Problem installing gcc10 on Big Sur

I followed the instructions at

https://sourceforge.net/p/fink/mailman/message/37159913/

To do a new installation on Big Sur.

Installing gcc10 failed with
<begin>
libtool: link:  /opt/sw/src/fink.build/gcc10-10.3.0-1/darwin_objdir/./gcc/xgcc -shared-libgcc -B/opt/sw/src/fink.build/gcc10-10.3.0-1/darwin_objdir/./gcc -nostdinc++ -L/opt/sw/src/fink.build/gcc10-10.3.0-1/darwin_objdir/x86_64-apple-darwin20.6.0/libstdc++-v3/src -L/opt/sw/src/fink.build/gcc10-10.3.0-1/darwin_objdir/x86_64-apple-darwin20.6.0/libstdc++-v3/src/.libs -L/opt/sw/src/fink.build/gcc10-10.3.0-1/darwin_objdir/x86_64-apple-darwin20.6.0/libstdc++-v3/libsupc++/.libs -B/opt/sw/lib/gcc10/x86_64-apple-darwin20.6.0/bin/ -B/opt/sw/lib/gcc10/x86_64-apple-darwin20.6.0/lib/ -isystem /opt/sw/lib/gcc10/x86_64-apple-darwin20.6.0/include -isystem /opt/sw/lib/gcc10/x86_64-apple-darwin20.6.0/sys-include   -fno-checking -dynamiclib  -o .libs/libstdc++.6.dylib  .libs/compatibility.o .libs/compatibilit
 y-debug_list.o .libs/compatibility-debug_list-2.o .libs/compatibility-c++0x.o .libs/compatibility-atomic-c++0x.o .libs/compatibility-thread-c++0x.o .libs/compatibility-chrono.o .libs/compatibility-condvar.o   .libs/libstdc++.lax/libsupc++convenience.a/array_type_info.o .libs/libstdc++.lax/libsupc++convenience.a/atexit_arm.o .libs/libstdc++.lax/libsupc++convenience.a/atexit_thread.o .libs/libstdc++.lax/libsupc++convenience.a/bad_alloc.o .libs/libstdc++.lax/libsupc++convenience.a/bad_array_length.o .libs/libstdc++.lax/libsupc++convenience.a/bad_array_new.o .libs/libstdc++.lax/libsupc++convenience.a/bad_cast.o .libs/libstdc++.lax/libsupc++convenience.a/bad_typeid.o .libs/libstdc++.lax/libsupc++convenience.a/class_type_info.o .libs/libstdc++.lax/libsupc++convenience.a/cp-demangle.o .libs/lib
 stdc++.lax/libsupc++convenience.a/del_op.o .libs/libstdc++.lax/libsupc++convenience.a/del_opa.o .libs/libstdc++.lax/libsupc++convenience.a/del_opant.o .libs/libstdc++.lax/libsupc++convenience.a/del_opnt.o .libs/libstdc++.lax/libsupc++convenience.a/del_ops.o .libs/libstdc++.lax/libsupc++convenience.a/del_opsa.o .libs/libstdc++.lax/libsupc++convenience.a/del_opv.o .libs/libstdc++.lax/libsupc++convenience.a/del_opva.o .libs/libstdc++.lax/libsupc++convenience.a/del_opvant.o .libs/libstdc++.lax/libsupc++convenience.a/del_opvnt.o .libs/libstdc++.lax/libsupc++convenience.a/del_opvs.o .libs/libstdc++.lax/libsupc++convenience.a/del_opvsa.o .libs/libstdc++.lax/libsupc++convenience.a/dyncast.o .libs/libstdc++.lax/libsupc++convenience.a/eh_alloc.o .libs/libstdc++.lax/libsupc++convenience.a/eh_arm.o 
 .libs/libstdc++.lax/libsupc++convenience.a/eh_aux_runtime.o .libs/libstdc++.lax/libsupc++convenience.a/eh_call.o .libs/libstdc++.lax/libsupc++convenience.a/eh_catch.o .libs/libstdc++.lax/libsupc++convenience.a/eh_exception.o .libs/libstdc++.lax/libsupc++convenience.a/eh_globals.o .libs/libstdc++.lax/libsupc++convenience.a/eh_personality.o .libs/libstdc++.lax/libsupc++convenience.a/eh_ptr.o .libs/libstdc++.lax/libsupc++convenience.a/eh_term_handler.o .libs/libstdc++.lax/libsupc++convenience.a/eh_terminate.o .libs/libstdc++.lax/libsupc++convenience.a/eh_throw.o .libs/libstdc++.lax/libsupc++convenience.a/eh_tm.o .libs/libstdc++.lax/libsupc++convenience.a/eh_type.o .libs/libstdc++.lax/libsupc++convenience.a/eh_unex_handler.o .libs/libstdc++.lax/libsupc++convenience.a/enum_type_info.o .libs/l
