[Bug bootstrap/82686] New: Debian sid powerpc64-unknown-linux-gnu 4.13.0-1-powerpc64 bootstrap breaks in stage3 with unexpected requirement for bdw-gc

["dclarke at blastwave dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82686

            Bug ID: 82686
           Summary: Debian sid powerpc64-unknown-linux-gnu
                    4.13.0-1-powerpc64 bootstrap breaks in stage3 with
                    unexpected requirement for bdw-gc
           Product: gcc
           Version: 7.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dclarke at blastwave dot org
  Target Milestone: ---

Late in stage 3 of a perfect looking bootstrap I see : 

[after many hours]
libtool: link:
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include  -m32 -shared  -fPIC
-DPIC  .libs/bounds.o .libs/compile_options.o .libs/memory.o .libs/string.o
.libs/select.o .libs/backtrace.o .libs/convert_char.o .libs/environ.o
.libs/error.o .libs/fpu.o .libs/main.o .libs/pause.o .libs/stop.o
.libs/all_l1.o .libs/all_l2.o .libs/all_l4.o .libs/all_l8.o .libs/all_l16.o
.libs/any_l1.o .libs/any_l2.o .libs/any_l4.o .libs/any_l8.o .libs/any_l16.o
.libs/count_1_l.o .libs/count_2_l.o .libs/count_4_l.o .libs/count_8_l.o
.libs/count_16_l.o .libs/maxloc0_4_i1.o .libs/maxloc0_8_i1.o
.libs/maxloc0_16_i1.o .libs/maxloc0_4_i2.o .libs/maxloc0_8_i2.o
.libs/maxloc0_16_i2.o .libs/maxloc0_4_i4.o .libs/maxloc0_8_i4.o
.libs/maxloc0_16_i4.o .libs/maxloc0_4_i8.o .libs/maxloc0_8_i8.o
.libs/maxloc0_16_i8.o .libs/maxloc0_4_i16.o .libs/maxloc0_8_i16.o
.libs/maxloc0_16_i16.o .libs/maxloc0_4_r4.o .libs/maxloc0_8_r4.o
.libs/maxloc0_16_r4.o .libs/maxloc0_4_r8.o .libs/maxloc0_8_r8.o
.libs/maxloc0_16_r8.o .libs/maxloc0_4_r10.o .libs/maxloc0_8_r10.o
.libs/maxloc0_16_r10.o .libs/maxloc0_4_r16.o .libs/maxloc0_8_r16.o
.libs/maxloc0_16_r16.o .libs/maxloc1_4_i1.o .libs/maxloc1_8_i1.o
.libs/maxloc1_16_i1.o .libs/maxloc1_4_i2.o .libs/maxloc1_8_i2.o
.libs/maxloc1_16_i2.o .libs/maxloc1_4_i4.o .libs/maxloc1_8_i4.o
.libs/maxloc1_16_i4.o .libs/maxloc1_4_i8.o .libs/maxloc1_8_i8.o
.libs/maxloc1_16_i8.o .libs/maxloc1_4_i16.o .libs/maxloc1_8_i16.o
.libs/maxloc1_16_i16.o .libs/maxloc1_4_r4.o .libs/maxloc1_8_r4.o
.libs/maxloc1_16_r4.o .libs/maxloc1_4_r8.o .libs/maxloc1_8_r8.o
.libs/maxloc1_16_r8.o .libs/maxloc1_4_r10.o .libs/maxloc1_8_r10.o
.libs/maxloc1_16_r10.o .libs/maxloc1_4_r16.o .libs/maxloc1_8_r16.o
.libs/maxloc1_16_r16.o .libs/maxval_i1.o .libs/maxval_i2.o .libs/maxval_i4.o
.libs/maxval_i8.o .libs/maxval_i16.o .libs/maxval_r4.o .libs/maxval_r8.o
.libs/maxval_r10.o .libs/maxval_r16.o .libs/minloc0_4_i1.o .libs/minloc0_8_i1.o
.libs/minloc0_16_i1.o .libs/minloc0_4_i2.o .libs/minloc0_8_i2.o
.libs/minloc0_16_i2.o .libs/minloc0_4_i4.o .libs/minloc0_8_i4.o
.libs/minloc0_16_i4.o .libs/minloc0_4_i8.o .libs/minloc0_8_i8.o
.libs/minloc0_16_i8.o .libs/minloc0_4_i16.o .libs/minloc0_8_i16.o
.libs/minloc0_16_i16.o .libs/minloc0_4_r4.o .libs/minloc0_8_r4.o
.libs/minloc0_16_r4.o .libs/minloc0_4_r8.o .libs/minloc0_8_r8.o
.libs/minloc0_16_r8.o .libs/minloc0_4_r10.o .libs/minloc0_8_r10.o
