[Bug regression/95733] New: Building on PowerPC 64 Tests Fail With GCC 11

[xerofoify at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95733

            Bug ID: 95733
           Summary: Building on PowerPC 64 Tests Fail With GCC 11
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: regression
          Assignee: unassigned at gcc dot gnu.org
          Reporter: xerofoify at gmail dot com
  Target Milestone: ---

After building gcc as such:
../gcc/configure --enable-lanuages=c,c++ --enable-threads -disable-multilibs
--enable-checking=yes --prefix=/home/xerofoify/obdjir

it fails on running tests with make -k check with:
                === libgomp Summary ===

# of expected passes            7764
# of expected failures          4
# of unsupported tests          573
make[4]: Leaving directory
`/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/libgomp/testsuite'
make[3]: Leaving directory
`/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/libgomp/testsuite'
make[3]: Entering directory
`/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/libgomp'
:
:
:
make  DO=all multi-do # make
make[4]: Entering directory
`/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/libgomp'
if [ -z "" ]; then \
  true; \
else \
  rootpre=`${PWDCMD-pwd}`/; export rootpre; \
  srcrootpre=`cd ../../../gcc/libgomp; ${PWDCMD-pwd}`/; export srcrootpre; \
  lib=`echo "${rootpre}" | sed -e 's,^.*/\([^/][^/]*\)/$,\1,'`; \
  compiler="/home/xerofoify/obdjir/./gcc/xgcc -B/home/xerofoify/obdjir/./gcc/
-B/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/bin/
-B/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/lib/ -isystem
/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/include -isystem
/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/sys-include   "; \
  for i in `${compiler} --print-multi-lib 2>/dev/null`; do \
    dir=`echo $i | sed -e 's/;.*$//'`; \
    if [ "${dir}" = "." ]; then \
      true; \
    else \
      if [ -d ../${dir}/${lib} ]; then \
        flags=`echo $i | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; \
        if (cd ../${dir}/${lib}; make  \
                        CFLAGS="-g -O2 ${flags}" \
                        CCASFLAGS=" ${flags}" \
                        FCFLAGS="-L. -Wall -L../libgfortran  ${flags}" \
                        FFLAGS=" ${flags}" \
                        ADAFLAGS=" ${flags}" \
                        prefix="/home/xerofoify/obdjir" \
                        exec_prefix="/home/xerofoify/obdjir" \
                        GOCFLAGS="-O2 -g ${flags}" \
                        GDCFLAGS="-O2 -g ${flags}" \
                        CXXFLAGS="-g -O2 -D_GNU_SOURCE ${flags}" \
                        LIBCFLAGS="-g -O2 ${flags}" \
                        LIBCXXFLAGS="-g -O2 -D_GNU_SOURCE
-fno-implicit-templates ${flags}" \
                        LDFLAGS=" ${flags}" \
                        MULTIFLAGS="${flags}" \
                        DESTDIR="" \
                        INSTALL="/usr/bin/install -c" \
                        INSTALL_DATA="/usr/bin/install -c -m 644" \
                        INSTALL_PROGRAM="/usr/bin/install -c" \
                        INSTALL_SCRIPT="/usr/bin/install -c" \
                        all); then \
          true; \
        else \
          exit 1; \
        fi; \
      else true; \
      fi; \
    fi; \
  done; \
fi
make[4]: Leaving directory
`/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/libgomp'
make[3]: Leaving directory
`/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/libgomp'
make[2]: Leaving directory
`/home/xerofoify/obdjir/powerpc64le-unknown-linux-gnu/libgomp'
make[1]: Leaving directory `/home/xerofoify/obdjir'
make: *** [do-check] Error 2
make: Target `check' not remade because of errors.
[xerofoify@gcc2-power8 obdjir]$ cd bin
[xerofoify@gcc2-power8 bin]$ ./g++ -v
Using built-in specs.
COLLECT_GCC=./g++
COLLECT_LTO_WRAPPER=/home/xerofoify/obdjir/libexec/gcc/powerpc64le-unknown-linux-gnu/11.0.0/lto-wrapper
Target: powerpc64le-unknown-linux-gnu
Configured with: ../gcc/configure --enable-lanuages=c,c++ --enable-threads
-disable-multilibs --enable-checking=yes --prefix=/home/xerofoify/obdjir
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.0.0 20200613 (experimental) (GCC) 

OpenMP should be enabled by default with C++ and therefore this seems to be a
regression.