On Sun, 5 Jan 2020 at 12:46, Xi Ruoyao wrote: > > On 2020-01-05 12:19 +0000, Winston Smith wrote: > > > Winston Smith schrieb: > > > > Hi All, > > > > > > > > > > > > I've trying to build gcc-9.2.0 on a host with gcc-4.5.1, matching > > > > versions of mpfr, gmp and mpc are symlinked into the top-level of the > > > > tree. > > > > > > > > > > > > This is my configure: > > > > > > > > > > > > $ mkdir build > > > > > > > > $ cd build > > > > > > > > $ ../configure --prefix=/tmp/chroot-gcc/usr/ --enable-bootstrap > > > > --with-glibc-version=2.12 --with-newlib --without-headers --disable-nls > > > > --disable-shared --disable-multilib --disable-decimal-float > > > > --disable-threads --disable-libatomic --disable-libgomp > > > > --disable-libquadmath > > > > --disable-libssp --disable-libvtv --disable-libstdcxx > > > > --enable-languages=c,c++ > > With --disable-libstdcxx you can't bootstrap gcc, because stage 2 gcc has to > link to stage 1 libstdc++. Right. If you just want to build the compiler front-ends without the runtime libs then don't try to do a 3-stage bootstrap, just configure then run 'make all-gcc' to build just the stage1 compilers, and then 'make install-gcc'. If you're trying to build a 3-stage bootstrap of the whole of GCC including runtime libraries, you need to build libstdc++. Maybe it would help if you explain what you're trying to achieve with this configure command.
