On Tue, 31 Jul 2018 at 07:25, martin krastev <blu.dark@xxxxxxxxx> wrote: > > Hello, > > I'm trying to build gcc-7.3.0 (md5 747d5010b7c6938b480bc6e4d7c4be9a of > tar.gz) natively on a MACHTYPE=mipsel-unknown-linux-gnu MIPS p5600 machine > under Debian Stretch. I'm getting an illegal instruction during libstdc++ > build phase: This mailing list is for discussion of GCC development, not help using or building GCC. Your mail would be appropriate on the gcc-help list, which I've CC'd. Please remove gcc@ from further replies and use the gcc-help@ list. > libtool: compile: /home/gru/proj/gcc_build/./gcc/xgcc -shared-libgcc > -B/home/gru/proj/gcc_build/./gcc -nostdinc++ > -L/home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/src > -L/home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/src/.libs > -L/home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/libsupc++/.libs > -B/usr/local/mipsel-linux-gnu/bin/ -B/usr/local/mipsel-linux-gnu/lib/ > -isystem /usr/local/mipsel-linux-gnu/include -isystem > /usr/local/mipsel-linux-gnu/sys-include > -I/home/gru/proj/gcc-7.3.0/libstdc++-v3/../libgcc > -I/home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/include/mipsel-linux-gnu > -I/home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/include > -I/home/gru/proj/gcc-7.3.0/libstdc++-v3/libsupc++ -D_GLIBCXX_SHARED > -std=gnu++14 -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi > -fdiagnostics-show-location=once -ffunction-sections -fdata-sections > -frandom-seed=cow-ops.lo -g -O2 -D_GNU_SOURCE -minterlink-mips16 -c > /home/gru/proj/gcc_build/../gcc-7.3.0/libstdc++-v3/src/filesystem/cow-ops.cc > -fPIC -DPIC -D_GLIBCXX_SHARED -o cow-ops.o > In file included from > /home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/include/vector:64:0, > from > /home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/include/experimental/bits/fs_path.h:39, > from > /home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/include/experimental/filesystem:39, > from > /home/gru/proj/gcc_build/../gcc-7.3.0/libstdc++-v3/src/filesystem/dir.cc:29, > from > /home/gru/proj/gcc_build/../gcc-7.3.0/libstdc++-v3/src/filesystem/cow-dir.cc:26: > /home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/include/bits/stl_vector.h: > In member function 'void std::vector<_Tp, > _Alloc>::_M_move_assign(std::vector<_Tp, _Alloc>&&, std::true_type) [with > _Tp = std::experimental::filesystem::v1::path::_Cmpt; _Alloc = > std::allocator<std::experimental::filesystem::v1::path::_Cmpt>]': > /home/gru/proj/gcc_build/mipsel-linux-gnu/libstdc++-v3/include/bits/stl_vector.h:1531:9: > internal compiler error: Illegal instruction > vector __tmp(get_allocator()); > ^~~~~ > 0x159a473 crash_signal > /home/gru/proj/gcc_build/../gcc-7.3.0/gcc/toplev.c:337 > Please submit a full bug report, > with preprocessed source if appropriate. > Please include the complete backtrace with any bug report. > See <https://gcc.gnu.org/bugs/> for instructions. > Makefile:523: recipe for target 'cow-dir.lo' failed > make[6]: *** [cow-dir.lo] Error 1 > > > I have configured and launched the build as: > > $ CPATH=/usr/include/mipsel-linux-gnu/ > LIBRARY_PATH=/usr/lib/mipsel-linux-gnu/ $PWD/../gcc-7.3.0/configure > --enable-languages=c,c++ --with-float=hard --disable-multiarch > --target=mipsel-linux-gnu > $ CPATH=/usr/include/mipsel-linux-gnu > LIBRARY_PATH=/usr/lib/mipsel-linux-gnu make -j2 > > I've clearly misconfigured the build -- xgcc ended up with a wrong ISA, but > I can't figure out how. What am I missing? The most common reason for SIGILL is that one of the support libraries (gmp, mpfr, or mpc) has been built with the wrong ISA. I wouldn't expect that to fail on that line in libstdc++, but it's worth checking. The simplest way to build those libraries for use with GCC is to put their sources in the GCC source tree, as done by the contrib/download_prerequisites script. See https://gcc.gnu.org/wiki/InstallingGCC for more info.