.libs/minloc0_16_r10.o .libs/minloc0_4_r16.o .libs/minloc0_8_r16.o
.libs/minloc0_16_r16.o .libs/minloc1_4_i1.o .libs/minloc1_8_i1.o
.libs/minloc1_16_i1.o .libs/minloc1_4_i2.o .libs/minloc1_8_i2.o
.libs/minloc1_16_i2.o .libs/minloc1_4_i4.o .libs/minloc1_8_i4.o
.libs/minloc1_16_i4.o .libs/minloc1_4_i8.o .libs/minloc1_8_i8.o
.libs/minloc1_16_i8.o .libs/minloc1_4_i16.o .libs/minloc1_8_i16.o
.libs/minloc1_16_i16.o .libs/minloc1_4_r4.o .libs/minloc1_8_r4.o
.libs/minloc1_16_r4.o .libs/minloc1_4_r8.o .libs/minloc1_8_r8.o
.libs/minloc1_16_r8.o .libs/minloc1_4_r10.o .libs/minloc1_8_r10.o
.libs/minloc1_16_r10.o .libs/minloc1_4_r16.o .libs/minloc1_8_r16.o
.libs/minloc1_16_r16.o .libs/minval_i1.o .libs/minval_i2.o .libs/minval_i4.o
.libs/minval_i8.o .libs/minval_i16.o .libs/minval_r4.o .libs/minval_r8.o
.libs/minval_r10.o .libs/minval_r16.o .libs/product_i1.o .libs/product_i2.o
.libs/product_i4.o .libs/product_i8.o .libs/product_i16.o .libs/product_r4.o
.libs/product_r8.o .libs/product_r10.o .libs/product_r16.o .libs/product_c4.o
.libs/product_c8.o .libs/product_c10.o .libs/product_c16.o .libs/sum_i1.o
.libs/sum_i2.o .libs/sum_i4.o .libs/sum_i8.o .libs/sum_i16.o .libs/sum_r4.o
.libs/sum_r8.o .libs/sum_r10.o .libs/sum_r16.o .libs/sum_c4.o .libs/sum_c8.o
.libs/sum_c10.o .libs/sum_c16.o .libs/bessel_r4.o .libs/bessel_r8.o
.libs/bessel_r10.o .libs/bessel_r16.o .libs/iall_i1.o .libs/iall_i2.o
.libs/iall_i4.o .libs/iall_i8.o .libs/iall_i16.o .libs/iany_i1.o
.libs/iany_i2.o .libs/iany_i4.o .libs/iany_i8.o .libs/iany_i16.o
.libs/iparity_i1.o .libs/iparity_i2.o .libs/iparity_i4.o .libs/iparity_i8.o
.libs/iparity_i16.o .libs/norm2_r4.o .libs/norm2_r8.o .libs/norm2_r10.o
.libs/norm2_r16.o .libs/parity_l1.o .libs/parity_l2.o .libs/parity_l4.o
.libs/parity_l8.o .libs/parity_l16.o .libs/matmul_i1.o .libs/matmul_i2.o
.libs/matmul_i4.o .libs/matmul_i8.o .libs/matmul_i16.o .libs/matmul_r4.o
.libs/matmul_r8.o .libs/matmul_r10.o .libs/matmul_r16.o .libs/matmul_c4.o
.libs/matmul_c8.o .libs/matmul_c10.o .libs/matmul_c16.o .libs/matmul_l4.o
.libs/matmul_l8.o .libs/matmul_l16.o .libs/shape_i1.o .libs/shape_i2.o
.libs/shape_i4.o .libs/shape_i8.o .libs/shape_i16.o .libs/eoshift1_4.o
.libs/eoshift1_8.o .libs/eoshift1_16.o .libs/eoshift3_4.o .libs/eoshift3_8.o
.libs/eoshift3_16.o .libs/cshift1_4.o .libs/cshift1_8.o .libs/cshift1_16.o
.libs/reshape_i4.o .libs/reshape_i8.o .libs/reshape_i16.o .libs/reshape_r4.o
.libs/reshape_r8.o .libs/reshape_r10.o .libs/reshape_r16.o .libs/reshape_c4.o
.libs/reshape_c8.o .libs/reshape_c10.o .libs/reshape_c16.o .libs/in_pack_i1.o
.libs/in_pack_i2.o .libs/in_pack_i4.o .libs/in_pack_i8.o .libs/in_pack_i16.o
.libs/in_pack_r4.o .libs/in_pack_r8.o .libs/in_pack_r10.o .libs/in_pack_r16.o
.libs/in_pack_c4.o .libs/in_pack_c8.o .libs/in_pack_c10.o .libs/in_pack_c16.o
.libs/in_unpack_i1.o .libs/in_unpack_i2.o .libs/in_unpack_i4.o
.libs/in_unpack_i8.o .libs/in_unpack_i16.o .libs/in_unpack_r4.o
.libs/in_unpack_r8.o .libs/in_unpack_r10.o .libs/in_unpack_r16.o
