groff failed on x86_64 dockyard-devel (c64.arklinux.org)

groff failed to build on x86_64 for dockyard-devel.
Last 250 lines of build log:

Installing groff-1.19.2-2ark.src.rpm
Building target platforms: x86_64
Building for target x86_64
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.27273
+ umask 022
+ cd /build-groff-x86_64/BUILD
+ cd /build-groff-x86_64/BUILD
+ rm -rf groff-1.19.2
+ /usr/bin/bzip2 -dc /usr/src/ark/SOURCES/groff-1.19.2.tar.bz2
+ tar -xf -
+ STATUS=0
+ '[' 0 -ne 0 ']'
+ cd groff-1.19.2
+ /usr/bin/bzip2 -dc /usr/src/ark/SOURCES/man-pages-ja-GNU_groff-20000115.tar.bz2
+ tar -xf -
+ STATUS=0
+ '[' 0 -ne 0 ']'
++ /usr/bin/id -u
+ '[' 0 = 0 ']'
+ /bin/chown -Rhf root .
++ /usr/bin/id -u
+ '[' 0 = 0 ']'
+ /bin/chgrp -Rhf root .
+ /bin/chmod -Rf a+rX,g-w,o-w .
+ echo 'Patch #0 (groff-1.18-info.patch):'
Patch #0 (groff-1.18-info.patch):
+ patch -p1 -b --suffix .info -s
+ echo 'Patch #1 (groff-1.19.1-nohtml.patch):'
Patch #1 (groff-1.19.1-nohtml.patch):
+ patch -p1 -b --suffix .nohtml -s
+ cp /usr/src/ark/SOURCES/README.A4 .
+ exit 0
Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.28302
+ umask 022
+ cd /build-groff-x86_64/BUILD
+ cd groff-1.19.2
+ CFLAGS='-O2 -fomit-frame-pointer -fweb -frename-registers'
+ export CFLAGS
+ CXXFLAGS='-O2 -fomit-frame-pointer -fweb -frename-registers -fvisibility-inlines-hidden'
+ export CXXFLAGS
+ FFLAGS='-O2 -fomit-frame-pointer -fweb -frename-registers'
+ export FFLAGS
+ '[' 0 = 1 ']'
+ '[' 0 = 1 ']'
+ CROSSCOMPILE='--target=x86_64-ark-linux --host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu'
+ '[' %cross '!=' %cross -a -n %cross ']'
+ export CROSSCOMPILE
+ ./configure --target=x86_64-ark-linux --host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu --program-prefix= --prefix=/usr --exec-prefix=/usr --program-prefix= --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/usr/com --mandir=/usr/share/man --infodir=/usr/share/info --enable-japanese --with-appresdir=/var/tmp/groff-root/usr/share/X11/app-defaults
checking for x86_64-unknown-linux-gnu-gcc... no
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking for x86_64-unknown-linux-gnu-g++... no
checking for x86_64-unknown-linux-gnu-c++... no
checking for x86_64-unknown-linux-gnu-gpp... no
checking for x86_64-unknown-linux-gnu-aCC... no
checking for x86_64-unknown-linux-gnu-CC... no
checking for x86_64-unknown-linux-gnu-cxx... no
checking for x86_64-unknown-linux-gnu-cc++... no
checking for x86_64-unknown-linux-gnu-cl... no
checking for x86_64-unknown-linux-gnu-FCC... no
checking for x86_64-unknown-linux-gnu-KCC... no
checking for x86_64-unknown-linux-gnu-RCC... no
checking for x86_64-unknown-linux-gnu-xlC_r... no
checking for x86_64-unknown-linux-gnu-xlC... no
checking for g++... g++
checking whether we are using the GNU C++ compiler... no
checking whether g++ accepts -g... no
checking that C++ compiler can compile simple program... no
configure: error: a working C++ compiler is required
error: Bad exit status from /var/tmp/rpm-tmp.28302 (%build)


RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.28302 (%build)