When I want to install QEMU from source code, I followed this article's recommended method of installation Emulating CXL Shared Memory Devices in QEMU.when I started to make ,errors happened.
[1117/2990] Compiling C object libqemuutil.a.p/util_userfaultfd.c.oFAILED: libqemuutil.a.p/util_userfaultfd.c.o cc -m64 -mcx16 -Ilibqemuutil.a.p -I. -I.. -Isubprojects/libvhost-user -I../subprojects/libvhost-user -Iqapi -Itrace -Iui -Iui/shader -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/gio-unix-2.0 -I/usr/include/pixman-1 -fdiagnostics-color=auto -Wall -Winvalid-pch -Werror -std=gnu11 -O2 -g -fstack-protector-strong -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -Wundef -Wwrite-strings -Wmissing-prototypes -Wstrict-prototypes -Wredundant-decls -Wold-style-declaration -Wold-style-definition -Wtype-limits -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wempty-body -Wnested-externs -Wendif-labels -Wexpansion-to-defined -Wimplicit-fallthrough=2 -Wmissing-format-attribute -Wno-missing-include-dirs -Wno-shift-negative-value -Wno-psabi /mnt/nvme0/home/shs/qemu/linux-headers linux-headers -iquote . -iquote /mnt/nvme0/home/shs/qemu -iquote /mnt/nvme0/home/shs/qemu/include -iquote /mnt/nvme0/home/shs/qemu/host/include/x86_64 -iquote /mnt/nvme0/home/shs/qemu/host/include/generic -iquote /mnt/nvme0/home/shs/qemu/tcg/i386 -pthread -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-strict-aliasing -fno-common -fwrapv -fPIE -MD -MQ libqemuutil.a.p/util_userfaultfd.c.o -MF libqemuutil.a.p/util_userfaultfd.c.o.d -o libqemuutil.a.p/util_userfaultfd.c.o -c ../util/userfaultfd.c../util/userfaultfd.c: In function ‘uffd_open’:../util/userfaultfd.c:54:32: error: ‘USERFAULTFD_IOC_NEW’ undeclared (first use in this function); did you mean ‘USERFAULTFD_H’? 54 | return ioctl(uffd_dev, USERFAULTFD_IOC_NEW, flags); | ^~~~~~~~~~~~~~~~~~~ | USERFAULTFD_H../util/userfaultfd.c:54:32: note: each undeclared identifier is reported only once for each function it appears inthe error is that USERFAULTFD_IOC_NEW can't be find,there is no USERFAULTFD_IOC_NEW in /usr/include/linux/userfaultfd.h , however ,there is a linux-headers folder ，USERFAULTFD_IOC_NEW is definded in qemu/linux-headers/linux/userfaultfd.h.Combined with the /mnt/nvme0/home/shs/qemu/linux-headers linux-headers in the compile command, it may be that the headers in this folder are intended to replace the headers in /usr/include/linux, but I don't know why it didn't work.my cpu is AMD EPYC 7773X 64-Core Processor ,linux is Ubuntu 22.04.2 LTThis warning also appears when compiling other files：
[1331/2990] Compiling C object libblock.fa.p/block_blklogwrites.c.occ: warning: /mnt/nvme0/home/shs/qemu/linux-headers: linker input file unused because linking not donecc: warning: linux-headers: linker input file unused because linking not done[1332/2990] Compiling C object tests/qtest/libqos/libqos.fa.p/pci.c.occ: warning: /mnt/nvme0/home/shs/qemu/linux-headers: linker input file unused because linking not donecc: warning: linux-headers: linker input file unused because linking not done[1333/2990] Compiling C object libblock.fa.p/block_backup.c.oconfigure commond:
../configure --prefix=/opt/qemu-jic23 --target-list=i386-softmmu,x86_64-softmmu --enable-libpmem --enable-slirpthe makefile is as below:
# Makefile for QEMU.ifneq ($(words $(subst :, ,$(CURDIR))), 1) $(error main directory cannot contain spaces nor colons)endif# Always point to the root of the build tree (needs GNU make).BUILD_DIR=$(CURDIR)# Before including a proper config-host.mak, assume we are in the source treeSRC_PATH=.# Don't use implicit rules or variables# we have explicit rules for everythingMAKEFLAGS += -rRSHELL = bash -o pipefail# Usage: $(call quiet-command,command and args,"NAME","args to print")# This will run "command and args", and either:# if V=1 just print the whole command and args# otherwise print the 'quiet' output in the format " NAME args to print"# NAME should be a short name of the command, 7 letters or fewer.# If called with only a single argument, will print nothing in quiet mode.quiet-command-run = $(if $(V),,$(if $2,printf " %-7s %s\n" $2 $3 && ))$1quiet-@ = $(if $(V),,@)quiet-command = $(quiet-@)$(call quiet-command-run,$1,$2,$3)UNCHECKED_GOALS := TAGS gtags cscope ctags dist \ help check-help print-% \ docker docker-% vm-help vm-test vm-build-%all:.PHONY: all clean distclean recurse-all dist msi FORCE# Don't try to regenerate Makefile or configure# We don't generate any of themMakefile: ;configure: ;# All following code might depend on configuration variablesifneq ($(wildcard config-host.mak),)include config-host.makinclude Makefile.prereqsMakefile.prereqs: config-host.makgit-submodule-update:.git-submodule-status: git-submodule-update config-host.makMakefile: .git-submodule-status.PHONY: git-submodule-updategit-submodule-update:ifneq ($(GIT_SUBMODULES_ACTION),ignore) $(call quiet-command, \ (GIT="$(GIT)" "$(SRC_PATH)/scripts/git-submodule.sh" $(GIT_SUBMODULES_ACTION) $(GIT_SUBMODULES)), \"GIT","$(GIT_SUBMODULES)")endif# 0. ensure the build tree is okay# Check that we're not trying to do an out-of-tree build from# a tree that's been used for an in-tree build.ifneq ($(realpath $(SRC_PATH)),$(realpath .))ifneq ($(wildcard $(SRC_PATH)/config-host.mak),)$(error This is an out of tree build but your source tree ($(SRC_PATH)) \seems to have been used for an in-tree build. You can fix this by running \"$(MAKE) distclean && rm -rf *-linux-user *-softmmu" in your source tree)endifendif# force a rerun of configure if config-host.mak is too old or corruptedifeq ($(MESON),).PHONY: config-host.makx := $(shell rm -rf meson-private meson-info meson-logs)endififeq ($(NINJA),).PHONY: config-host.makx := $(shell rm -rf meson-private meson-info meson-logs)elseexport NINJAendififeq ($(wildcard build.ninja),).PHONY: config-host.makx := $(shell rm -rf meson-private meson-info meson-logs)endififeq ($(origin prefix),file).PHONY: config-host.makx := $(shell rm -rf meson-private meson-info meson-logs)endif# 1. ensure config-host.mak is up-to-dateconfig-host.mak: $(SRC_PATH)/configure $(SRC_PATH)/scripts/meson-buildoptions.sh $(SRC_PATH)/VERSION @echo config-host.mak is out-of-date, running configure @if test -f meson-private/coredata.dat; then \ ./config.status --skip-meson; \ else \ ./config.status && touch build.ninja.stamp; \ fi# 2. meson.stamp exists if meson has run at least once (so ninja reconfigure# works), but otherwise never needs to be updatedmeson-private/coredata.dat: meson.stampmeson.stamp: config-host.mak @touch meson.stamp# 3. ensure generated build files are up-to-dateifneq ($(NINJA),)Makefile.ninja: build.ninja $(quiet-@){ \ echo 'ninja-targets = \'; \ $(NINJA) -t targets all | sed 's/:.