 ibstdc++.lax/libsupc++convenience.a/function_type_info.o .libs/libstdc++.lax/libsupc++convenience.a/fundamental_type_info.o .libs/libstdc++.lax/libsupc++convenience.a/guard.o .libs/libstdc++.lax/libsupc++convenience.a/guard_error.o .libs/libstdc++.lax/libsupc++convenience.a/hash_bytes.o .libs/libstdc++.lax/libsupc++convenience.a/nested_exception.o .libs/libstdc++.lax/libsupc++convenience.a/new_handler.o .libs/libstdc++.lax/libsupc++convenience.a/new_op.o .libs/libstdc++.lax/libsupc++convenience.a/new_opa.o .libs/libstdc++.lax/libsupc++convenience.a/new_opant.o .libs/libstdc++.lax/libsupc++convenience.a/new_opnt.o .libs/libstdc++.lax/libsupc++convenience.a/new_opv.o .libs/libstdc++.lax/libsupc++convenience.a/new_opva.o .libs/libstdc++.lax/libsupc++convenience.a/new_opvant.o .libs/libstdc+
 +.lax/libsupc++convenience.a/new_opvnt.o .libs/libstdc++.lax/libsupc++convenience.a/pbase_type_info.o .libs/libstdc++.lax/libsupc++convenience.a/pmem_type_info.o .libs/libstdc++.lax/libsupc++convenience.a/pointer_type_info.o .libs/libstdc++.lax/libsupc++convenience.a/pure.o .libs/libstdc++.lax/libsupc++convenience.a/si_class_type_info.o .libs/libstdc++.lax/libsupc++convenience.a/tinfo.o .libs/libstdc++.lax/libsupc++convenience.a/tinfo2.o .libs/libstdc++.lax/libsupc++convenience.a/vec.o .libs/libstdc++.lax/libsupc++convenience.a/vmi_class_type_info.o .libs/libstdc++.lax/libsupc++convenience.a/vterminate.o  .libs/libstdc++.lax/libc++98convenience.a/allocator-inst.o .libs/libstdc++.lax/libc++98convenience.a/atomicity.o .libs/libstdc++.lax/libc++98convenience.a/basic_file.o .libs/libstdc++.l
 ax/libc++98convenience.a/bitmap_allocator.o .libs/libstdc++.lax/libc++98convenience.a/c++locale.o .libs/libstdc++.lax/libc++98convenience.a/codecvt.o .libs/libstdc++.lax/libc++98convenience.a/codecvt_members.o .libs/libstdc++.lax/libc++98convenience.a/collate_members.o .libs/libstdc++.lax/libc++98convenience.a/collate_members_cow.o .libs/libstdc++.lax/libc++98convenience.a/complex_io.o .libs/libstdc++.lax/libc++98convenience.a/concept-inst.o .libs/libstdc++.lax/libc++98convenience.a/cow-istream-string.o .libs/libstdc++.lax/libc++98convenience.a/ext-inst.o .libs/libstdc++.lax/libc++98convenience.a/globals_io.o .libs/libstdc++.lax/libc++98convenience.a/hash_tr1.o .libs/libstdc++.lax/libc++98convenience.a/hashtable_tr1.o .libs/libstdc++.lax/libc++98convenience.a/ios_failure.o .libs/libstdc+
 +.lax/libc++98convenience.a/ios_init.o .libs/libstdc++.lax/libc++98convenience.a/ios_locale.o .libs/libstdc++.lax/libc++98convenience.a/istream-string.o .libs/libstdc++.lax/libc++98convenience.a/istream.o .libs/libstdc++.lax/libc++98convenience.a/list-aux-2.o .libs/libstdc++.lax/libc++98convenience.a/list-aux.o .libs/libstdc++.lax/libc++98convenience.a/list.o .libs/libstdc++.lax/libc++98convenience.a/list_associated-2.o .libs/libstdc++.lax/libc++98convenience.a/list_associated.o .libs/libstdc++.lax/libc++98convenience.a/locale.o .libs/libstdc++.lax/libc++98convenience.a/locale_facets.o .libs/libstdc++.lax/libc++98convenience.a/locale_init.o .libs/libstdc++.lax/libc++98convenience.a/localename.o .libs/libstdc++.lax/libc++98convenience.a/math_stubs_float.o .libs/libstdc++.lax/libc++98conve
