Trying to build qemu in a fresh stage3 breaks because the dependencies were moved into SOFTMMU_LIB_DEPEND, which isn't included in DEPEND. You will see configure failures such as this: ERROR: User requested feature linux AIO configure was not able to find it. Install libaio devel USE="aio gnutls libcap jpeg ncurses" are among the affected USE flags, although this affects nearly all QEMU USE flags.
# emerge --info Portage 2.3.1 (python 2.7.12-final-0, hardened/linux/musl/amd64, gcc-4.9.4, musl-1.1.15-r2, 4.7.10-hardened x86_64) ================================================================= System uname: Linux-4.7.10-hardened-x86_64-Intel-R-_Xeon-R-_CPU_E5-1620_0_@_3.60GHz-with-gentoo-2.3 KiB Mem: 65745992 total, 59728524 free KiB Swap: 0 total, 0 free Timestamp of repository gentoo: Wed, 22 Feb 2017 00:45:01 +0000 sh dash 0.5.8.2 ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1 app-shells/bash: 4.3_p48-r1::gentoo dev-lang/perl: 5.22.3_rc4::gentoo dev-lang/python: 2.7.12::gentoo, 3.4.5::gentoo dev-util/cmake: 3.7.2::gentoo sys-apps/baselayout: 2.3::gentoo sys-apps/openrc: 0.22.4::gentoo sys-apps/sandbox: 2.10-r1::musl sys-devel/autoconf: 2.69::gentoo sys-devel/automake: 1.14.1::gentoo, 1.15::gentoo sys-devel/binutils: 2.25.1-r1::gentoo sys-devel/gcc: 4.9.4-r99::musl sys-devel/gcc-config: 1.7.3::gentoo sys-devel/libtool: 2.4.6-r3::gentoo sys-devel/make: 4.2.1::gentoo sys-kernel/linux-headers: 4.4::gentoo (virtual/os-headers) sys-libs/musl: 1.1.15-r2::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-gentoo-linux-musl" CFLAGS="-O2 -mtune=native -ggdb -pipe" CHOST="x86_64-gentoo-linux-musl" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -mtune=native -ggdb -pipe" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles installsources merge-sync news parallel-fetch parallel-install preserve-libs protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" INSTALL_MASK="charset.alias" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j8" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" USE="amd64 bindist cli cracklib crypt cxx dri fortran hardened iconv ipv6 mmx modules ncurses nls nptl openmp pam pax_kernel pcre pic readline seccomp session sse sse2 ssl tcpd unicode xattr zlib" ABI_X86="64" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2" ELIBC="musl" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby21" USERLAND="GNU" VIDEO_CARDS="dummy fbdev v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, LANG, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
USE=qemu_softmmu_targets_x86_64 works around the problem by making dependencies work.
Reproduced on standard default/linux/amd64/13.0 profile.
don't see this as being a major issue or a regression seeing as how we didn't really support tools-only builds in the past we already have this issue documented in the ebuild but haven't focused on it because it's an uncommon scenario # TODO: Split out tools deps into another var. e.g. bzip2 is only used by # system binaries and tools, not user binaries.
Ah, I totally missed the elevated priority this morning. Yes, I agree. This has at most standard importance. I will have a look at building a minimal qemu (without any targets) on a minimal stage-3 sometime later. It is also a good opportunity to check whether the static-* use flags still work as advertised.
After having spent roughly 4h with the dependency tree, I have pushed qemu-2.8.0-r5 to the tree and updated qemu-9999. I have unified the dependencies, i.e. there is no separate list of tool, user target and softmmu target dependencies any more. The reason for this change is the observation that: - Almost all dependencies that were exclusively listed in SOFTMMU_LIBS_DEPEND are needed for qemu user targets as well. This is evidenced by trying to compile qemu with USE="* -static -static-softmmu -static-user" QEMU_USER_TARGETS="*" QEMU_SOFTMMU_TARGETS="" in a minimal stage-3 environment. - The same holds true for the qemu tools. All in all, only 4 dependencies were softmmu-target specific and these were alsa? ( >=media-libs/alsa-lib-1.0.13 ) fdt? ( >=sys-apps/dtc-1.4.0[static-libs(+)] ) pulseaudio? ( media-sound/pulseaudio ) seccomp? ( >=sys-libs/libseccomp-2.1.0[static-libs(+)] ) So after all it is simply not worth the effort to maintain a separate list of dependencies (and in fact we didn't, e.g. USE"* -static*" QEMU_USER_TARGETS="*", QEMU_SOFTMMU_TARGETS="" was simply broken). Further, I have removed the artificial split of the static keyword into static- softmmu and static-user. Now, USE="static" controls exclusively whether all user and softmmus targets as well as the qemu tools will be compiled as static executable. commit e6788f4442a0daaf2a75cc6302e5f0ef104c3624 commit c9eac4cbe40417c25e455aada13593f7824f42ef commit 159a538312f81e42a78e1905a34f3ef49f30b93c
Short correction to my previous comment: I have reintroduced the "static-user" use flag. It is every convenient for a scenario where static user target binaries for chroots are needed but the system targets (and tools) should still be linked dynamically. So the choice is now: USE="-static-user -static" USE=" static-user -static" - only qemu user targets are linked statically. USE=" static-user static" - everything is linked statically. commit 1d79efd4de863153d918cb3dd66ec9a1c595e9b7 commit 6e259a58ba456e822ebb21e60b585eef905f65aa
