emerge -av apache

 * IMPORTANT: 2 news items need reading for repository 'gentoo'.
 * Use eselect news to read news items.


These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] www-servers/apache-2.4.1-r2  USE="ssl threads -debug -doc -ldap (-selinux) -static -suexec" APACHE2_MODULES="actions alias asis* auth_basic auth_digest* authn_alias authn_anon authn_dbd* authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cern_meta* charset_lite* dav dav_fs dav_lock dbd* deflate dir disk_cache dumpio* env expires ext_filter file_cache filter headers ident* imagemap* include info log_config log_forensic* logio mem_cache mime mime_magic negotiation proxy* proxy_ajp* proxy_balancer* proxy_connect* proxy_ftp* proxy_http* rewrite setenvif speling status unique_id userdir usertrack version* vhost_alias -cgi* -cgid* -proxy_scgi -reqtimeout -substitute" APACHE2_MPMS="prefork* -event -itk -peruser -worker" 0 kB

Total: 1 package (1 reinstall), Size of downloads: 0 kB

Would you like to merge these packages? [Yes/No] yes

>>> Verifying ebuild manifests

>>> Emerging (1 of 1) www-servers/apache-2.4.1-r2
 * httpd-2.4.1.tar.bz2 RMD160 SHA1 SHA256 size ;-) ...                   [ ok ]
 * gentoo-apache-2.4.1-20120401.tar.bz2 RMD160 SHA1 SHA256 size ;-) ...  [ ok ]
 *
 * Selected MPM: prefork
 *
 * You have selected a non-threaded MPM but USE=threads is enabled
 * ERROR: www-servers/apache-2.4.1-r2 failed (setup phase):
 *   invalid use flag combination
 *
 * Call stack:
 *         ebuild.sh, line  85:  Called pkg_setup
 *         ebuild.sh, line 319:  Called apache-2_pkg_setup
 *   apache-2.eclass, line 368:  Called setup_mpm
 *   apache-2.eclass, line 143:  Called die
 * The specific snippet of code:
 *              die "invalid use flag combination"
 *
 * If you need support, post the output of 'emerge --info =www-servers/apache-2.4.1-r2',
 * the complete build log and the output of 'emerge -pqv =www-servers/apache-2.4.1-r2'.
 * The complete build log is located at '/var/tmp/portage/www-servers/apache-2.4.1-r2/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/www-servers/apache-2.4.1-r2/temp/die.env'.
 * S: '/var/tmp/portage/www-servers/apache-2.4.1-r2/work/httpd-2.4.1'

>>> Failed to emerge www-servers/apache-2.4.1-r2, Log file:

>>>  '/var/tmp/portage/www-servers/apache-2.4.1-r2/temp/build.log'

 * Messages for package www-servers/apache-2.4.1-r2:

 *
 * Selected MPM: prefork
 *
 * You have selected a non-threaded MPM but USE=threads is enabled
 * ERROR: www-servers/apache-2.4.1-r2 failed (setup phase):
 *   invalid use flag combination
 *
 * Call stack:
 *         ebuild.sh, line  85:  Called pkg_setup
 *         ebuild.sh, line 319:  Called apache-2_pkg_setup
 *   apache-2.eclass, line 368:  Called setup_mpm
 *   apache-2.eclass, line 143:  Called die
 * The specific snippet of code:
 *              die "invalid use flag combination"
 *
 * If you need support, post the output of 'emerge --info =www-servers/apache-2.4.1-r2',
 * the complete build log and the output of 'emerge -pqv =www-servers/apache-2.4.1-r2'.
 * The complete build log is located at '/var/tmp/portage/www-servers/apache-2.4.1-r2/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/www-servers/apache-2.4.1-r2/temp/die.env'.
 * S: '/var/tmp/portage/www-servers/apache-2.4.1-r2/work/httpd-2.4.1'

 * IMPORTANT: 2 news items need reading for repository 'gentoo'.
 * Use eselect news to read news items.