.libs/in_unpack_c4.o .libs/in_unpack_c8.o .libs/in_unpack_c10.o
.libs/in_unpack_c16.o .libs/pow_i4_i4.o .libs/pow_i8_i4.o .libs/pow_i16_i4.o
.libs/pow_r16_i4.o .libs/pow_c4_i4.o .libs/pow_c8_i4.o .libs/pow_c10_i4.o
.libs/pow_c16_i4.o .libs/pow_i4_i8.o .libs/pow_i8_i8.o .libs/pow_i16_i8.o
.libs/pow_r4_i8.o .libs/pow_r8_i8.o .libs/pow_r10_i8.o .libs/pow_r16_i8.o
.libs/pow_c4_i8.o .libs/pow_c8_i8.o .libs/pow_c10_i8.o .libs/pow_c16_i8.o
.libs/pow_i4_i16.o .libs/pow_i8_i16.o .libs/pow_i16_i16.o .libs/pow_r4_i16.o
.libs/pow_r8_i16.o .libs/pow_r10_i16.o .libs/pow_r16_i16.o .libs/pow_c4_i16.o
.libs/pow_c8_i16.o .libs/pow_c10_i16.o .libs/pow_c16_i16.o .libs/pack_i1.o
.libs/pack_i2.o .libs/pack_i4.o .libs/pack_i8.o .libs/pack_i16.o
.libs/pack_r4.o .libs/pack_r8.o .libs/pack_r10.o .libs/pack_r16.o
.libs/pack_c4.o .libs/pack_c8.o .libs/pack_c10.o .libs/pack_c16.o
.libs/unpack_i1.o .libs/unpack_i2.o .libs/unpack_i4.o .libs/unpack_i8.o
.libs/unpack_i16.o .libs/unpack_r4.o .libs/unpack_r8.o .libs/unpack_r10.o
.libs/unpack_r16.o .libs/unpack_c4.o .libs/unpack_c8.o .libs/unpack_c10.o
.libs/unpack_c16.o .libs/spread_i1.o .libs/spread_i2.o .libs/spread_i4.o
.libs/spread_i8.o .libs/spread_i16.o .libs/spread_r4.o .libs/spread_r8.o
.libs/spread_r10.o .libs/spread_r16.o .libs/spread_c4.o .libs/spread_c8.o
.libs/spread_c10.o .libs/spread_c16.o .libs/cshift0_i1.o .libs/cshift0_i2.o
.libs/cshift0_i4.o .libs/cshift0_i8.o .libs/cshift0_i16.o .libs/cshift0_r4.o
.libs/cshift0_r8.o .libs/cshift0_r10.o .libs/cshift0_r16.o .libs/cshift0_c4.o
.libs/cshift0_c8.o .libs/cshift0_c10.o .libs/cshift0_c16.o
.libs/size_from_kind.o .libs/close.o .libs/file_pos.o .libs/format.o
.libs/inquire.o .libs/intrinsics.o .libs/list_read.o .libs/lock.o .libs/open.o
.libs/read.o .libs/transfer.o .libs/transfer128.o .libs/unit.o .libs/unix.o
.libs/write.o .libs/fbuf.o .libs/associated.o .libs/abort.o .libs/args.o
.libs/cshift0.o .libs/eoshift0.o .libs/eoshift2.o .libs/erfc_scaled.o
.libs/extends_type_of.o .libs/fnum.o .libs/ierrno.o .libs/ishftc.o
.libs/mvbits.o .libs/move_alloc.o .libs/pack_generic.o
.libs/selected_char_kind.o .libs/size.o .libs/spread_generic.o
.libs/string_intrinsics.o .libs/rand.o .libs/random.o .libs/reshape_generic.o
.libs/reshape_packed.o .libs/selected_int_kind.o .libs/selected_real_kind.o
.libs/unpack_generic.o .libs/in_pack_generic.o .libs/in_unpack_generic.o
.libs/access.o .libs/c99_functions.o .libs/chdir.o .libs/chmod.o .libs/clock.o
.libs/cpu_time.o .libs/ctime.o .libs/date_and_time.o .libs/dtime.o .libs/env.o
.libs/etime.o .libs/execute_command_line.o .libs/exit.o .libs/gerror.o
.libs/getcwd.o .libs/getlog.o .libs/getXid.o .libs/hostnm.o .libs/kill.o
.libs/link.o .libs/perror.o .libs/signal.o .libs/sleep.o .libs/system.o
.libs/rename.o .libs/stat.o .libs/symlnk.o .libs/system_clock.o .libs/time.o
.libs/umask.o .libs/unlink.o .libs/ieee_helper.o .libs/ieee_arithmetic.o
.libs/ieee_exceptions.o .libs/ieee_features.o .libs/_abs_c4.o .libs/_abs_c8.o
.libs/_abs_c10.o .libs/_abs_c16.o .libs/_abs_i4.o .libs/_abs_i8.o
