I am running a virtual server under vmware, and since there is no real display hardware, I set up my use flags to include "-opengl -v4l". Now, if I emerge the kdenetworks package, I get an error, see transcript below. I am advised to re-emerge qt with USE="opengl", buth that's something I do not want to do. If it is really the v4l support that requires opengl, then I think kdenetwork should honor the USE="-v4l" setting. >>> Emerging (1 of 43) kde-base/kdenetwork-3.5.5-r2 to / * kdenetwork-3.5-patchset-01.tar.bz2 MD5 ;-) ... [ ok ] * kdenetwork-3.5-patchset-01.tar.bz2 RMD160 ;-) ... [ ok ] * kdenetwork-3.5-patchset-01.tar.bz2 SHA1 ;-) ... [ ok ] * kdenetwork-3.5-patchset-01.tar.bz2 SHA256 ;-) ... [ ok ] * kdenetwork-3.5-patchset-01.tar.bz2 size ;-) ... [ ok ] * kdenetwork-3.5.5.tar.bz2 MD5 ;-) ... [ ok ] * kdenetwork-3.5.5.tar.bz2 RMD160 ;-) ... [ ok ] * kdenetwork-3.5.5.tar.bz2 SHA1 ;-) ... [ ok ] * kdenetwork-3.5.5.tar.bz2 SHA256 ;-) ... [ ok ] * kdenetwork-3.5.5.tar.bz2 size ;-) ... [ ok ] * checking ebuild checksums ;-) ... [ ok ] * checking auxfile checksums ;-) ... [ ok ] * checking miscfile checksums ;-) ... [ ok ] * checking kdenetwork-3.5.5.tar.bz2 ;-) ... [ ok ] * checking kdenetwork-3.5-patchset-01.tar.bz2 ;-) ... [ ok ] QA Notice: USE Flag 'kernel_linux' not in IUSE for kde-base/kdenetwork-3.5.5-r2 * To support Video4Linux webcams in this package is required to have * =x11-libs/qt-3* compiled with OpenGL support. * Please reemerge =x11-libs/qt-3* with USE="opengl". !!! ERROR: kde-base/kdenetwork-3.5.5-r2 failed. Call stack: ebuild.sh, line 1562: Called dyn_setup ebuild.sh, line 665: Called pkg_setup kdenetwork-3.5.5-r2.ebuild, line 56: Called die !!! Please reemerge =x11-libs/qt-3* with USE="opengl". !!! If you need support, post the topmost build error, and the call stack if relevant. Reproducible: Always Expected Results: kdenetwork should honor USE="-v4l" and not depend on opengl support being built into qt in this case. ahr040s ~ # emerge --info Portage 2.1.1-r2 (default-linux/x86/2006.1, gcc-4.1.1, glibc-2.4-r4, 2.6.19.2 i686) ================================================================= System uname: 2.6.19.2 i686 AMD Opteron (tm) Processor 850 Gentoo Base System version 1.12.6 Last Sync: Fri, 26 Jan 2007 10:20:02 +0000 app-admin/eselect-compiler: [Not Present] dev-java/java-config: 1.3.7, 2.0.31 dev-lang/python: 2.4.3-r4 dev-python/pycrypto: 2.0.1-r5 dev-util/ccache: [Not Present] dev-util/confcache: [Not Present] sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.61 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10 sys-devel/binutils: 2.16.1-r3 sys-devel/gcc-config: 1.3.14 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.17-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-pipe -O3 -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config" CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf /etc/java-config/vms/ /etc/revdep-rebuild /etc/terminfo" CXXFLAGS="-pipe -O3 -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks metadata-transfer parallel-fetch sandbox sfperms strict userfetch userpriv" GENTOO_MIRRORS="ftp://ftp.tu-clausthal.de/pub/linux/gentoo/ ftp://sunsite.informatik.rwth-aachen.de/pub/Linux/gentoo ftp://linux.rz.ruhr-uni-bochum.de/gentoo-mirror/ ftp://ftp.uni-erlangen.de/pub/mirrors/gentoo ftp://ftp.join.uni-muenster.de/pub/linux/distributions/gentoo ftp://ftp.wh2.tu-dresden.de/pub/mirrors/gentoo ftp://ftp.join.uni-muenster.de/pub/linux/distributions/gentoo ftp://ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/ ftp://ftp.gentoo.mesh-solutions.com/gentoo/ ftp://pandemonium.tiscali.de/pub/gentoo/ " LINGUAS="de es fr uk" PKGDIR="/usr/portage/packages" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude='/distfiles' --exclude='/local' --exclude='/packages'" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="x86 X alsa_cards_ali5451 alsa_cards_als4000 alsa_cards_atiixp alsa_cards_atiixp-modem alsa_cards_bt87x alsa_cards_ca0106 alsa_cards_cmipci alsa_cards_emu10k1x alsa_cards_ens1370 alsa_cards_ens1371 alsa_cards_es1938 alsa_cards_es1968 alsa_cards_fm801 alsa_cards_hda-intel alsa_cards_intel8x0 alsa_cards_intel8x0m alsa_cards_maestro3 alsa_cards_trident alsa_cards_usb-audio alsa_cards_via82xx alsa_cards_via82xx-modem alsa_cards_ymfpci alsa_pcm_plugins_adpcm alsa_pcm_plugins_alaw alsa_pcm_plugins_asym alsa_pcm_plugins_copy alsa_pcm_plugins_dmix alsa_pcm_plugins_dshare alsa_pcm_plugins_dsnoop alsa_pcm_plugins_empty alsa_pcm_plugins_extplug alsa_pcm_plugins_file alsa_pcm_plugins_hooks alsa_pcm_plugins_iec958 alsa_pcm_plugins_ioplug alsa_pcm_plugins_ladspa alsa_pcm_plugins_lfloat alsa_pcm_plugins_linear alsa_pcm_plugins_meter alsa_pcm_plugins_mulaw alsa_pcm_plugins_multi alsa_pcm_plugins_null alsa_pcm_plugins_plug alsa_pcm_plugins_rate alsa_pcm_plugins_route alsa_pcm_plugins_share alsa_pcm_plugins_shm alsa_pcm_plugins_softvol apache2 berkdb bitmap-fonts cli cracklib crypt cups dlloader elibc_glibc fortran gdbm gif gnome gtk2 iconv ipv6 isdnlog jpeg jpeg2k kde kerberos kernel_linux lcd_devices_bayrad lcd_devices_cfontz lcd_devices_cfontz633 lcd_devices_glk lcd_devices_hd44780 lcd_devices_lb216 lcd_devices_lcdm001 lcd_devices_mtxorb lcd_devices_ncurses lcd_devices_text ldap lesstif libg++ linguas_de linguas_es linguas_fr linguas_uk logrotate ncurses nls nptl nptlonly pam pcre perl png ppds pppd python readline reflection sasl session spl ssl tcpd threads tiff truetype-fonts type1-fonts udev unicode userland_GNU xinetd xorg zlib" Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, MAKEOPTS, PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY
It would be all well and shiny _if_ upstream provided a way to do that. There's no way to disable that at the moment, so there's no v4l useflag.