The 3dnow and 3dnowext USE flags are being enabled by default. Even if these don't actually do anything when compiling for a CPU without these extensions, they can confuse users. Reproducible: Always Steps to Reproduce: 1. Use a system without USE="3dnow 3dnowext" 2. emerge -pv =media-video/ffmpeg-0.5-r1 Actual Results: 3dnow and 3dnowext are enabled. Expected Results: 3dnow and 3dnowext should be disabled unless the user explicitly specifies them in USE. Portage 2.1.6.11 (default/linux/amd64/2008.0/desktop, gcc-4.3.2, glibc-2.8_p20080602-r1, 2.6.28-gentoo-r5 x86_64) ================================================================= System uname: Linux-2.6.28-gentoo-r5-x86_64-Intel-R-_Core-TM-2_Duo_CPU_T8100_@_2.10GHz-with-glibc2.2.5 Timestamp of tree: Sat, 16 May 2009 15:30:01 +0000 app-shells/bash: 3.2_p39 dev-lang/python: 2.5.4-r2 dev-util/cmake: 2.6.2-r1 sys-apps/baselayout: 1.12.11.1 sys-apps/sandbox: 1.6-r2 sys-devel/autoconf: 2.13, 2.63 sys-devel/automake: 1.5, 1.9.6-r2, 1.10.2 sys-devel/binutils: 2.18-r3 sys-devel/gcc-config: 1.4.0-r4 sys-devel/libtool: 1.5.26 virtual/os-headers: 2.6.27-r2 ACCEPT_KEYWORDS="amd64" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/udev/rules.d" CPPFLAGS="-DNDEBUG" CXXFLAGS="-march=native -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="collision-protect distlocks fixpackages parallel-fetch protect-owned sandbox sfperms strict unmerge-orphans userfetch" GENTOO_MIRRORS="http://gentoo.tups.lv/source/" LANG="ru_RU.UTF-8" LC_ALL="ru_RU.UTF-8" LDFLAGS="-Wl,-O1" LINGUAS="ru en lv" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X aac acpi alsa amd64 avahi bash-completion berkdb bluetooth bonjour branding bzip2 cairo cdr cli cracklib crypt cups dbus djvu dri dvd dvdr dvdread eds emboss encode evo exif fam ffmpeg firefox flac fortran gdbm gif gnome gnome-keyring gpm gstreamer gtk hal hddtemp iconv id3tag ieee1394 ipod isdnlog jpeg libnotify lm_sensors mad midi mikmod mmx mmxext mp3 mpeg mudflap multilib nautilus ncurses networkmanager nls nptl nptlonly nsplugin ogg opengl openmp pam pcre pdf perl png ppds pppd python qt3support quicktime readline reflection rtc samba sdl session smp spell spl sqlite sse sse2 sse3 sse4_1 ssl ssse3 startup-notification svg symlink sysfs tcpd theora threads tiff totem truetype unicode upnp usb v4l2 vim-syntax vorbis x264 xml xorg xulrunner xv xvid xvmc zeroconf zlib" 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" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="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 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" ELIBC="glibc" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="ru en lv" USERLAND="GNU" VIDEO_CARDS="intel" Unset: CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
It has been asked by upstream, it doesn't cause any issue since 3dnow is used only if the cpu supports it. It slightly adds some bytes and compile time but people concerned can disable that part...