.libs/_abs_i16.o .libs/_abs_r4.o .libs/_abs_r8.o .libs/_abs_r10.o
.libs/_abs_r16.o .libs/_aimag_c4.o .libs/_aimag_c8.o .libs/_aimag_c10.o
.libs/_aimag_c16.o .libs/_exp_r4.o .libs/_exp_r8.o .libs/_exp_r10.o
.libs/_exp_r16.o .libs/_exp_c4.o .libs/_exp_c8.o .libs/_exp_c10.o
.libs/_exp_c16.o .libs/_log_r4.o .libs/_log_r8.o .libs/_log_r10.o
.libs/_log_r16.o .libs/_log_c4.o .libs/_log_c8.o .libs/_log_c10.o
.libs/_log_c16.o .libs/_log10_r4.o .libs/_log10_r8.o .libs/_log10_r10.o
.libs/_log10_r16.o .libs/_sqrt_r4.o .libs/_sqrt_r8.o .libs/_sqrt_r10.o
.libs/_sqrt_r16.o .libs/_sqrt_c4.o .libs/_sqrt_c8.o .libs/_sqrt_c10.o
.libs/_sqrt_c16.o .libs/_asin_r4.o .libs/_asin_r8.o .libs/_asin_r10.o
.libs/_asin_r16.o .libs/_asinh_r4.o .libs/_asinh_r8.o .libs/_asinh_r10.o
.libs/_asinh_r16.o .libs/_acos_r4.o .libs/_acos_r8.o .libs/_acos_r10.o
.libs/_acos_r16.o .libs/_acosh_r4.o .libs/_acosh_r8.o .libs/_acosh_r10.o
.libs/_acosh_r16.o .libs/_atan_r4.o .libs/_atan_r8.o .libs/_atan_r10.o
.libs/_atan_r16.o .libs/_atanh_r4.o .libs/_atanh_r8.o .libs/_atanh_r10.o
.libs/_atanh_r16.o .libs/_sin_r4.o .libs/_sin_r8.o .libs/_sin_r10.o
.libs/_sin_r16.o .libs/_sin_c4.o .libs/_sin_c8.o .libs/_sin_c10.o
.libs/_sin_c16.o .libs/_cos_r4.o .libs/_cos_r8.o .libs/_cos_r10.o
.libs/_cos_r16.o .libs/_cos_c4.o .libs/_cos_c8.o .libs/_cos_c10.o
.libs/_cos_c16.o .libs/_tan_r4.o .libs/_tan_r8.o .libs/_tan_r10.o
.libs/_tan_r16.o .libs/_sinh_r4.o .libs/_sinh_r8.o .libs/_sinh_r10.o
.libs/_sinh_r16.o .libs/_cosh_r4.o .libs/_cosh_r8.o .libs/_cosh_r10.o
.libs/_cosh_r16.o .libs/_tanh_r4.o .libs/_tanh_r8.o .libs/_tanh_r10.o
.libs/_tanh_r16.o .libs/_conjg_c4.o .libs/_conjg_c8.o .libs/_conjg_c10.o
.libs/_conjg_c16.o .libs/_aint_r4.o .libs/_aint_r8.o .libs/_aint_r10.o
.libs/_aint_r16.o .libs/_anint_r4.o .libs/_anint_r8.o .libs/_anint_r10.o
.libs/_anint_r16.o .libs/_sign_i4.o .libs/_sign_i8.o .libs/_sign_i16.o
.libs/_sign_r4.o .libs/_sign_r8.o .libs/_sign_r10.o .libs/_sign_r16.o
.libs/_dim_i4.o .libs/_dim_i8.o .libs/_dim_i16.o .libs/_dim_r4.o
.libs/_dim_r8.o .libs/_dim_r10.o .libs/_dim_r16.o .libs/_atan2_r4.o
.libs/_atan2_r8.o .libs/_atan2_r10.o .libs/_atan2_r16.o .libs/_mod_i4.o
.libs/_mod_i8.o .libs/_mod_i16.o .libs/_mod_r4.o .libs/_mod_r8.o
.libs/_mod_r10.o .libs/_mod_r16.o .libs/misc_specifics.o .libs/dprod_r8.o
.libs/f2c_specifics.o  -Wl,--whole-archive ../libbacktrace/.libs/libbacktrace.a
-Wl,--no-whole-archive  -lm  -m32 -m32 -m32
-Wl,--version-script=../../../../gcc-7.2.0/libgfortran/gfortran.map
-shared-libgcc   -Wl,-soname -Wl,libgfortran.so.4 -o .libs/libgfortran.so.4.0.0
libtool: link: (cd ".libs" && rm -f "libgfortran.so.4" && ln -s
"libgfortran.so.4.0.0" "libgfortran.so.4")
libtool: link: (cd ".libs" && rm -f "libgfortran.so" && ln -s
"libgfortran.so.4.0.0" "libgfortran.so")
libtool: link: (cd .libs/libgfortran.lax/libbacktrace.a && /usr/local/bin/ar x
"/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/powerpc64-unknown-linux-gnu/32/libgfortran/../libbacktrace/.libs/libbacktrace.a")
copying selected object files to avoid basename conflicts...
