Gcc [trunk revision 220696] failed to bootstrap on i686!

["Intel Automatic Testing System [ia32 Core AVX512]" <i32corei7avx512 at ecsmtp dot ims dot intel dot com>]

rm -rf bld
mkdir -p bld
cd bld; \
 PATH="/sbin:/bin:$PATH" CC="gcc -m32" CXX="g++ -m32" ../src-trunk/configure \
	 --prefix=/usr/local --enable-clocale=gnu --with-system-zlib --enable-shared --with-demangler-in-ld --enable-cloog-backend=isl --with-ppl=/opt/gnu --with-cloog=/opt/gnu i686-linux --with-fpmath=sse --enable-languages=c,c++,fortran,java,lto,objc
configure: WARNING: you should use --build, --host, --target
checking build system type... i686-pc-linux-gnu
    grep "Error " makelog.220696.trunk.i686.core-avx512 >> makelog.220696.trunk.i686.core-avx512.mail; \
make[5]: *** [compare] Error 1
make[4]: *** [stage3-bubble] Error 2
make[3]: *** [bootstrap] Error 2
make[2]: *** [bootstrap] Error 2
make[9]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/i686-linux/libstdc++-v3'
make[8]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/i686-linux/libstdc++-v3'
make[7]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/i686-linux/libstdc++-v3'
make[6]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/i686-linux/libstdc++-v3'
make[5]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld'
make "DESTDIR=" "RPATH_ENVVAR=LD_LIBRARY_PATH" "TARGET_SUBDIR=i686-linux" "bindir=/usr/local/bin" "datadir=/usr/local/share" "exec_prefix=/usr/local" "includedir=/usr/local/include" "datarootdir=/usr/local/share" "docdir=/usr/local/share/doc/" "infodir=/usr/local/share/info" "pdfdir=/usr/local/share/doc/" "htmldir=/usr/local/share/doc/" "libdir=/usr/local/lib" "libexecdir=/usr/local/libexec" "lispdir=" "localstatedir=/usr/local/var" "mandir=/usr/local/share/man" "oldincludedir=/usr/include" "prefix=/usr/local" "sbindir=/usr/local/sbin" "sharedstatedir=/usr/local/com" "sysconfdir=/usr/local/etc" "tooldir=/usr/local/i686-linux" "build_tooldir=/usr/local/i686-linux" "target_alias=i686-linux" "AWK=gawk" "BISON=bison" "CC_FOR_BUILD=gcc -m32" "CFLAGS_FOR_BUILD=-g -O2" "CXX_FOR_BUILD=g++ -m32" "EXPECT=expect" "FLEX=flex" "INSTALL=/bin/install -c" "INSTALL_DATA=/bin/install -c -m 644" "INSTALL_PROGRAM=/bin/install -c" "INSTALL_SCRIPT=/bin/install -c" "LDFLAGS_FOR_BUILD=" "LEX=flex" "M4=m4" "MAKE=make" "RUNTEST=runtest" "RUNTESTFLAGS=--target_board='sde-sim' i386.exp=avx512*" "SED=/bin/sed" "SHELL=/bin/sh" "YACC=bison -y" "`echo 'ADAFLAGS=' | sed -e s'/[^=][^=]*=$/XFOO=/'`" "ADA_CFLAGS=" "AR_FLAGS=rc" "`echo 'BOOT_ADAFLAGS=-gnatpg' | sed -e s'/[^=][^=]*=$/XFOO=/'`" "BOOT_CFLAGS=-g -O2" "BOOT_LDFLAGS=" "CFLAGS=-g -O2" "CXXFLAGS=-g -O2" "LDFLAGS=" "LIBCFLAGS=-g -O2" "LIBCXXFLAGS=-g -O2 -fno-implicit-templates" "STAGE1_CHECKING=--enable-checking=yes,types" "STAGE1_LANGUAGES=c,c++,lto" "GNATBIND=no" "GNATMAKE=no" "AR_FOR_TARGET=/usr/local/i686-linux/bin/ar" "AS_FOR_TARGET=/usr/local/i686-linux/bin/as" "CC_FOR_TARGET=/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/./gcc/xgcc -B/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/./gcc/" "CFLAGS_FOR_TARGET=-g -O2" "CPPFLAGS_FOR_TARGET=" "CXXFLAGS_FOR_TARGET=-g -O2 -D_GNU_SOURCE" "DLLTOOL_FOR_TARGET=dlltool" "FLAGS_FOR_TARGET=-B/usr/local/i686-linux/bin/ -B/usr/local/i686-linux/lib/ -isystem /usr/local/i686-linux/include -isystem /usr/local/i686-linux/sys-include" "GCJ_FOR_TARGET=/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/./gcc/gcj -B/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/./gcc/" "GFORTRAN_FOR_TARGET=/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/./gcc/gfortran -B/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld/./gcc/" "GOC_FOR_TARGET=" "GOCFLAGS_FOR_TARGET=-O2 -g" "LD_FOR_TARGET=/usr/local/i686-linux/bin/ld" "LIPO_FOR_TARGET=lipo" "LDFLAGS_FOR_TARGET=" "LIBCFLAGS_FOR_TARGET=-g -O2" "LIBCXXFLAGS_FOR_TARGET=-g -O2 -D_GNU_SOURCE -fno-implicit-templates" "NM_FOR_TARGET=/usr/local/i686-linux/bin/nm" "OBJDUMP_FOR_TARGET=/usr/local/i686-linux/bin/objdump" "OBJCOPY_FOR_TARGET=/usr/local/i686-linux/bin/objcopy" "RANLIB_FOR_TARGET=/usr/local/i686-linux/bin/ranlib" "READELF_FOR_TARGET=/usr/local/i686-linux/bin/readelf" "STRIP_FOR_TARGET=/usr/local/i686-linux/bin/strip" "WINDRES_FOR_TARGET=windres" "WINDMC_FOR_TARGET=windmc" "BUILD_CONFIG=bootstrap-debug" "`echo 'LANGUAGES=' | sed -e s'/[^=][^=]*=$/XFOO=/'`" "LEAN=false" "STAGE1_CFLAGS=-g" "STAGE1_CXXFLAGS=-g" "STAGE1_TFLAGS=" "STAGE2_CFLAGS=-g -O2 -gtoggle" "STAGE2_CXXFLAGS=-g -O2 -gtoggle" "STAGE2_TFLAGS=" "STAGE3_CFLAGS=-g -O2" "STAGE3_CXXFLAGS=-g -O2" "STAGE3_TFLAGS=" "STAGE4_CFLAGS=-g -O2" "STAGE4_CXXFLAGS=-g -O2" "STAGE4_TFLAGS=" "STAGEprofile_CFLAGS=-g -O2 -gtoggle -fprofile-generate" "STAGEprofile_CXXFLAGS=-g -O2 -gtoggle -fprofile-generate" "STAGEprofile_TFLAGS=" "STAGEfeedback_CFLAGS=-g -O2 -fprofile-use" "STAGEfeedback_CXXFLAGS=-g -O2 -fprofile-use" "STAGEfeedback_TFLAGS=" "CXX_FOR_TARGET= $r/./gcc/xg++ -B$r/./gcc/ -nostdinc++ `if test -f $r/i686-linux/libstdc++-v3/scripts/testsuite_flags; then /bin/sh $r/i686-linux/libstdc++-v3/scripts/testsuite_flags --build-includes; else echo -funconfigured-libstdc++-v3 ; fi` -L$r/i686-linux/libstdc++-v3/src -L$r/i686-linux/libstdc++-v3/src/.libs -L$r/i686-linux/libstdc++-v3/libsupc++/.libs" "TFLAGS=" "CONFIG_SHELL=/bin/sh" "MAKEINFO=makeinfo --split-size=5000000 --split-size=5000000"  compare
make[5]: Entering directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld'
make[6]: Entering directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld'
rm -f stage_current
make[6]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld'
Comparing stages 2 and 3
warning: gcc/cc1obj-checksum.o differs
warning: gcc/cc1-checksum.o differs
warning: gcc/cc1plus-checksum.o differs
Bootstrap comparison failure!
gcc/ubsan.o differs
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make[5]: *** [compare] Error 1
make[5]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld'
make[4]: *** [stage3-bubble] Error 2
make[4]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld'
make[3]: *** [bootstrap] Error 2
make[3]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk/bld'
10834.15user 183.66system 1:39:33elapsed 184%CPU (0avgtext+0avgdata 556700maxresident)k
870248inputs+9416552outputs (3056major+112376228minor)pagefaults 0swaps
make[2]: *** [bootstrap] Error 2
make[2]: Leaving directory `/nightly/gcc.svn/test-intel32corei7avx512/gcc-build-trunk'