On 21 January 2016 at 01:07, acc2 <meinaccountnr2@xxxxxx> wrote: > hi. > i am trying to build gcc 6 (since i want to try out some c++17 features) > and get an error: > > two systems: ubuntu 14.04 LTS > A: as direct system (svn Revision: 232603) > B: in virtual box (svn Revision: 232581) > > directories: > gcc > - srcdir (the svn repo) > - objdir > - installdir > > running: > cd objdir > ../srcdir/configure --prefix=/home/qwer/gcc/installdir/ --enable-threads > --enable-link-mutex --enable-languages=c++ --disable-multilib > make profiledbootstrap > > the failing command: > > on A (using the contrib/download_prerequisites script): > /home/SMBAD/grimm/home/gcc/objdir/./prev-gcc/xg++ > -B/home/SMBAD/grimm/home/gcc/objdir/./prev-gcc/ > -B/home/qwer/gcc/installdir/x86_64-pc-linux-gnu/bin/ -nostdinc++ > -B/home/SMBAD/grimm/home/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs > -B/home/SMBAD/grimm/home/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs > -I/home/SMBAD/grimm/home/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu > -I/home/SMBAD/grimm/home/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include > -I/home/SMBAD/grimm/home/gcc/srcdir/libstdc++-v3/libsupc++ > -L/home/SMBAD/grimm/home/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs > -L/home/SMBAD/grimm/home/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs > -fno-PIE -c -g -O2 -fprofile-use -DIN_GCC -fno-exceptions > -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing > -Wwrite-strings -Wcast-qual -Wmissing-format-attribute > -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros > -Wno-overlength-strings -Werror -fno-common -DHAVE_CONFIG_H -I. -I. > -I../../srcdir/gcc -I../../srcdir/gcc/. -I../../srcdir/gcc/../include > -I../../srcdir/gcc/../libcpp/include > -I/home/SMBAD/grimm/home/gcc/objdir/./gmp > -I/home/SMBAD/grimm/home/gcc/srcdir/gmp > -I/home/SMBAD/grimm/home/gcc/objdir/./mpfr > -I/home/SMBAD/grimm/home/gcc/srcdir/mpfr > -I/home/SMBAD/grimm/home/gcc/srcdir/mpc/src > -I../../srcdir/gcc/../libdecnumber > -I../../srcdir/gcc/../libdecnumber/bid -I../libdecnumber > -I../../srcdir/gcc/../libbacktrace > -I/home/SMBAD/grimm/home/gcc/objdir/./isl/include > -I/home/SMBAD/grimm/home/gcc/srcdir/isl/include -o omp-low.o -MT > omp-low.o -MMD -MP -MF ./.deps/omp-low.TPo ../../srcdir/gcc/omp-low.c > > on B (using packages from the repo): > /home/qwer/gcc/objdir/./prev-gcc/xg++ > -B/home/qwer/gcc/objdir/./prev-gcc/ > -B/home/qwer/gcc/installdir/x86_64-pc-linux-gnu/bin/ -nostdinc++ > -B/home/qwer/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs > -B/home/qwer/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs > -I/home/qwer/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu > -I/home/qwer/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include > -I/home/qwer/gcc/srcdir/libstdc++-v3/libsupc++ > -L/home/qwer/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs > -L/home/qwer/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs > -fno-PIE -c -g -O2 -fprofile-use -DIN_GCC -fno-exceptions > -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing > -Wwrite-strings -Wcast-qual -Wmissing-format-attribute > -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros > -Wno-overlength-strings -Werror -fno-common -DHAVE_CONFIG_H -I. -I. > -I../../srcdir/gcc -I../../srcdir/gcc/. -I../../srcdir/gcc/../include > -I../../srcdir/gcc/../libcpp/include -I../../srcdir/gcc/../libdecnumber > -I../../srcdir/gcc/../libdecnumber/bid -I../libdecnumber > -I../../srcdir/gcc/../libbacktrace -o omp-low.o -MT omp-low.o -MMD -MP > -MF ./.deps/omp-low.TPo ../../srcdir/gcc/omp-low.c > > error (same for both modulo home directory): > ../../srcdir/gcc/omp-low.c: In function ‘void > expand_omp_target(omp_region*)’: > ../../srcdir/gcc/omp-low.c:13345:8: error: ‘i_async’ may be used > uninitialized in this function [-Werror=maybe-uninitialized] > args.safe_push (oacc_launch_pack > ~~~~~~~~~~~~~~~~ > (GOMP_LAUNCH_ASYNC, NULL_TREE, i_async)); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > cc1plus: all warnings being treated as errors > make[3]: *** [omp-low.o] Error 1 > make[3]: *** Waiting for unfinished jobs.... > rm gcov-tool.pod gpl.pod cpp.pod gfdl.pod fsf-funding.pod gcc.pod gcov.pod > make[3]: Leaving directory `/home/qwer/gcc/objdir/gcc' > make[2]: *** [all-stagefeedback-gcc] Error 2 > make[2]: Leaving directory `/home/qwer/gcc/objdir' > make[1]: *** [stagefeedback-bubble] Error 2 > make[1]: Leaving directory `/home/qwer/gcc/objdir' > make: *** [profiledbootstrap] Error 2 > > can someone help and tell me what i am doing wrong? Check if passing --disable-werror option to configure helps. Regards, Prathamesh > > thanks. > raphael.