libtool: link: ln .libs/libgfortran.lax/libbacktrace.a/backtrace.o
.libs/libgfortran.lax/lt1-backtrace.o || cp
.libs/libgfortran.lax/libbacktrace.a/backtrace.o
.libs/libgfortran.lax/lt1-backtrace.o
libtool: link: /usr/local/bin/ar rc .libs/libgfortran.a bounds.o
compile_options.o memory.o string.o select.o backtrace.o convert_char.o
environ.o error.o fpu.o main.o pause.o stop.o all_l1.o all_l2.o all_l4.o
all_l8.o all_l16.o any_l1.o any_l2.o any_l4.o any_l8.o any_l16.o count_1_l.o
count_2_l.o count_4_l.o count_8_l.o count_16_l.o maxloc0_4_i1.o maxloc0_8_i1.o
maxloc0_16_i1.o maxloc0_4_i2.o maxloc0_8_i2.o maxloc0_16_i2.o maxloc0_4_i4.o
maxloc0_8_i4.o maxloc0_16_i4.o maxloc0_4_i8.o maxloc0_8_i8.o maxloc0_16_i8.o
maxloc0_4_i16.o maxloc0_8_i16.o maxloc0_16_i16.o maxloc0_4_r4.o maxloc0_8_r4.o
maxloc0_16_r4.o maxloc0_4_r8.o maxloc0_8_r8.o maxloc0_16_r8.o maxloc0_4_r10.o
maxloc0_8_r10.o maxloc0_16_r10.o maxloc0_4_r16.o maxloc0_8_r16.o
maxloc0_16_r16.o maxloc1_4_i1.o maxloc1_8_i1.o maxloc1_16_i1.o maxloc1_4_i2.o
maxloc1_8_i2.o maxloc1_16_i2.o maxloc1_4_i4.o maxloc1_8_i4.o maxloc1_16_i4.o
maxloc1_4_i8.o maxloc1_8_i8.o maxloc1_16_i8.o maxloc1_4_i16.o maxloc1_8_i16.o
maxloc1_16_i16.o maxloc1_4_r4.o maxloc1_8_r4.o maxloc1_16_r4.o maxloc1_4_r8.o
maxloc1_8_r8.o maxloc1_16_r8.o maxloc1_4_r10.o maxloc1_8_r10.o maxloc1_16_r10.o
maxloc1_4_r16.o maxloc1_8_r16.o maxloc1_16_r16.o maxval_i1.o maxval_i2.o
maxval_i4.o maxval_i8.o maxval_i16.o maxval_r4.o maxval_r8.o maxval_r10.o
maxval_r16.o minloc0_4_i1.o minloc0_8_i1.o minloc0_16_i1.o minloc0_4_i2.o
minloc0_8_i2.o minloc0_16_i2.o minloc0_4_i4.o minloc0_8_i4.o minloc0_16_i4.o
minloc0_4_i8.o minloc0_8_i8.o minloc0_16_i8.o minloc0_4_i16.o minloc0_8_i16.o
minloc0_16_i16.o minloc0_4_r4.o minloc0_8_r4.o minloc0_16_r4.o minloc0_4_r8.o
minloc0_8_r8.o minloc0_16_r8.o minloc0_4_r10.o minloc0_8_r10.o minloc0_16_r10.o
minloc0_4_r16.o minloc0_8_r16.o minloc0_16_r16.o minloc1_4_i1.o minloc1_8_i1.o
minloc1_16_i1.o minloc1_4_i2.o minloc1_8_i2.o minloc1_16_i2.o minloc1_4_i4.o
minloc1_8_i4.o minloc1_16_i4.o minloc1_4_i8.o minloc1_8_i8.o minloc1_16_i8.o
minloc1_4_i16.o minloc1_8_i16.o minloc1_16_i16.o minloc1_4_r4.o minloc1_8_r4.o
minloc1_16_r4.o minloc1_4_r8.o minloc1_8_r8.o minloc1_16_r8.o minloc1_4_r10.o
minloc1_8_r10.o minloc1_16_r10.o minloc1_4_r16.o minloc1_8_r16.o
minloc1_16_r16.o minval_i1.o minval_i2.o minval_i4.o minval_i8.o minval_i16.o
minval_r4.o minval_r8.o minval_r10.o minval_r16.o product_i1.o product_i2.o
product_i4.o product_i8.o product_i16.o product_r4.o product_r8.o product_r10.o
product_r16.o product_c4.o product_c8.o product_c10.o product_c16.o sum_i1.o
sum_i2.o sum_i4.o sum_i8.o sum_i16.o sum_r4.o sum_r8.o sum_r10.o sum_r16.o
sum_c4.o sum_c8.o sum_c10.o sum_c16.o bessel_r4.o bessel_r8.o bessel_r10.o
bessel_r16.o iall_i1.o iall_i2.o iall_i4.o iall_i8.o iall_i16.o iany_i1.o
iany_i2.o iany_i4.o iany_i8.o iany_i16.o iparity_i1.o iparity_i2.o iparity_i4.o
iparity_i8.o iparity_i16.o norm2_r4.o norm2_r8.o norm2_r10.o norm2_r16.o
