* Using: sun-jdk-1.6
>>> Unpacking source...
>>> Unpacking antlr-2.7.7.tar.gz to /var/tmp/portage/dev-java/antlr-2.7.7/work
 * Applying 2.7.7-gcc-4.3.patch ...
  [ ok ]
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/dev-java/antlr-2.7.7/work/antlr-2.7.7 ...
 * econf: updating antlr-2.7.7/scripts/config.guess with /usr/share/gnuconfig/config.guess
 * econf: updating antlr-2.7.7/scripts/config.sub with /usr/share/gnuconfig/config.sub
./configure --prefix=/usr --host=i686-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --enable-java --enable-python --disable-csharp --disable-debug --disable-examples --enable-cxx --enable-verbose --build=i686-pc-linux-gnu
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking whether this is Cygwin... no
checking whether this is MinGW... no
checking for cygpath... no
checking for /bin/cp... yes
checking for /usr/bin/cp... no
checking for cp... /bin/cp
checking for /bin/echo... yes
checking for /usr/bin/echo... no
checking for echo... /bin/echo
checking for echo... /usr/lib/plan9/bin/echo
checking for /bin/find... no
checking for /usr/bin/find... yes
checking for find... /usr/bin/find
checking for make... /usr/bin/make
checking for gmake... /usr/bin/gmake
checking for gnumake... no
checking for /bin/make... no
checking for /usr/bin/make... yes
checking whether /usr/bin/make is GNU make... yes
checking for make... /usr/bin/make
checking for /opt/sun-jdk-1.6.0.07/bin/java... yes
checking for /opt/sun-jdk-1.6.0.07/bin/javac... yes
checking for fastjar... no
checking for jar... /usr/bin/jar
checking for tlib... no
checking for lib... no
checking for ar... /usr/bin/ar
checking for /usr/bin/ar... yes
checking for i686-pc-linux-gnu-g++... i686-pc-linux-gnu-g++
checking for C++ compiler default output file name... configure: error: C++ compiler cannot create executables
See `config.log' for more details.

!!! Please attach the following file when seeking support:
!!! /var/tmp/portage/dev-java/antlr-2.7.7/work/antlr-2.7.7/config.log
 * 
 * ERROR: dev-java/antlr-2.7.7 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 4142:  Called econf 'src_compile' 'src_compile' '--enable-java' '--enable-python' '--disable-csharp' '--disable-debug' '--disable-examples'
 *               ebuild.sh, line  513:  Called die
 * The specific snippet of code:
 *   			die "econf failed"
 *  The die message:
 *   econf failed
 * 
 * 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/dev-java/antlr-2.7.7/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-java/antlr-2.7.7/temp/environment'.
 * 
!!! When you file a bug report, please include the following information:
GENTOO_VM=sun-jdk-1.6  CLASSPATH="" JAVA_HOME="/opt/sun-jdk-1.6.0.07"
JAVACFLAGS="+ -source 1.3 -target 1.3" COMPILER=""
and of course, the output of emerge --info