Calculating dependencies  \>>> Unpacking source...
>>> Unpacking groff-1.17.2.tar.gz
patching file doc/Makefile
patching file doc/groff.texinfo
>>> Source unpacked.
configure: WARNING: If you wanted to set the --build type, don't use --host.
    If a cross compiler is detected then cross compile mode will be used.
checking for i686-pc-linux-gnu-gcc... gcc-3.1
checking for C compiler default output... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for executable suffix... 
checking for object suffix... o
checking whether we are using the GNU C compiler... yes
checking whether gcc-3.1 accepts -g... yes
checking for i686-pc-linux-gnu-g++... g++-3.1
checking whether we are using the GNU C++ compiler... yes
checking whether g++-3.1 accepts -g... yes
checking that C++ compiler can compile simple program... no
configure: error: a working C++ compiler is required

!!! ERROR: The ebuild did not complete successfully.
!!! Function src_compile, Line 7, Exitcode 1
!!! (no error message)

 ...done!
>>> emerge sys-apps/groff-1.17.2-r2 to /
>>> md5 ;-) groff-1.17.2.tar.gz
!!! emerge aborting on  /usr/portage/sys-apps/groff/groff-1.17.2-r2.ebuild .