parity_l1.o parity_l2.o parity_l4.o parity_l8.o parity_l16.o matmul_i1.o
matmul_i2.o matmul_i4.o matmul_i8.o matmul_i16.o matmul_r4.o matmul_r8.o
matmul_r10.o matmul_r16.o matmul_c4.o matmul_c8.o matmul_c10.o matmul_c16.o
matmul_l4.o matmul_l8.o matmul_l16.o shape_i1.o shape_i2.o shape_i4.o
shape_i8.o shape_i16.o eoshift1_4.o eoshift1_8.o eoshift1_16.o eoshift3_4.o
eoshift3_8.o eoshift3_16.o cshift1_4.o cshift1_8.o cshift1_16.o reshape_i4.o
reshape_i8.o reshape_i16.o reshape_r4.o reshape_r8.o reshape_r10.o
reshape_r16.o reshape_c4.o reshape_c8.o reshape_c10.o reshape_c16.o
in_pack_i1.o in_pack_i2.o in_pack_i4.o in_pack_i8.o in_pack_i16.o in_pack_r4.o
in_pack_r8.o in_pack_r10.o in_pack_r16.o in_pack_c4.o in_pack_c8.o
in_pack_c10.o in_pack_c16.o in_unpack_i1.o in_unpack_i2.o in_unpack_i4.o
in_unpack_i8.o in_unpack_i16.o in_unpack_r4.o in_unpack_r8.o in_unpack_r10.o
in_unpack_r16.o in_unpack_c4.o in_unpack_c8.o in_unpack_c10.o in_unpack_c16.o
pow_i4_i4.o pow_i8_i4.o pow_i16_i4.o pow_r16_i4.o pow_c4_i4.o pow_c8_i4.o
pow_c10_i4.o pow_c16_i4.o pow_i4_i8.o pow_i8_i8.o pow_i16_i8.o pow_r4_i8.o
pow_r8_i8.o pow_r10_i8.o pow_r16_i8.o pow_c4_i8.o pow_c8_i8.o pow_c10_i8.o
pow_c16_i8.o pow_i4_i16.o pow_i8_i16.o pow_i16_i16.o pow_r4_i16.o pow_r8_i16.o
pow_r10_i16.o pow_r16_i16.o pow_c4_i16.o pow_c8_i16.o pow_c10_i16.o
pow_c16_i16.o pack_i1.o pack_i2.o pack_i4.o pack_i8.o pack_i16.o pack_r4.o
pack_r8.o pack_r10.o pack_r16.o pack_c4.o pack_c8.o pack_c10.o pack_c16.o
unpack_i1.o unpack_i2.o unpack_i4.o unpack_i8.o unpack_i16.o unpack_r4.o
unpack_r8.o unpack_r10.o unpack_r16.o unpack_c4.o unpack_c8.o unpack_c10.o
unpack_c16.o spread_i1.o spread_i2.o spread_i4.o spread_i8.o spread_i16.o
spread_r4.o spread_r8.o spread_r10.o spread_r16.o spread_c4.o spread_c8.o
spread_c10.o spread_c16.o cshift0_i1.o cshift0_i2.o cshift0_i4.o cshift0_i8.o
cshift0_i16.o cshift0_r4.o cshift0_r8.o cshift0_r10.o cshift0_r16.o
cshift0_c4.o cshift0_c8.o cshift0_c10.o cshift0_c16.o size_from_kind.o close.o
file_pos.o format.o inquire.o intrinsics.o list_read.o lock.o open.o read.o
transfer.o transfer128.o unit.o unix.o write.o fbuf.o associated.o abort.o
args.o cshift0.o eoshift0.o eoshift2.o erfc_scaled.o extends_type_of.o fnum.o
ierrno.o ishftc.o mvbits.o move_alloc.o pack_generic.o selected_char_kind.o
size.o spread_generic.o string_intrinsics.o rand.o random.o reshape_generic.o
reshape_packed.o selected_int_kind.o selected_real_kind.o unpack_generic.o
in_pack_generic.o in_unpack_generic.o access.o c99_functions.o chdir.o chmod.o
clock.o cpu_time.o ctime.o date_and_time.o dtime.o env.o etime.o
execute_command_line.o exit.o gerror.o getcwd.o getlog.o getXid.o hostnm.o
kill.o link.o perror.o signal.o sleep.o system.o rename.o stat.o symlnk.o
system_clock.o time.o umask.o unlink.o ieee_helper.o ieee_arithmetic.o
ieee_exceptions.o ieee_features.o _abs_c4.o _abs_c8.o _abs_c10.o _abs_c16.o
_abs_i4.o _abs_i8.o _abs_i16.o _abs_r4.o _abs_r8.o _abs_r10.o _abs_r16.o
