.libs/compatibility.o: In function `std::basic_istream<char, std::char_traits<ch ar> >::ignore(long)': /cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/cyg64/x86_64-unknown-cygwin/libstdc++ -v3/src/../../../../libstdc++-v3/src/c++98/compatibility.cc:67: undefined refere nce to `std::basic_istream<char, std::char_traits<char> >::sentry::sentry(std::b asic_istream<char, std::char_traits<char> >&, bool)' $ gcc/xg++ -v Using built-in specs. COLLECT_GCC=gcc/xg++ Target: x86_64-unknown-cygwin Configured with: ../configure --prefix=/usr/local/gcc6.0 --enable-languages='c c ++ fortran' --enable-libgomp --enable-threads=posix --with-dwarf2 --without-libi conv-prefix --without-libintl-prefix --with-system-zlib --disable-werror --witho ut-cloog --without-isl Thread model: posix gcc version 6.0.0 20160113 (experimental) (GCC) -- Tim Prince
