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

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

Installing openvpn-2.0.9-1ark.src.rpm
Building target platforms: x86_64
Building for target x86_64
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.58022
+ umask 022
+ cd /build-openvpn-x86_64/BUILD
+ cd /build-openvpn-x86_64/BUILD
+ rm -rf openvpn-2.0.9
+ tar -xf /usr/src/ark/SOURCES/openvpn-2.0.9.tar.lz
+ cd openvpn-2.0.9
++ /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 .
+ 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
checking for ifconfig... /sbin/ifconfig
checking for ip... /sbin/ip
checking for route... /sbin/route
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking target system type... x86_64-ark-linux
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
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 style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for a BSD-compatible install... /usr/bin/install -c
checking how to run the C preprocessor... /lib/cpp
configure: error: C preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details.
error: Bad exit status from /var/tmp/rpm-tmp.58022 (%prep)


RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.58022 (%prep)