Gcc [trunk revision 242994] failed to bootstrap on x86_64!

[hjl@gnu-skl-1.localdomain (H.J. Lu)]

cd bld; \
 RUNTESTFLAGS="--target_board='unix{-m32,}'" ../src-trunk/configure \
	 --prefix=/usr/7.0.0 --enable-clocale=gnu --with-system-zlib --enable-shared --with-demangler-in-ld --enable-libmpx --with-build-config='bootstrap-O3 bootstrap-debug' --disable-werror --with-fpmath=sse 
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... x86_64-pc-linux-gnu
checking for a BSD-compatible install... /bin/install -c
    grep "Error " makelog.242994.trunk.x86_64.O3 >> makelog.242994.trunk.x86_64.O3.mail; \
make[4]: *** [configure-target-libobjc] Error 1
make[3]: *** [bootstrap] Error 2
make[2]: *** [bootstrap] Error 2
4
checking for clock_getres... no
checking for the word size... yes
checking for clock_gettime... 4
config.status: executing libtool commands
yes
checking for clock_settime... checking whether the target supports hidden visibility... yes
checking whether the target supports dllexport... yes
checking for shm_open in -lrt... no
checking whether the target supports symbol aliases... yes
checking for dlsym in -ldl... yes
checking whether the target supports the ifunc attribute... yes
checking for clock_gettime in -lrt... yes
checking for ld used by /export/gnu/import/git/gcc-test/bld/./gcc/xgcc -B/export/gnu/import/git/gcc-test/bld/./gcc/ -B/usr/7.0.0/x86_64-pc-linux-gnu/bin/ -B/usr/7.0.0/x86_64-pc-linux-gnu/lib/ -isystem /usr/7.0.0/x86_64-pc-linux-gnu/include -isystem /usr/7.0.0/x86_64-pc-linux-gnu/sys-include  -m32... (cached) /export/gnu/import/git/gcc-test/bld/./gcc/collect-ld
checking if the linker (/export/gnu/import/git/gcc-test/bld/./gcc/collect-ld) is GNU ld... (cached) yes
checking for shared libgcc... yes
checking for necessary platform features... yes
checking __sync extensions... yes
checking __atomic extensions... yes
checking output filetype... yes
configure: versioning on shared library symbols is gnu
configure: updating cache ./config.cache
elf32
looking for a compliant stdint.h in stdint.h, checking for uintmax_t... configure: creating ./config.status
yes
checking for uintptr_t... yes
checking for int_least32_t... yes
checking for int_fast32_t... yes
checking for uint64_t... yes
checking what to include in gstdint.h... stdint.h (already complete)
checking sys/mman.h usability... yes
checking sys/mman.h presence... yes
checking for sys/mman.h... yes
checking alloca.h usability... yes
checking alloca.h presence... yes
checking for alloca.h... yes
config.status: creating Makefile
checking link.h usability... config.status: creating testsuite/Makefile
config.status: creating auto-config.h
config.status: executing default-1 commands
yes
checking link.h presence... yes
checking for link.h... yes
Adding multilib support to Makefile in ../../../../src-trunk/libatomic
with_multisubdir=32
checking whether strnlen is declared... config.status: executing depfiles commands
yes
checking rpc/xdr.h usability... config.status: executing libtool commands
config.status: executing gstdint.h commands
yes
checking rpc/xdr.h presence... config.status: executing depfiles commands
yes
checking for rpc/xdr.h... yes
checking tirpc/rpc/xdr.h usability... config.status: executing libtool commands
no
checking tirpc/rpc/xdr.h presence... config.status: executing gstdint.h commands
no
checking for tirpc/rpc/xdr.h... no
configure: updating cache ./config.cache
configure: creating ./config.status
config.status: creating Makefile
config.status: creating libsanitizer.spec
config.status: creating libbacktrace/backtrace-supported.h
config.status: creating interception/Makefile
Adding multilib support to interception/Makefile in ../../../../src-trunk/libsanitizer
with_multisubdir=32
config.status: creating sanitizer_common/Makefile
Adding multilib support to sanitizer_common/Makefile in ../../../../src-trunk/libsanitizer
with_multisubdir=32
config.status: creating libbacktrace/Makefile
Adding multilib support to libbacktrace/Makefile in ../../../../src-trunk/libsanitizer
with_multisubdir=32
config.status: creating lsan/Makefile
Adding multilib support to lsan/Makefile in ../../../../src-trunk/libsanitizer
with_multisubdir=32
config.status: creating asan/Makefile
Adding multilib support to asan/Makefile in ../../../../src-trunk/libsanitizer
with_multisubdir=32
config.status: creating ubsan/Makefile
Adding multilib support to ubsan/Makefile in ../../../../src-trunk/libsanitizer
with_multisubdir=32
config.status: creating config.h
config.status: executing default-1 commands
Adding multilib support to Makefile in ../../../../src-trunk/libsanitizer
with_multisubdir=32
config.status: executing depfiles commands
config.status: executing libtool commands
config.status: executing gstdint.h commands
config.status: executing depfiles commands
config.status: executing libtool commands
config.status: executing gstdint.h commands
make[4]: Leaving directory '/export/gnu/import/git/gcc-test/bld'
Makefile:23809: recipe for target 'bootstrap' failed
make[3]: *** [bootstrap] Error 2
make[3]: Leaving directory '/export/gnu/import/git/gcc-test/bld'
12538.85user 289.01system 35:24.21elapsed 603%CPU (0avgtext+0avgdata 558584maxresident)k
224inputs+21754496outputs (1major+126550471minor)pagefaults 0swaps
Makefile:294: recipe for target 'bootstrap' failed
make[2]: *** [bootstrap] Error 2
make[2]: Leaving directory '/export/gnu/import/git/gcc-test'