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Sorry for the late response zurozuro and cpuheater. The glibc 2.28 issue is fixed in gcc5 5.5.0-3.

Same issue here. The reason is that the function ustat was removed in glibc-2.28: https://lists.gnu.org/archive/html/info-gnu/2018-08/msg00000.html

There's an AUR package for glibc-2.27 which installs into /opt/glibc-2.27/ but I couldn't figure out yet how to compile with this custom glibc. Probably the easiest approach would be to modify the glibc-2.27 package such that it replaces the system's glibc.

I have encountered problem compiling gcc. Any ideas?

../x86_64-pc-linux-gnu/libgo/.libs/libgo.so: undefined reference to `ustat'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:626: go] Error 1
make[2]: Leaving directory '~/Downloads/gcc5/src/gcc-build/gotools'
make[1]: *** [Makefile:13197: all-gotools] Error 2
make[1]: Leaving directory '~/Downloads/gcc5/src/gcc-build'
make: *** [Makefile:907: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...

It fails to compile for me after about 20 minutes of compiling, which is pretty far into it since I have a 6 core/12 thread Xeon with 64 GB of DDR4 ECC and I'm compiling in /tmp

configure output, since the comments section destroyed the formatting: https://hastebin.com/

After looking at line 907 in the Makefile, it's apparently failing during the final stage of compilation. "The target built for a native non-bootstrap build"

Don't want to compile such a beast. Not enough space and CPU power. :(

Wish someone would share their pre-built binaries and make a -bin package instead.

@k0ste, ok good. I've added that line to the PKGBUILD as multiple people are having the same issue without it.

@lonaowna, yes was I have outdated makepkg.conf (2015 year last change), but this not help.

Preload was help, build successful, thanks.

@k0ste, did you try adding export LD_PRELOAD=/usr/lib/libstdc++.so above make?

Also, is CHOST="x86_64-pc-linux-gnu" in /etc/makepkg.conf or did you change it?

I get segfault (make without yaourt, just makepkg. Suggestions?

