arning: libexpat.so.0, needed by /usr/lib/libfontconfig.so.1, not found (try using -rpath or -rpath-link)
/usr/lib/libfontconfig.so.1: undefined reference to `XML_ParserCreate'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_GetErrorCode'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_SetUserData'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_SetDoctypeDeclHandler'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_ParseBuffer'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_GetCurrentLineNumber'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_ErrorString'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_ParserFree'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_SetElementHandler'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_GetBuffer'
/usr/lib/libfontconfig.so.1: undefined reference to `XML_SetCharacterDataHandler'
collect2: ld devolvió el estado de salida 1
make: *** [nvidia-settings] Error 1
 *
 * ERROR: media-video/nvidia-settings-169.07 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 2093:  Called die
 * The specific snippet of code:
 *       emake CC="$(tc-getCC)" || die "Failed to build nvidia-settings"
 *  The die message:
 *   Failed to build nvidia-settings
 *
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/media-video/nvidia-settings-169.07/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/media-video/nvidia-settings-169.07/temp/environment'.
 *

 * Messages for package dev-lang/tcl-8.4.18:

 *
 * If you're upgrading from tcl-8.3, you must recompile the other
 * packages on your system that link with tcl after the upgrade
 * completes.  To perform this action, please run revdep-rebuild
 * in package app-portage/gentoolkit.
 * If you have dev-lang/tk and dev-tcltk/tclx installed you should
 * upgrade them before this recompilation, too,
 *

 * Messages for package app-i18n/man-pages-es-1.55-r1:

 *
 * If you want to read these man-pages properly you need to replace
 * the following line in /etc/man.conf:
 *
 * NROFF           /usr/bin/nroff -Tascii -c -mandoc
 *
 * With:
 *
 * NROFF           /usr/bin/groff -Tutf8 -mandoc
 *

 * Messages for package media-video/nvidia-settings-169.07:

 *
 * ERROR: media-video/nvidia-settings-169.07 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 2093:  Called die
 * The specific snippet of code:
 *       emake CC="$(tc-getCC)" || die "Failed to build nvidia-settings"
 *  The die message:
 *   Failed to build nvidia-settings
 *
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/media-video/nvidia-settings-169.07/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/media-video/nvidia-settings-169.07/temp/environment'.