I just try to compile again - and got this:

build-debug$ sudo rm -Rf * && cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_COMPILER=clang++ -D CMAKE_C_COMPILER=clang -DCMAKE_CXX_FLAGS=-stdlib=libc++ -DLLVM_USE_LINKER=gold -G Ninja ../llvm-project/llvm
-- The C compiler identification is Clang 10.0.0
-- The CXX compiler identification is Clang 10.0.0
-- The ASM compiler identification is Clang
-- Found assembler: /usr/bin/clang
-- Check for working C compiler: /usr/bin/clang
-- Check for working C compiler: /usr/bin/clang -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/clang++
-- Check for working CXX compiler: /usr/bin/clang++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Performing Test LLVM_LIBSTDCXX_MIN
-- Performing Test LLVM_LIBSTDCXX_MIN - Success
-- Performing Test LLVM_LIBSTDCXX_SOFT_ERROR
-- Performing Test LLVM_LIBSTDCXX_SOFT_ERROR - Success
-- Looking for dlfcn.h
-- Looking for dlfcn.h - found
-- Looking for errno.h
-- Looking for errno.h - found
-- Looking for fcntl.h
-- Looking for fcntl.h - found
-- Looking for link.h
-- Looking for link.h - found
-- Looking for malloc/malloc.h
-- Looking for malloc/malloc.h - not found
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for signal.h
-- Looking for signal.h - found
-- Looking for sys/ioctl.h
-- Looking for sys/ioctl.h - found
-- Looking for sys/mman.h
-- Looking for sys/mman.h - found
-- Looking for sys/param.h
-- Looking for sys/param.h - found
-- Looking for sys/resource.h
-- Looking for sys/resource.h - found
-- Looking for sys/stat.h
-- Looking for sys/stat.h - found
-- Looking for sys/time.h
-- Looking for sys/time.h - found
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for termios.h
-- Looking for termios.h - found
-- Looking for unistd.h
-- Looking for unistd.h - found
-- Looking for valgrind/valgrind.h
-- Looking for valgrind/valgrind.h - not found
-- Looking for fenv.h
-- Looking for fenv.h - found
-- Looking for FE_ALL_EXCEPT
-- Looking for FE_ALL_EXCEPT - found
-- Looking for FE_INEXACT
-- Looking for FE_INEXACT - found
-- Looking for mach/mach.h
-- Looking for mach/mach.h - not found
-- Looking for histedit.h
-- Looking for histedit.h - not found
-- Looking for CrashReporterClient.h
-- Looking for CrashReporterClient.h - not found
-- Looking for linux/magic.h
-- Looking for linux/magic.h - found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Looking for pthread_getspecific in pthread
-- Looking for pthread_getspecific in pthread - found
-- Looking for pthread_rwlock_init in pthread
-- Looking for pthread_rwlock_init in pthread - found
-- Looking for pthread_mutex_lock in pthread
-- Looking for pthread_mutex_lock in pthread - found
-- Looking for dlopen in dl
-- Looking for dlopen in dl - found
-- Looking for clock_gettime in rt
-- Looking for clock_gettime in rt - found
-- Looking for pfm_initialize in pfm
-- Looking for pfm_initialize in pfm - not found
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Looking for setupterm in terminfo
-- Looking for setupterm in terminfo - not found
-- Looking for setupterm in tinfo
-- Looking for setupterm in tinfo - found
-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.2.11")
-- Could NOT find LibXml2 (missing: LIBXML2_LIBRARY LIBXML2_INCLUDE_DIR)
-- Looking for xar_open in xar
-- Looking for xar_open in xar - not found
-- Looking for arc4random
-- Looking for arc4random - not found
-- Looking for backtrace
-- Looking for backtrace - found
-- backtrace facility detected in default set of libraries
-- Found Backtrace: /usr/include
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Success
-- Looking for _Unwind_Backtrace
-- Looking for _Unwind_Backtrace - found
-- Looking for getpagesize
-- Looking for getpagesize - found
-- Looking for sysconf
-- Looking for sysconf - found
-- Looking for getrusage
-- Looking for getrusage - found
-- Looking for setrlimit
-- Looking for setrlimit - found
-- Looking for isatty
-- Looking for isatty - found
-- Looking for futimens
-- Looking for futimens - found
-- Looking for futimes
-- Looking for futimes - found
-- Looking for posix_fallocate
-- Looking for posix_fallocate - found
-- Looking for sigaltstack
-- Looking for sigaltstack - found
-- Looking for lseek64
-- Looking for lseek64 - found
-- Looking for mallctl
-- Looking for mallctl - not found
-- Looking for mallinfo
-- Looking for mallinfo - found
-- Looking for malloc_zone_statistics
-- Looking for malloc_zone_statistics - not found
-- Looking for getrlimit
-- Looking for getrlimit - found
-- Looking for posix_spawn
-- Looking for posix_spawn - found
-- Looking for pread
-- Looking for pread - found
-- Looking for sbrk
-- Looking for sbrk - found
-- Looking for strerror
-- Looking for strerror - found
-- Looking for strerror_r
-- Looking for strerror_r - found
-- Looking for strerror_s
-- Looking for strerror_s - not found
-- Looking for setenv
-- Looking for setenv - found
-- Looking for dlopen
-- Looking for dlopen - found
-- Looking for dladdr
-- Looking for dladdr - not found
-- Performing Test HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
-- Performing Test HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC - Failed
-- Performing Test HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
-- Performing Test HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC - Success