*//; $$!s/$$/ \\/'; \ echo 'build-files = \'; \ $(NINJA) -t query build.ninja | sed -n '1,/^ input:/d; /^ outputs:/q; s/$$/ \\/p'; \ } > $@.tmp && mv $@.tmp $@-include Makefile.ninjaendififneq ($(MESON),)# A separate rule is needed for Makefile dependencies to avoid -nbuild.ninja: build.ninja.stamp$(build-files):build.ninja.stamp: meson.stamp $(build-files) $(MESON) setup --reconfigure $(SRC_PATH) && touch $@Makefile.mtest: build.ninja scripts/mtest2make.py $(MESON) introspect --targets --tests --benchmarks | $(PYTHON) scripts/mtest2make.py > $@-include Makefile.mtest.PHONY: update-buildoptionsall update-buildoptions: $(SRC_PATH)/scripts/meson-buildoptions.sh$(SRC_PATH)/scripts/meson-buildoptions.sh: $(SRC_PATH)/meson_options.txt $(MESON) introspect --buildoptions $(SRC_PATH)/meson.build | $(PYTHON) \ scripts/meson-buildoptions.py > $@.tmp && mv $@.tmp $@endif# 4. Rules to bridge to other makefilesifneq ($(NINJA),)# Filter out long options to avoid flags like --no-print-directory which# may result in false positive match for MAKE.nMAKE.n = $(findstring n,$(firstword $(filter-out --%,$(MAKEFLAGS))))MAKE.k = $(findstring k,$(firstword $(filter-out --%,$(MAKEFLAGS))))MAKE.q = $(findstring q,$(firstword $(filter-out --%,$(MAKEFLAGS))))MAKE.nq = $(if $(word 2, $(MAKE.n) $(MAKE.q)),nq)NINJAFLAGS = $(if $V,-v) $(if $(MAKE.n), -n) $(if $(MAKE.k), -k0) \ $(filter-out -j, $(lastword -j1 $(filter -l% -j%, $(MAKEFLAGS)))) \ -d keepdepfileninja-cmd-goals = $(or $(MAKECMDGOALS), all)ninja-cmd-goals += $(foreach g, $(MAKECMDGOALS), $(.ninja-goals.$g))makefile-targets := build.ninja ctags TAGS cscope dist clean# "ninja -t targets" also lists all prerequisites. If build system# files are marked as PHONY, however, Make will always try to execute# "ninja build.ninja".ninja-targets := $(filter-out $(build-files) $(makefile-targets), $(ninja-targets)).PHONY: $(ninja-targets) run-ninja$(ninja-targets): run-ninja# Use "| cat" to give Ninja a more "make-y" output. Use "+" to bypass the# --output-sync line.run-ninja: config-host.makifneq ($(filter $(ninja-targets), $(ninja-cmd-goals)),)+$(if $(MAKE.nq),@:,$(quiet-@)$(NINJA) $(NINJAFLAGS) \ $(sort $(filter $(ninja-targets), $(ninja-cmd-goals))) | cat)endifendififeq ($(CONFIG_PLUGIN),y).PHONY: pluginsplugins: $(call quiet-command,\ $(MAKE) $(SUBDIR_MAKEFLAGS) -C contrib/plugins V="$(V)", \"BUILD", "example plugins")endif # $(CONFIG_PLUGIN)else # config-host.mak does not existifneq ($(filter-out $(UNCHECKED_GOALS),$(MAKECMDGOALS)),$(if $(MAKECMDGOALS),,fail))$(error Please call configure before running make)endifendif # config-host.mak does not existSUBDIR_MAKEFLAGS=$(if $(V),,--no-print-directory --quiet)include $(SRC_PATH)/tests/Makefile.includeall: recurse-allROMS_RULES=$(foreach t, all clean distclean, $(addsuffix /$(t), $(ROMS))).PHONY: $(ROMS_RULES)$(ROMS_RULES): $(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C $(dir $@) V="$(V)" TARGET_DIR="$(dir $@)" $(notdir $@),).PHONY: recurse-all recurse-cleanrecurse-all: $(addsuffix /all, $(ROMS))recurse-clean: $(addsuffix /clean, $(ROMS))recurse-distclean: $(addsuffix /distclean, $(ROMS))######################################################################clean: recurse-clean -$(quiet-@)test -f build.ninja && $(NINJA) $(NINJAFLAGS) -t clean || : -$(quiet-@)test -f build.ninja && $(NINJA) $(NINJAFLAGS) clean-ctlist || : find . \( -name '*.so' -o -name '*.dll' -o \ -name '*.[oda]' -o -name '*.gcno' \) -type f \ ! -path ./roms/edk2/ArmPkg/Library/GccLto/liblto-aarch64.a \ ! -path ./roms/edk2/ArmPkg/Library/GccLto/liblto-arm.a \ -exec rm {} + rm -f TAGS cscope.* *~ */*~VERSION = $(shell cat $(SRC_PATH)/VERSION)dist: qemu-$(VERSION).tar.bz2qemu-%.tar.bz2: $(SRC_PATH)/scripts/make-release "$(SRC_PATH)" "$(patsubst qemu-%.tar.bz2,%,$@)"distclean: clean recurse-distclean -$(quiet-@)test -f build.ninja && $(NINJA) $(NINJAFLAGS) -t clean -g || : rm -f config-host.mak Makefile.prereqs rm -f tests/tcg/*/config-target.mak tests/tcg/config-host.mak rm -f config.status rm -f roms/seabios/config.mak rm -f qemu-plugins-ld.symbols qemu-plugins-ld64.symbols rm -f *-config-target.h *-config-devices.mak *-config-devices.h rm -rf meson-private meson-logs meson-info compile_commands.json rm -f Makefile.ninja Makefile.mtest build.ninja.stamp meson.stamp rm -f config.log rm -f linux-headers/asm rm -Rf .sdk qemu-bundlefind-src-path = find "$(SRC_PATH)" -path "$(SRC_PATH)/meson" -prune -o \ -type l -prune -o \( -name "*.