../libtool: line 1132: 14019 Segmentation fault      (core dumped) ar rc .libs/libstdc++.a compatibility.o compatibility-debug_list.o compatibility-debug_list-2.o compatibility-c++0x.o compatibility-atomic-c++0x.o compatibility-thread-c++0x.o compatibility-chrono.o 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/del_op.o .libs/libstdc++.lax/libsupc++convenience.a/del_ops.o .libs/libstdc++.lax/libsupc++convenience.a/del_opnt.o .libs/libstdc++.lax/libsupc++convenience.a/del_opv.o .libs/libstdc++.lax/libsupc++convenience.a/del_opvs.o .libs/libstdc++.lax/libsupc++convenience.a/del_opvnt.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_tm.o .libs/libstdc++.lax/libsupc++convenience.a/eh_throw.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/libstdc++.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_opnt.o .libs/libstdc++.lax/libsupc++convenience.a/new_opv.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/libsupc++convenience.a/cp-demangle.o .libs/libstdc++.lax/libc++98convenience.a/bitmap_allocator.o .libs/libstdc++.lax/libc++98convenience.a/pool_allocator.o .libs/libstdc++.lax/libc++98convenience.a/mt_allocator.o .libs/libstdc++.lax/libc++98convenience.a/codecvt.o .libs/libstdc++.lax/libc++98convenience.a/complex_io.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/list.o .libs/libstdc++.lax/libc++98convenience.a/list-aux.o .libs/libstdc++.lax/libc++98convenience.a/list-aux-2.o .libs/libstdc++.lax/libc++98convenience.a/list_associated.o .libs/libstdc++.lax/libc++98convenience.a/list_associated-2.o .libs/libstdc++.lax/libc++98convenience.a/locale.o .libs/libstdc++.lax/libc++98convenience.a/locale_init.o .libs/libstdc++.lax/libc++98convenience.a/locale_facets.o .libs/libstdc++.lax/libc++98convenience.a/localename.o .libs/libstdc++.lax/libc++98convenience.a/math_stubs_float.o .libs/libstdc++.lax/libc++98convenience.a/math_stubs_long_double.o .libs/libstdc++.lax/libc++98convenience.a/stdexcept.o .libs/libstdc++.lax/libc++98convenience.a/strstream.o .libs/libstdc++.lax/libc++98convenience.a/tree.o .libs/libstdc++.lax/libc++98convenience.a/istream.o .libs/libstdc++.lax/libc++98convenience.a/istream-string.o .libs/libstdc++.lax/libc++98convenience.a/streambuf.o .libs/libstdc++.lax/libc++98convenience.a/valarray.o .libs/libstdc++.lax/libc++98convenience.a/cow-istream-string.o .libs/libstdc++.lax/libc++98convenience.a/collate_members_cow.o .libs/libstdc++.lax/libc++98convenience.a/messages_members_cow.o .libs/libstdc++.lax/libc++98convenience.a/monetary_members_cow.o .libs/libstdc++.lax/libc++98convenience.a/numeric_members_cow.o .libs/libstdc++.lax/libc++98convenience.a/atomicity.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/messages_members.o .libs/libstdc++.lax/libc++98convenience.a/monetary_members.o .libs/libstdc++.lax/libc++98convenience.a/numeric_members.o .libs/libstdc++.lax/libc++98convenience.a/time_members.o .libs/libstdc++.lax/libc++98convenience.a/basic_file.o .libs/libstdc++.lax/libc++98convenience.a/c++locale.o .libs/libstdc++.lax/libc++98convenience.a/allocator-inst.o .libs/libstdc++.lax/libc++98convenience.a/concept-inst.o .libs/libstdc++.lax/libc++98convenience.a/ext-inst.o .libs/libstdc++.lax/libc++98convenience.a/misc-inst.o .libs/libstdc++.lax/libc++98convenience.a/parallel_settings.o .libs/libstdc++.lax/libc++11convenience.a/chrono.o .libs/libstdc++.lax/lt1-codecvt.o .libs/libstdc++.lax/libc++11convenience.a/condition_variable.o .libs/libstdc++.lax/libc++11convenience.a/cow-stdexcept.o .libs/libstdc++.lax/libc++11convenience.a/ctype.o .libs/libstdc++.lax/libc++11convenience.a/debug.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.o .libs/libstdc++.lax/libc++11convenience.a/limits.o .libs/libstdc++.lax/libc++11convenience.a/mutex.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/system_error.o .libs/libstdc++.lax/libc++11convenience.a/thread.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/cxx11-hash_tr1.o .libs/libstdc++.lax/libc++11convenience.a/cxx11-ios_failure.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/ctype_configure_char.o .libs/libstdc++.lax/libc++11convenience.a/ctype_members.o .libs/libstdc++.lax/libc++11convenience.a/cow-fstream-inst.o .libs/libstdc++.lax/libc++11convenience.a/cow-sstream-inst.o .libs/libstdc++.lax/libc++11convenience.a/cow-string-inst.o .libs/libstdc++.lax/libc++11convenience.a/cow-wstring-inst.o .libs/libstdc++.lax/libc++11convenience.a/cxx11-locale-inst.o .libs/libstdc++.lax/libc++11convenience.a/cxx11-wlocale-inst.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/ios-inst.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/locale-inst.o .libs/libstdc++.lax/libc++11convenience.a/ostream-inst.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/wlocale-inst.o .libs/libstdc++.lax/libc++11convenience.a/wstring-inst.o
make[6]: *** [Makefile:605: libstdc++.la] Error 139
make[6]: Leaving directory '/mnt/filez/builder/gcc5/src/gcc-build/x86_64-unknown-linux-gnu/libstdc++-v3/src'
make[5]: *** [Makefile:637: all-recursive] Error 1
make[5]: Leaving directory '/mnt/filez/builder/gcc5/src/gcc-build/x86_64-unknown-linux-gnu/libstdc++-v3/src'
make[4]: *** [Makefile:507: all-recursive] Error 1
make[4]: Leaving directory '/mnt/filez/builder/gcc5/src/gcc-build/x86_64-unknown-linux-gnu/libstdc++-v3'
make[3]: *** [Makefile:414: all] Error 2
make[3]: Leaving directory '/mnt/filez/builder/gcc5/src/gcc-build/x86_64-unknown-linux-gnu/libstdc++-v3'
make[2]: *** [Makefile:13894: all-stage1-target-libstdc++-v3] Error 2
make[2]: Leaving directory '/mnt/filez/builder/gcc5/src/gcc-build'
make[1]: *** [Makefile:22897: stage1-bubble] Error 2
make[1]: Leaving directory '/mnt/filez/builder/gcc5/src/gcc-build'
make: *** [Makefile:905: all] Error 2

@ArnaudNux it builds fine for me. Have you tried without Yaourt? If so, does adding export LD_PRELOAD=/usr/lib/libstdc++.so above make change anything?

(next time, please wrap code/output in a block with triple backticks; see this)