-- Looking for GLIBC
-- Looking for GLIBC - found
-- Looking for pthread_getname_np
-- Looking for pthread_getname_np - found
-- Looking for pthread_setname_np
-- Looking for pthread_setname_np - found
-- Performing Test HAVE_STD_IS_TRIVIALLY_COPYABLE
-- Performing Test HAVE_STD_IS_TRIVIALLY_COPYABLE - Success
-- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB
-- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB - Success
-- Performing Test HAVE_CXX_ATOMICS64_WITHOUT_LIB
-- Performing Test HAVE_CXX_ATOMICS64_WITHOUT_LIB - Success
-- Performing Test LLVM_HAS_ATOMICS
-- Performing Test LLVM_HAS_ATOMICS - Success
-- Performing Test SUPPORTS_VARIADIC_MACROS_FLAG
-- Performing Test SUPPORTS_VARIADIC_MACROS_FLAG - Success
-- Performing Test SUPPORTS_GNU_ZERO_VARIADIC_MACRO_ARGUMENTS_FLAG
-- Performing Test SUPPORTS_GNU_ZERO_VARIADIC_MACRO_ARGUMENTS_FLAG - Success
-- Native target architecture is X86
-- Threads enabled.
-- Doxygen disabled.
-- Go bindings disabled.
-- Ninja version: 1.10.0.git.kitware.jobserver-1
-- Could NOT find OCaml (missing: OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH)
-- Could NOT find OCaml (missing: OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH)
-- OCaml bindings disabled.
-- Could NOT find Python module pygments
-- Could NOT find Python module pygments.lexers.c_cpp
-- Could NOT find Python module yaml
-- LLVM host triple: x86_64-unknown-linux-gnu
-- LLVM default target triple: x86_64-unknown-linux-gnu
-- Performing Test CXX_SUPPORTS_CUSTOM_LINKER
-- Performing Test CXX_SUPPORTS_CUSTOM_LINKER - Success
-- Performing Test C_SUPPORTS_FPIC
-- Performing Test C_SUPPORTS_FPIC - Success
-- Performing Test CXX_SUPPORTS_FPIC
-- Performing Test CXX_SUPPORTS_FPIC - Success
-- Building with -fPIC
-- Performing Test SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG
-- Performing Test SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG - Success
-- Performing Test C_SUPPORTS_WERROR_DATE_TIME
-- Performing Test C_SUPPORTS_WERROR_DATE_TIME - Success
-- Performing Test CXX_SUPPORTS_WERROR_DATE_TIME
-- Performing Test CXX_SUPPORTS_WERROR_DATE_TIME - Success
-- Performing Test CXX_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
-- Performing Test CXX_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Success
-- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG
-- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG - Success
-- Performing Test C_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG
-- Performing Test C_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG - Success
-- Performing Test CXX_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG
-- Performing Test CXX_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG - Success
-- Performing Test C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
-- Performing Test C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG - Success
-- Performing Test CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
-- Performing Test CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG - Success
-- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG
-- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG - Failed
-- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG
-- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG - Success
-- Performing Test CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR
-- Performing Test CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR - Success
-- Performing Test C_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG
-- Performing Test C_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG - Success
-- Performing Test CXX_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG
-- Performing Test CXX_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG - Success
-- Performing Test CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG
-- Performing Test CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG - Failed
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP - Success
-- Performing Test C_SUPPORTS_STRING_CONVERSION_FLAG
-- Performing Test C_SUPPORTS_STRING_CONVERSION_FLAG - Success
-- Performing Test CXX_SUPPORTS_STRING_CONVERSION_FLAG
-- Performing Test CXX_SUPPORTS_STRING_CONVERSION_FLAG - Success
-- Performing Test LINKER_SUPPORTS_COLOR_DIAGNOSTICS
-- Performing Test LINKER_SUPPORTS_COLOR_DIAGNOSTICS - Failed
-- Looking for os_signpost_interval_begin
-- Looking for os_signpost_interval_begin - not found
-- Found Python3: /usr/bin/python3.8 (found version "3.8.2") found components: Interpreter
-- Constructing LLVMBuild project information
-- Linker detection: GNU Gold
-- Found Git: /usr/bin/git (found version "2.25.1")
-- Targeting AArch64
-- Targeting AMDGPU
-- Targeting ARM
-- Targeting AVR
-- Targeting BPF
-- Targeting Hexagon
-- Targeting Lanai
-- Targeting Mips
-- Targeting MSP430
-- Targeting NVPTX
-- Targeting PowerPC
-- Targeting RISCV
-- Targeting Sparc
-- Targeting SystemZ
-- Targeting WebAssembly
-- Targeting X86
-- Targeting XCore
-- default linker set to "gold"
-- Performing Test C_SUPPORTS_CF_PROTECTION_BRANCH
-- Performing Test C_SUPPORTS_CF_PROTECTION_BRANCH - Success
-- Performing Test SPLIT_STACK_FUNCTIONAL
-- Performing Test SPLIT_STACK_FUNCTIONAL - Success
-- starting libgo configuration.
