Beginning with dev-java/icedtea-7.2.4.5, the "systemtap" USE flag is ignored. With that version onwards, dev-util/systemtap is a required and non-optional dependency when installing via Portage. dev-java/icedtea-7.2.4.3 does not have this problem. According to the icedtea homepage, systemtap is an optional dependency. They explain it this way: "When using the systemtap tracing support (--enable-systemtap), the following additional requirement apply: systemtap-sdt-devel". Please see http://icedtea.classpath.org/wiki/BuildRequirements as a reference for the above. It appears that this is a bug in the ebuild. Upstream made this a build-time configuration option. -------------------------- Emerge output: (note: the behavior is the same even if it is run as "USE="-systemtap" emerge --pretend dev-java/icedtea") # emerge --pretend dev-java/icedtea These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild N ] dev-util/systemtap-2.4 USE="-sqlite" [ebuild U ~] dev-java/icedtea-7.2.4.7 [7.2.4.3] USE="-cacao% -jamvm% -zero%" * IMPORTANT: 2 news items need reading for repository 'gentoo'. * Use eselect news to read news items. # -------------------------- (note: I currently do not have dev-util/systemtap installed) Emerge output of older version dev-java/icedtea-7.2.4.3: # emerge --pretend =dev-java/icedtea-7.2.4.3 These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild R ~] dev-java/icedtea-7.2.4.3 * IMPORTANT: 2 news items need reading for repository 'gentoo'. * Use eselect news to read news items. # -------------------------- Output of "emerge --info" on this machine: Portage 2.2.8-r1 (default/linux/amd64/13.0, gcc-4.7.3, glibc-2.17, 3.14.0-gentoo x86_64) ================================================================= System uname: Linux-3.14.0-gentoo-x86_64-AMD_Athlon-tm-_II_X2_250_Processor-with-gentoo-2.2 KiB Mem: 8170172 total, 325284 free KiB Swap: 2246652 total, 2246524 free Timestamp of tree: Tue, 22 Apr 2014 22:15:01 +0000 ld GNU ld (GNU Binutils) 2.23.2 ccache version 3.1.9 [disabled] app-shells/bash: 4.2_p45 dev-java/java-config: 2.2.0 dev-lang/python: 2.7.5-r3, 3.3.3 dev-util/ccache: 3.1.9-r3 dev-util/cmake: 2.8.12.2 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.12.4 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.11.6, 1.12.6, 1.13.4 sys-devel/binutils: 2.23.2 sys-devel/gcc: 4.7.3-r1 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.9 (virtual/os-headers) sys-libs/glibc: 2.17 Repositories: gentoo ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -finline-functions -ftracer -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /var/lib/hsqldb" 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="-march=native -O2 -finline-functions -ftracer -pipe" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--with-bdeps=y" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://gentoo.mirrors.tds.net/gentoo http://gentoo.netnitco.net http://mirror.datapipe.net/gentoo" LANG="en_US.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j3" 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" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.us.gentoo.org/gentoo-portage" USE="3dnow 3dnowext X \ a52 aac aalib acl alsa amd64 bash-completion berkdb bzip2 cli consolekit cracklib crypt cxx dri encode ffmpeg flac fortran gdbm gtk iconv ipv6 jpeg jpeg2k kde libnotify lzma mad mmx mmxext modules mp3 mpeg mplayer multilib mysql ncurses nls nptl offensive ogg opengl openmp openssl pam pcre pdf png policykit python qt3support qt4 readline sdl session socks5 sse sse2 ssl symlink tcpd truetype udev unicode videos vorbis win32codecs wmf x264 xcomposite xine xml xscreensaver xv xvid zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" 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" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="keyboard mouse evdev" 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="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="nvidia nv vesa" 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: CPPFLAGS, CTARGET, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
the linked wiki article is true for icedtea 6, but not 7. on the (currently supported) version of icedtea7, systemtap will be automagically used if its present (--enable-systemtap is gone)
There is no systemtap USE flag anymore for 2.x.
"Used if present" is not congruent with "Pull in systemtap" as a missing dependency. That is unexpected behaviour for what is clearly an optional component. KProbes in kernel config defaults to "N" after all.
I'm not sure whether it is possible to build 7 without systemtap any more but it is a hard dependency in the ebuild and unless gnu_andrew says it's okay, I don't intend to make it optional again.