 nience.a/math_stubs_long_double.o .libs/libstdc++.lax/libc++98convenience.a/messages_members.o .libs/libstdc++.lax/libc++98convenience.a/messages_members_cow.o .libs/libstdc++.lax/libc++98convenience.a/misc-inst.o .libs/libstdc++.lax/libc++98convenience.a/monetary_members.o .libs/libstdc++.lax/libc++98convenience.a/monetary_members_cow.o .libs/libstdc++.lax/libc++98convenience.a/mt_allocator.o .libs/libstdc++.lax/libc++98convenience.a/numeric_members.o .libs/libstdc++.lax/libc++98convenience.a/numeric_members_cow.o .libs/libstdc++.lax/libc++98convenience.a/parallel_settings.o .libs/libstdc++.lax/libc++98convenience.a/pool_allocator.o .libs/libstdc++.lax/libc++98convenience.a/stdexcept.o .libs/libstdc++.lax/libc++98convenience.a/streambuf.o .libs/libstdc++.lax/libc++98convenience.a/strstr
 eam.o .libs/libstdc++.lax/libc++98convenience.a/time_members.o .libs/libstdc++.lax/libc++98convenience.a/tree.o .libs/libstdc++.lax/libc++98convenience.a/valarray.o  .libs/libstdc++.lax/libc++11convenience.a/chrono.o .libs/libstdc++.lax/libc++11convenience.a/codecvt.o .libs/libstdc++.lax/libc++11convenience.a/condition_variable.o .libs/libstdc++.lax/libc++11convenience.a/cow-fstream-inst.o .libs/libstdc++.lax/libc++11convenience.a/cow-locale_init.o .libs/libstdc++.lax/libc++11convenience.a/cow-shim_facets.o .libs/libstdc++.lax/libc++11convenience.a/cow-sstream-inst.o .libs/libstdc++.lax/libc++11convenience.a/cow-stdexcept.o .libs/libstdc++.lax/libc++11convenience.a/cow-string-inst.o .libs/libstdc++.lax/libc++11convenience.a/cow-string-io-inst.o .libs/libstdc++.lax/libc++11convenience.a/c
 ow-wstring-inst.o .libs/libstdc++.lax/libc++11convenience.a/cow-wstring-io-inst.o .libs/libstdc++.lax/libc++11convenience.a/ctype.o .libs/libstdc++.lax/libc++11convenience.a/ctype_configure_char.o .libs/libstdc++.lax/libc++11convenience.a/ctype_members.o .libs/libstdc++.lax/libc++11convenience.a/cxx11-hash_tr1.o .libs/libstdc++.lax/libc++11convenience.a/cxx11-ios_failure.o .libs/libstdc++.lax/libc++11convenience.a/cxx11-locale-inst.o .libs/libstdc++.lax/libc++11convenience.a/cxx11-shim_facets.o .libs/libstdc++.lax/libc++11convenience.a/cxx11-stdexcept.o .libs/libstdc++.lax/libc++11convenience.a/cxx11-wlocale-inst.o .libs/libstdc++.lax/libc++11convenience.a/debug.o .libs/libstdc++.lax/libc++11convenience.a/ext11-inst.o .libs/libstdc++.lax/libc++11convenience.a/fstream-inst.o .libs/libstdc
 ++.lax/libc++11convenience.a/functexcept.o .libs/libstdc++.lax/libc++11convenience.a/functional.o .libs/libstdc++.lax/libc++11convenience.a/futex.o .libs/libstdc++.lax/libc++11convenience.a/future.o .libs/libstdc++.lax/libc++11convenience.a/hash_c++0x.o .libs/libstdc++.lax/libc++11convenience.a/hashtable_c++0x.o .libs/libstdc++.lax/libc++11convenience.a/ios-inst.o .libs/libstdc++.lax/libc++11convenience.a/ios.o .libs/libstdc++.lax/libc++11convenience.a/iostream-inst.o .libs/libstdc++.lax/libc++11convenience.a/istream-inst.o .libs/libstdc++.lax/libc++11convenience.a/limits.o .libs/libstdc++.lax/libc++11convenience.a/locale-inst.o .libs/libstdc++.lax/libc++11convenience.a/mutex.o .libs/libstdc++.lax/libc++11convenience.a/ostream-inst.o .libs/libstdc++.lax/libc++11convenience.a/placeholders
