When I try to emerge commons-net-1.3.0, I get the following error: compile: [mkdir] Created dir: /var/tmp/portage/commons-net-1.3.0-r1/work/commons-net-1.3.0-src/target/classes [javac] Compiling 143 source files to /var/tmp/portage/commons-net-1.3.0-r1/work/commons-net-1.3.0-src/target/classes [javac] /var/tmp/portage/commons-net-1.3.0-r1/work/commons-net-1.3.0-src/src/java/org/apache/commons/net/ftp/parser/RegexFTPFileEntryParserImpl.java:37: cannot access org.apache.oro.text.regex.MalformedPatternException [javac] bad class file: /var/tmp/portage/commons-net-1.3.0-r1/work/commons-net-1.3.0-src/target/lib/oro.jar(org/apache/oro/text/regex/MalformedPatternException.class) [javac] class file has wrong version 49.0, should be 48.0 [javac] Please remove or make sure it appears in the correct subdirectory of the classpath. [javac] import org.apache.oro.text.regex.MalformedPatternException; [javac] ^ [javac] 1 error BUILD FAILED /var/tmp/portage/commons-net-1.3.0-r1/work/commons-net-1.3.0-src/build.xml:46: Compile failed; see the compiler error output for details. Reproducible: Always Steps to Reproduce: 1. emerge commons-net Actual Results: emerge failed Expected Results: emerge commons-net $ emerge --info Portage 2.0.51.19 (default-linux/x86/2005.0, gcc-3.4.3-20050110, glibc-2.3.5-r0, 2.6.11-gentoo-r5 i686) ================================================================= System uname: 2.6.11-gentoo-r5 i686 Intel(R) Pentium(R) 4 CPU 2.80GHz Gentoo Base System version 1.4.16 Python: dev-lang/python-2.3.4-r1 [2.3.4 (#1, Feb 7 2005, 11:32:26)] distcc 2.16 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled] ccache version 2.3 [enabled] dev-lang/python: 2.3.4-r1 sys-devel/autoconf: 2.59-r6, 2.13 sys-devel/automake: 1.7.9-r1, 1.8.5-r3, 1.5, 1.4_p6, 1.6.3, 1.9.4 sys-devel/binutils: 2.15.92.0.2-r7 sys-devel/libtool: 1.5.14 virtual/os-headers: 2.6.8.1-r1, 2.6.8.1-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-march=pentium4 -O2 -fomit-frame-pointer -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/lib/mozilla/defaults/pref /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=pentium4 -O2 -fomit-frame-pointer -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs autoconfig ccache distlocks fixpackages sandbox sfperms strict userpriv usersandbox" GENTOO_MIRRORS="http://ftp.belnet.be/mirror/rsync.gentoo.org/gentoo/ ftp://ftp.belnet.be/mirror/rsync.gentoo.org/gentoo/" LANG="nl_BE.utf8" LINGUAS="nl" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 X acpi4linux alsa apache2 apm arts audiofile avi bash-completion berkdb bitmap-fonts blender-game bootsplash c++ cddb cdparanoia cdr cdrom clamav clisp codecs crypt css cups curl cvs divx4linux dvd dvdr dvdread emacs emboss encode fam flac foomaticdb fortran gcj gdbm gif gimp gimpprint gkrellm gpm gstreamer gtk gtk2 imagemagick imap imlib imlib2 ipv6 java javadoc javascript jce jp2 jpeg jpeg2k junit kde kdeenablefinal kdexdeltas libg++ libvisual libwww mad maildir mikmod mme mmx mono mozilla moznocompose moznoirc moznomail mp3 mpeg mplayer msn nas ncurses nls no_wxgtk1 nptl nvidia oav ogg oggvorbis opengl pam pdflib perl php png python qt quicktime readline samba sasl sdl slang spell sse ssl subject-rewrite svga tcpd tetex tiff truetype truetype-fonts type1-fonts unicode usb vorbis wmf xine xml2 xprint xv xvid zlib linguas_nl" Unset: ASFLAGS, CBUILD, CTARGET, LC_ALL, LDFLAGS
that's why 1.5 is masked, you cant simply switch back to a 1.4 jdk. recompile everything you've compiled using the jdk1.5...
