* Package:    sci-mathematics/gwnum-277
 * Repository: gentoo
 * Maintainer: patrick@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux policykit userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Unpacking gwnum-277.tar.bz2 to /var/tmp/portage/sci-mathematics/gwnum-277/work
>>> Source unpacked in /var/tmp/portage/sci-mathematics/gwnum-277/work
>>> Preparing source in /var/tmp/portage/sci-mathematics/gwnum-277/work/gwnum-277 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/sci-mathematics/gwnum-277/work/gwnum-277 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/sci-mathematics/gwnum-277/work/gwnum-277 ...
make -j1 -f make64 
gcc -I.. -DX86_64 -O2 -c cpuid.c
gcc -I.. -DX86_64 -O2 -c gwnum.c
gcc -I.. -DX86_64 -O2 -c gwtables.c
gcc -I.. -DX86_64 -O2 -c gwthread.c
gcc -I.. -DX86_64 -O2 -c gwutil.c
g++ -I.. -I./qd -DX86_64 -O2 -c gwdbldbl.cpp
In file included from ./qd/dd.cc:19,
                 from gwdbldbl.cpp:35:
./qd/dd.h:185:18: error: friend declaration of ‘dd_real polyroot(const dd_real*, int, const dd_real&, double)’ specifies default arguments and isn’t a definition [-fpermissive]
  185 |   friend dd_real polyroot(const dd_real *c, int n,
      |                  ^~~~~~~~
make: *** [make64:27: gwdbldbl.o] Error 1
 * ERROR: sci-mathematics/gwnum-277::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=sci-mathematics/gwnum-277::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=sci-mathematics/gwnum-277::gentoo'`.
 * The complete build log is located at '/var/log/portage/sci-mathematics:gwnum-277:20190512-133830.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/sci-mathematics/gwnum-277/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sci-mathematics/gwnum-277/temp/environment'.
 * Working directory: '/var/tmp/portage/sci-mathematics/gwnum-277/work/gwnum-277'
 * S: '/var/tmp/portage/sci-mathematics/gwnum-277/work/gwnum-277'