_aimag_c4.o _aimag_c8.o _aimag_c10.o _aimag_c16.o _exp_r4.o _exp_r8.o
_exp_r10.o _exp_r16.o _exp_c4.o _exp_c8.o _exp_c10.o _exp_c16.o _log_r4.o
_log_r8.o _log_r10.o _log_r16.o _log_c4.o _log_c8.o _log_c10.o _log_c16.o
_log10_r4.o _log10_r8.o _log10_r10.o _log10_r16.o _sqrt_r4.o _sqrt_r8.o
_sqrt_r10.o _sqrt_r16.o _sqrt_c4.o _sqrt_c8.o _sqrt_c10.o _sqrt_c16.o
_asin_r4.o _asin_r8.o _asin_r10.o _asin_r16.o _asinh_r4.o _asinh_r8.o
_asinh_r10.o _asinh_r16.o _acos_r4.o _acos_r8.o _acos_r10.o _acos_r16.o
_acosh_r4.o _acosh_r8.o _acosh_r10.o _acosh_r16.o _atan_r4.o _atan_r8.o
_atan_r10.o _atan_r16.o _atanh_r4.o _atanh_r8.o _atanh_r10.o _atanh_r16.o
_sin_r4.o _sin_r8.o _sin_r10.o _sin_r16.o _sin_c4.o _sin_c8.o _sin_c10.o
_sin_c16.o _cos_r4.o _cos_r8.o _cos_r10.o _cos_r16.o _cos_c4.o _cos_c8.o
_cos_c10.o _cos_c16.o _tan_r4.o _tan_r8.o _tan_r10.o _tan_r16.o _sinh_r4.o
_sinh_r8.o _sinh_r10.o _sinh_r16.o _cosh_r4.o _cosh_r8.o _cosh_r10.o
_cosh_r16.o _tanh_r4.o _tanh_r8.o _tanh_r10.o _tanh_r16.o _conjg_c4.o
_conjg_c8.o _conjg_c10.o _conjg_c16.o _aint_r4.o _aint_r8.o _aint_r10.o
_aint_r16.o _anint_r4.o _anint_r8.o _anint_r10.o _anint_r16.o _sign_i4.o
_sign_i8.o _sign_i16.o _sign_r4.o _sign_r8.o _sign_r10.o _sign_r16.o _dim_i4.o
_dim_i8.o _dim_i16.o _dim_r4.o _dim_r8.o _dim_r10.o _dim_r16.o _atan2_r4.o
_atan2_r8.o _atan2_r10.o _atan2_r16.o _mod_i4.o _mod_i8.o _mod_i16.o _mod_r4.o
_mod_r8.o _mod_r10.o _mod_r16.o misc_specifics.o dprod_r8.o f2c_specifics.o
.libs/libgfortran.lax/libbacktrace.a/mmapio.o
.libs/libgfortran.lax/libbacktrace.a/print.o
.libs/libgfortran.lax/lt1-backtrace.o
.libs/libgfortran.lax/libbacktrace.a/sort.o
.libs/libgfortran.lax/libbacktrace.a/simple.o
.libs/libgfortran.lax/libbacktrace.a/mmap.o
.libs/libgfortran.lax/libbacktrace.a/posix.o
.libs/libgfortran.lax/libbacktrace.a/state.o
.libs/libgfortran.lax/libbacktrace.a/fileline.o
.libs/libgfortran.lax/libbacktrace.a/elf.o
.libs/libgfortran.lax/libbacktrace.a/atomic.o
.libs/libgfortran.lax/libbacktrace.a/dwarf.o
libtool: link: /usr/local/bin/ranlib .libs/libgfortran.a
libtool: link: rm -fr .libs/libgfortran.lax .libs/libgfortran.lax
libtool: link: ( cd ".libs" && rm -f "libgfortran.la" && ln -s
"../libgfortran.la" "libgfortran.la" )
true  DO=all multi-do # /usr/local/bin/gmake
:
:
:
gmake[6]: Leaving directory
'/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/powerpc64-unknown-linux-gnu/32/libgfortran'
gmake[5]: Leaving directory
'/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/powerpc64-unknown-linux-gnu/32/libgfortran'
gmake[4]: Leaving directory
'/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/powerpc64-unknown-linux-gnu/libgfortran'
:
:
:
gmake[3]: Leaving directory
'/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/powerpc64-unknown-linux-gnu/libgfortran'
gmake[2]: Leaving directory
'/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/powerpc64-unknown-linux-gnu/libgfortran'
Checking multilib configuration for libobjc...