-- Performing Test HAVE_ATOMIC_FUNCTIONS
-- Performing Test HAVE_ATOMIC_FUNCTIONS - Success
-- Looking for clock_gettime
-- Looking for clock_gettime - found
-- Looking for strnlen
-- Looking for strnlen - found
-- Looking for dl_iterate_phdr
-- Looking for dl_iterate_phdr - found
-- Looking for fcntl
-- Looking for fcntl - found
-- Looking for getexecname
-- Looking for getexecname - not found
-- Looking for lstat
-- Looking for lstat - found
-- Looking for readlink
-- Looking for readlink - found
-- Looking for mmap
-- Looking for mmap - found
-- Looking for accept4
-- Looking for accept4 - found
-- Looking for dup3
-- Looking for dup3 - found
-- Looking for epoll_create1
-- Looking for epoll_create1 - found
-- Looking for faccessat
-- Looking for faccessat - found
-- Looking for fallocate
-- Looking for fallocate - found
-- Looking for fchmodat
-- Looking for fchmodat - found
-- Looking for fchownat
-- Looking for fchownat - found
-- Looking for futimesat
-- Looking for futimesat - found
-- Looking for inotify_add_watch
-- Looking for inotify_add_watch - found
-- Looking for inotify_init
-- Looking for inotify_init - found
-- Looking for inotify_init1
-- Looking for inotify_init1 - found
-- Looking for inotify_rm_watch
-- Looking for inotify_rm_watch - found
-- Looking for listxattr
-- Looking for listxattr - found
-- Looking for mincore
-- Looking for mincore - found
-- Looking for mkdirat
-- Looking for mkdirat - found
-- Looking for openat
-- Looking for openat - found
-- Looking for removexattr
-- Looking for removexattr - found
-- Looking for renameat
-- Looking for renameat - found
-- Looking for setxattr
-- Looking for setxattr - found
-- Looking for splice
-- Looking for splice - found
-- Looking for sync_file_range
-- Looking for sync_file_range - found
-- Looking for syscall
-- Looking for syscall - found
-- Looking for tee
-- Looking for tee - found
-- Looking for unlinkat
-- Looking for unlinkat - found
-- Looking for unsetenv
-- Looking for unsetenv - found
-- Looking for unshare
-- Looking for unshare - found
-- Looking for utimensat
-- Looking for utimensat - found
-- Looking for wait4
-- Looking for wait4 - found
-- Looking for open64
-- Looking for open64 - found
-- Looking for mknodat
-- Looking for mknodat - found
-- Looking for pipe2
-- Looking for pipe2 - found
-- Looking for memmem
-- Looking for memmem - found
-- Looking for inttypes.h
-- Looking for inttypes.h - found
-- Looking for linux/ether.h
-- Looking for linux/ether.h - not found
-- Looking for linux/filter.h
-- Looking for linux/filter.h - found
-- Looking for linux/fs.h
-- Looking for linux/fs.h - found
-- Looking for linux/if_addr.h
-- Looking for linux/if_addr.h - found
-- Looking for linux/if_ether.h
-- Looking for linux/if_ether.h - found
-- Looking for linux/if_tun.h
-- Looking for linux/if_tun.h - found
-- Looking for linux/netlink.h
-- Looking for linux/netlink.h - found
-- Looking for linux/ptrace.h
-- Looking for linux/ptrace.h - found
-- Looking for linux/reboot.h
-- Looking for linux/reboot.h - found
-- Looking for linux/rtnetlink.h
-- Looking for linux/rtnetlink.h - found
-- Looking for memory.h
-- Looking for memory.h - found
-- Looking for net/if.h
-- Looking for net/if.h - found
-- Looking for net/if_arp.h
-- Looking for net/if_arp.h - found
-- Looking for net/route.h
-- Looking for net/route.h - found
-- Looking for netinet/icmp6.h
-- Looking for netinet/icmp6.h - found
-- Looking for netinet/if_ether.h
-- Looking for netinet/if_ether.h - found
-- Looking for netinet/in_systm.h
-- Looking for netinet/in_systm.h - found
-- Looking for netinet/ip.h
-- Looking for netinet/ip.h - found
-- Looking for netinet/ip_mroute.h
