buildmakevars2shellvars
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export PREFIX="$(prefix)"; \
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export XEN_SCRIPT_DIR="$(XEN_SCRIPT_DIR)"; \
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export XEN_ROOT="$(XEN_ROOT)"
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endef
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#
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# Compare $(1) and $(2) and replace $(2) with $(1) if they differ
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#
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# Typically $(1) is a newly generated file and $(2) is the target file
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# being regenerated. This prevents changing the timestamp of $(2) only
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# due to being auto regenereated with the same contents.
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define move-if-changed
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if ! cmp -s $(1) $(2); then mv -f $(1) $(2); else rm -f $(1); fi
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endef
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BUILD_MAKE_VARS := sbindir bindir LIBEXEC LIBEXEC_BIN libdir SHAREDIR \
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XENFIRMWAREDIR XEN_CONFIG_DIR XEN_SCRIPT_DIR XEN_LOCK_DIR \
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XEN_RUN_DIR XEN_PAGING_DIR XEN_DUMP_DIR
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buildmakevars2file = $(eval $(call buildmakevars2file-closure,$(1)))
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define buildmakevars2file-closure
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$(1): .phony
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rm -f $(1).tmp; \
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$(foreach var, $(BUILD_MAKE_VARS), \
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echo "$(var)=\"$($(var))\"" >>$(1).tmp;) \
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$(call move-if-changed,$(1).tmp,$(1))
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endef
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buildmakevars2header = $(eval $(call buildmakevars2header-closure,$(1)))
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define buildmakevars2header-closure
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$(1): .phony
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rm -f $(1).tmp; \
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$(foreach var, $(BUILD_MAKE_VARS), \
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echo "#define $(var) \"$($(var))\"" >>$(1).tmp;) \
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$(call move-if-changed,$(1).tmp,$(1))
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endef
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ifeq ($(debug_symbols),y)
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CFLAGS += -g
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endif
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CFLAGS += -fno-strict-aliasing
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CFLAGS += -std=gnu99
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CFLAGS += -Wall -Wstrict-prototypes
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# Clang complains about macros that expand to 'if ( ( foo == bar ) ) ...'
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# and is over-zealous with the printf format lint
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# and is a bit too fierce about unused return values
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CFLAGS-$(clang) += -Wno-parentheses -Wno-format -Wno-unused-value
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$(call cc-option-add,HOSTCFLAGS,HOSTCC,-Wdeclaration-after-statement)
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$(call cc-option-add,CFLAGS,CC,-Wdeclaration-after-statement)
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$(call cc-option-add,CFLAGS,CC,-Wno-unused-but-set-variable)
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$(call cc-option-add,CFLAGS,CC,-Wno-unused-local-typedefs)
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LDFLAGS += $(foreach i, $(EXTRA_LIB), -L$(i))
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CFLAGS += $(foreach i, $(EXTRA_INCLUDES), -I$(i))
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LDFLAGS += $(foreach i, $(PREPEND_LIB), -L$(i))
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CFLAGS += $(foreach i, $(PREPEND_INCLUDES), -I$(i))
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ifeq ($(XEN_TOOLS_RPATH),y)
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LDFLAGS += -Wl,-rpath,$(libdir)
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endif
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APPEND_LDFLAGS += $(foreach i, $(APPEND_LIB), -L$(i))
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APPEND_CFLAGS += $(foreach i, $(APPEND_INCLUDES), -I$(i))
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EMBEDDED_EXTRA_CFLAGS := -nopie -fno-stack-protector -fno-stack-protector-all
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EMBEDDED_EXTRA_CFLAGS += -fno-exceptions
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XEN_EXTFILES_URL ?= http://xenbits.xen.org/xen-extfiles
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# All the files at that location were downloaded from elsewhere on
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# the internet. The original download URL is preserved as a comment
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# near the place in the Xen Makefiles where the file is used.
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# Where to look for inlined subtrees (for example, from a tarball)
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QEMU_UPSTREAM_INTREE ?= $(XEN_ROOT)/tools/qemu-xen
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QEMU_TRADITIONAL_INTREE ?= $(XEN_ROOT)/tools/qemu-xen-traditional
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# Handle legacy options
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ifneq (,$(SEABIOS_UPSTREAM_TAG))
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SEABIOS_UPSTREAM_REVISION ?= $(SEABIOS_UPSTREAM_TAG)
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endif
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ifneq (,$(QEMU_REMOTE))
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QEMU_TRADITIONAL_URL ?= $(QEMU_REMOTE)
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endif
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ifneq (,$(CONFIG_QEMU))
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QEMU_TRADITIONAL_LOC ?= $(CONFIG_QEMU)
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endif
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ifneq (,$(QEMU_TAG))
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QEMU_TRADITIONAL_REVISION ?= $(QEMU_TAG)
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endif
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ifeq ($(GIT_HTTP),y)
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OVMF_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/ovmf.git
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QEMU_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/qemu-xen.git
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QEMU_TRADITIONAL_URL ?= http://xenbits.xen.org/git-http/qemu-xen-traditional.git
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SEABIOS_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/seabios.git
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MINIOS_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/mini-os.git
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else
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OVMF_UPSTREAM_URL ?= git://xenbits.xen.org/ovmf.git
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QEMU_UPSTREAM_URL ?= git://xenbits.xen.org/qemu-xen.git
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QEMU_TRADITIONAL_URL ?= git://xenbits.xen.org/qemu-xen-traditional.git
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SEABIOS_UPSTREAM_URL ?= git://xenbits.xen.org/seabios.git
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MINIOS_UPSTREAM_URL ?= git://xenbits.xen.org/mini-os.git
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endif
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OVMF_UPSTREAM_REVISION ?= 52a99493cce88a9d4ec8a02d7f1bd1a1001ce60d
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QEMU_UPSTREAM_REVISION ?= master
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MINIOS_UPSTREAM_REVISION ?= e085b7e5613576601e2f100e6f1ee9e0778c3eb9
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# Sun Apr 10 00:46:32 2016 +0200
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# Fix time update
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SEABIOS_UPSTREAM_REVISION ?= rel-1.9.2
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# Tue, 1 Mar 2016 15:06:45 +0100 (16:06 +0200)
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# fw/pci: add Q35 S3 support
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ETHERBOOT_NICS ?= rtl8139 8086100e
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QEMU_TRADITIONAL_REVISION ?= 21f6526d1da331611ac5fe12967549d1a04e149b
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# Fri Jan 15 13:23:56 2016 +0000
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# qemu-xen-traditional: Add libxenforeignmemory to rpath-link
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# Specify which qemu-dm to use. This may be `ioemu' to use the old
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# Mercurial in-tree version, or a local directory, or a git URL.
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# QEMU_UPSTREAM_LOC ?= `pwd`/$(XEN_ROOT)/../qemu-xen.git
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# Defaults for subtree locations
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QEMU_TRADITIONAL_LOC ?= $(call or,$(wildcard $(QEMU_TRADITIONAL_INTREE)),\
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$(QEMU_TRADITIONAL_URL))
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QEMU_UPSTREAM_LOC ?= $(call or,$(wildcard $(QEMU_UPSTREAM_INTREE)),\
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$(QEMU_UPSTREAM_URL))
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# Short answer -- do not enable this unless you know what you are
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# doing and are prepared for some pain.
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CONFIG_TESTS ?= y
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