 .o .libs/libstdc++.lax/libc++11convenience.a/random.o .libs/libstdc++.lax/libc++11convenience.a/regex.o .libs/libstdc++.lax/libc++11convenience.a/shared_ptr.o .libs/libstdc++.lax/libc++11convenience.a/snprintf_lite.o .libs/libstdc++.lax/libc++11convenience.a/sso_string.o .libs/libstdc++.lax/libc++11convenience.a/sstream-inst.o .libs/libstdc++.lax/libc++11convenience.a/streambuf-inst.o .libs/libstdc++.lax/libc++11convenience.a/string-inst.o .libs/libstdc++.lax/libc++11convenience.a/string-io-inst.o .libs/libstdc++.lax/libc++11convenience.a/system_error.o .libs/libstdc++.lax/libc++11convenience.a/thread.o .libs/libstdc++.lax/libc++11convenience.a/wlocale-inst.o .libs/libstdc++.lax/libc++11convenience.a/wstring-inst.o .libs/libstdc++.lax/libc++11convenience.a/wstring-io-inst.o  .libs/libstd
 c++.lax/libc++17convenience.a/cow-fs_dir.o .libs/libstdc++.lax/libc++17convenience.a/cow-fs_ops.o .libs/libstdc++.lax/libc++17convenience.a/cow-fs_path.o .libs/libstdc++.lax/libc++17convenience.a/cow-string-inst.o .libs/libstdc++.lax/libc++17convenience.a/fs_dir.o .libs/libstdc++.lax/libc++17convenience.a/fs_ops.o .libs/libstdc++.lax/libc++17convenience.a/fs_path.o .libs/libstdc++.lax/libc++17convenience.a/memory_resource.o .libs/libstdc++.lax/libc++17convenience.a/ostream-inst.o .libs/libstdc++.lax/libc++17convenience.a/string-inst.o   -L/opt/sw/src/fink.build/gcc10-10.3.0-1/darwin_objdir/x86_64-apple-darwin20.6.0/libstdc++-v3/libsupc++/.libs -L/opt/sw/src/fink.build/gcc10-10.3.0-1/darwin_objdir/x86_64-apple-darwin20.6.0/libstdc++-v3/src -L/opt/sw/src/fink.build/gcc10-10.3.0-1/darwin_ob
 jdir/x86_64-apple-darwin20.6.0/libstdc++-v3/src/.libs -lm  -Wl,-exported_symbols_list -Wl,libstdc++-symbols.explist   -install_name  /opt/sw/lib/gcc10/lib/libstdc++.6.dylib -compatibility_version 7 -current_version 7.28 -Wl,-single_module
collect2: fatal error: ld terminated with signal 11 [Segmentation fault: 11]
compilation terminated.
make[6]: *** [libstdc++.la] Error 1
make[5]: *** [all-recursive] Error 1
make[4]: *** [all-recursive] Error 1
make[3]: *** [all] Error 2
make[2]: *** [all-stage1-target-libstdc++-v3] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [bootstrap] Error 2
### execution of /tmp/fink.d9mqe failed, exit code 2
### execution of /tmp/fink.Ycxbl failed, exit code 2
Removing runtime build-lock...
Removing build-lock package...
/opt/sw/bin/dpkg-lockwait -r fink-buildlock-gcc10-10.3.0-1
(Reading database ... 6929 files and directories currently installed.)
Removing fink-buildlock-gcc10-10.3.0-1 (2021.08.28-15.01.22) ...
Failed: phase compiling: gcc10-10.3.0-1 failed

Before reporting any errors, please run "fink selfupdate" and try again.
Also try using "fink configure" to set your maximum build jobs to 1 and
attempt to build the package again.
If you continue to have issues, please check to see if the FAQ on Fink's 
website solves the problem.  If not, ask on one (not both, please) of
these mailing lists:

        The Fink Users List <[email protected]>
        The Fink Beginners List <[email protected]>.

Please try to include the complete error message in your report.  This
generally consists of a compiler line starting with e.g. "gcc" or "g++"
followed by the actual error output from the compiler.

Also include the following system information:
Package manager version: 0.45.99.git
Distribution version: selfupdate-rsync Sat Aug 28 14:28:43 2021, 11.3, x86_64
Trees: local/main stable/main
No recognized Xcode.app installed
Xcode command-line tools: 12.5.1.0.1.1623191612
Max. Fink build jobs:  12
</begin>

Suggestions?

Brad

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