mkdir -p -- powerpc64-unknown-linux-gnu/libobjc
Configuring in powerpc64-unknown-linux-gnu/libobjc
configure: creating cache ./config.cache
checking build system type... powerpc64-unknown-linux-gnu
checking for --enable-version-specific-runtime-libs... no
checking host system type... powerpc64-unknown-linux-gnu
checking target system type... powerpc64-unknown-linux-gnu
checking for powerpc64-unknown-linux-gnu-gcc...
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include   
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    accepts -g... yes
checking for /usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    option to accept ISO
C89... none needed
checking for powerpc64-unknown-linux-gnu-as...
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/as
checking for powerpc64-unknown-linux-gnu-ar... /usr/local/bin/ar
checking for powerpc64-unknown-linux-gnu-ranlib... /usr/local/bin/ranlib
checking for a BSD-compatible install... /usr/bin/install -c
checking whether to enable maintainer-specific portions of Makefiles... no
checking how to print strings... printf
checking for a sed that does not truncate output... /usr/local/bin/sed
checking for grep that handles long lines and -e... /usr/local/bin/grep
checking for egrep... /usr/local/bin/grep -E
checking for fgrep... /usr/local/bin/grep -F
checking for ld used by
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include   ...
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/collect-ld
checking if the linker
(/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/collect-ld) is
GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)...
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/nm
checking the name lister
(/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/nm) interface...
BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... yes
checking for
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/collect-ld option
to reload object files... -r
checking for powerpc64-unknown-linux-gnu-objdump... /usr/local/bin/objdump
checking how to recognize dependent libraries... pass_all
checking for powerpc64-unknown-linux-gnu-ar... (cached) /usr/local/bin/ar
checking for powerpc64-unknown-linux-gnu-strip... /usr/local/bin/strip
checking for powerpc64-unknown-linux-gnu-ranlib... (cached)
/usr/local/bin/ranlib
checking for gawk... mawk
checking command to parse
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/nm output from
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    object... ok
checking how to run the C preprocessor...
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if /usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    supports -fno-rtti
-fno-exceptions... no
checking for /usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    option to produce
PIC... -fPIC -DPIC
checking if /usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    PIC flag -fPIC -DPIC
works... yes
checking if /usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    static flag -static
works... yes
checking if /usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    supports -c -o
file.o... yes
checking if /usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    supports -c -o
file.o... (cached) yes
checking whether the
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    linker
(/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/collect-ld)
supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking whether
/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/xgcc
-B/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002/./gcc/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/bin/
-B/usr/local/gcc7/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/gcc7/powerpc64-unknown-linux-gnu/sys-include    and cc understand -c
and -o together... yes
checking whether /usr/local/bin/gmake sets $(MAKE)... yes
checking stdio.h usability... yes
checking stdio.h presence... yes
checking for stdio.h... yes
checking for ANSI C header files... (cached) yes
checking sched.h usability... yes
checking sched.h presence... yes
checking for sched.h... yes
checking whether the target supports thread-local storage... yes
checking if the type of bitfields matters... yes
checking for bdw garbage collector... checking for system boehm-gc...
configure: error: system bdw-gc required but not found
gmake[1]: *** [Makefile:22695: configure-target-libobjc] Error 1
gmake[1]: Leaving directory
'/usr/local/build/gcc-7.2.0_linux_4.13.0-1-powerpc64.002'
gmake: *** [Makefile:941: all] Error 2
Command exited with non-zero status 2
$


This is quite late in stage3 and very unexpected that a new requirement would
appear. 

Solution MAY be this : 

root@nix:~# apt-get install libgc-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libgc1c2
The following NEW packages will be installed:
  libgc-dev libgc1c2
... etc 

However a whole new configure stage and re-compile is needed to verify that
this is 
a hard dependency in the bootstrap process.  Should be documented ?