[chsS]" -o -name "*.[ch].inc" \).PHONY: ctagsctags: $(call quiet-command, \ rm -f "$(SRC_PATH)/"tags, \"CTAGS", "Remove old tags") $(call quiet-command, \ $(find-src-path) -exec ctags \ -f "$(SRC_PATH)/"tags --append {} +, \"CTAGS", "Re-index $(SRC_PATH)").PHONY: gtagsgtags: $(call quiet-command, \ rm -f "$(SRC_PATH)/"GTAGS; \ rm -f "$(SRC_PATH)/"GRTAGS; \ rm -f "$(SRC_PATH)/"GPATH, \"GTAGS", "Remove old $@ files") $(call quiet-command, \ (cd $(SRC_PATH) && \ $(find-src-path) -print | gtags -f -), \"GTAGS", "Re-index $(SRC_PATH)").PHONY: TAGSTAGS: $(call quiet-command, \ rm -f "$(SRC_PATH)/"TAGS, \"TAGS", "Remove old $@") $(call quiet-command, \ $(find-src-path) -exec etags \ -f "$(SRC_PATH)/"TAGS --append {} +, \"TAGS", "Re-index $(SRC_PATH)").PHONY: cscopecscope: $(call quiet-command, \ rm -f "$(SRC_PATH)/"cscope.* , \"cscope", "Remove old $@ files") $(call quiet-command, \ ($(find-src-path) -print | sed -e 's,^\./,,' \> "$(SRC_PATH)/cscope.files"), \"cscope", "Create file list") $(call quiet-command, \ cscope -b -i"$(SRC_PATH)/cscope.files" \ -f"$(SRC_PATH)"/cscope.out, \"cscope", "Re-index $(SRC_PATH)")# Needed by "meson install"export DESTDIRinclude $(SRC_PATH)/tests/lcitool/Makefile.includeinclude $(SRC_PATH)/tests/docker/Makefile.includeinclude $(SRC_PATH)/tests/vm/Makefile.includeprint-help-run = printf " %-30s - %s\\n" "$1" "$2"print-help = @$(call print-help-run,$1,$2).PHONY: helphelp: @echo 'Generic targets:' $(call print-help,all,Build all) $(call print-help,dir/file.o,Build specified target only) $(call print-help,install,Install QEMU, documentation and tools) $(call print-help,ctags/gtags/TAGS,Generate tags file for editors) $(call print-help,cscope,Generate cscope index) $(call print-help,sparse,Run sparse on the QEMU source) @echo ''ifeq ($(CONFIG_PLUGIN),y) @echo 'Plugin targets:' $(call print-help,plugins,Build the example TCG plugins) @echo ''endif @echo 'Cleaning targets:' $(call print-help,clean,Remove most generated files but keep the config) $(call print-help,distclean,Remove all generated files) $(call print-help,dist,Build a distributable tarball) @echo '' @echo 'Test targets:' $(call print-help,check,Run all tests (check-help for details)) $(call print-help,bench,Run all benchmarks) $(call print-help,lcitool-help,Help about targets for managing build environment manifests) $(call print-help,docker-help,Help about targets running tests inside containers) $(call print-help,vm-help,Help about targets running tests inside VM) @echo '' @echo 'Documentation targets:' $(call print-help,html man,Build documentation in specified format) @echo ''ifdef CONFIG_WIN32 @echo 'Windows targets:' $(call print-help,installer,Build NSIS-based installer for QEMU) $(call print-help,msi,Build MSI-based installer for qemu-ga) @echo ''endif $(call print-help,$(MAKE) [targets],(quiet build, default)) $(call print-help,$(MAKE) V=1 [targets],(verbose build))# will delete the target of a rule if commands exit with a nonzero exit status.DELETE_ON_ERROR:print-%: @echo '$*=$($*)'I don't know the reason of this problem.Does anyone know why this error occurs and how to fix it?If anyone can help me, I'd appreciate it.