-- Looking for netinet/ip_mroute.h - not found
-- Looking for netpacket/packet.h
-- Looking for netpacket/packet.h - found
-- Looking for port.h
-- Looking for port.h - not found
-- Looking for sched.h
-- Looking for sched.h - found
-- Looking for semaphore.h
-- Looking for semaphore.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for stdlib.h
-- Looking for stdlib.h - found
-- Looking for strings.h
-- Looking for strings.h - found
-- Looking for sys/epoll.h
-- Looking for sys/epoll.h - found
-- Looking for sys/file.h
-- Looking for sys/file.h - found
-- Looking for sys/inotify.h
-- Looking for sys/inotify.h - found
-- Looking for sys/mount.h
-- Looking for sys/mount.h - found
-- Looking for sys/prctl.h
-- Looking for sys/prctl.h - found
-- Looking for sys/ptrace.h
-- Looking for sys/ptrace.h - found
-- Looking for sys/select.h
-- Looking for sys/select.h - found
-- Looking for sys/statfs.h
-- Looking for sys/statfs.h - found
-- Looking for sys/syscall.h
-- Looking for sys/syscall.h - found
-- Looking for sys/sysinfo.h
-- Looking for sys/sysinfo.h - found
-- Looking for sys/timex.h
-- Looking for sys/timex.h - found
-- Looking for sys/user.h
-- Looking for sys/user.h - found
-- Looking for sys/utsname.h
-- Looking for sys/utsname.h - found
-- Looking for sys/vfs.h
-- Looking for sys/vfs.h - found
-- Looking for syscall.h
-- Looking for syscall.h - found
-- Looking for utime.h
-- Looking for utime.h - found
-- Looking for compress in z
-- Looking for compress in z - found
-- Looking for stddef.h
-- Looking for stddef.h - found
-- Check size of double
-- Check size of double - done
-- Check size of long double
-- Check size of long double - done
-- Check size of long double
-- Check size of long double - done
-- Check size of void*
-- Check size of void* - done
-- Looking for alloca.h
-- Looking for alloca.h - found
-- Looking for alloca
-- Looking for alloca - not found
-- Looking for memcpy
-- Looking for memcpy - found
-- Performing Test HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4
-- Performing Test HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4 - Success
-- Performing Test HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8
-- Performing Test HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8 - Success
-- Performing Test HAVE_AS_X86_AES
-- Performing Test HAVE_AS_X86_AES - Success
-- Libgo: creating stdlib package targets
-- Libgo: generating check targets
-- libgo configuration complete.
-- starting gotools configuration.
-- gotools: generating check targets
-- gotools configuration complete.
-- Registering Bye as a pass plugin (static build: OFF)
-- Failed to find LLVM FileCheck
-- Version: 0.0.0
-- Performing Test HAVE_CXX_FLAG_STD_CXX11
-- Performing Test HAVE_CXX_FLAG_STD_CXX11 - Success
-- Performing Test HAVE_CXX_FLAG_WALL
-- Performing Test HAVE_CXX_FLAG_WALL - Success
-- Performing Test HAVE_CXX_FLAG_WEXTRA
-- Performing Test HAVE_CXX_FLAG_WEXTRA - Success
-- Performing Test HAVE_CXX_FLAG_WSHADOW
-- Performing Test HAVE_CXX_FLAG_WSHADOW - Success
-- Performing Test HAVE_CXX_FLAG_PEDANTIC
-- Performing Test HAVE_CXX_FLAG_PEDANTIC - Success
-- Performing Test HAVE_CXX_FLAG_PEDANTIC_ERRORS
-- Performing Test HAVE_CXX_FLAG_PEDANTIC_ERRORS - Success
-- Performing Test HAVE_CXX_FLAG_WSHORTEN_64_TO_32
-- Performing Test HAVE_CXX_FLAG_WSHORTEN_64_TO_32 - Success
-- Performing Test HAVE_CXX_FLAG_WFLOAT_EQUAL
-- Performing Test HAVE_CXX_FLAG_WFLOAT_EQUAL - Success
-- Performing Test HAVE_CXX_FLAG_FSTRICT_ALIASING
-- Performing Test HAVE_CXX_FLAG_FSTRICT_ALIASING - Success
-- Performing Test HAVE_CXX_FLAG_FNO_EXCEPTIONS
-- Performing Test HAVE_CXX_FLAG_FNO_EXCEPTIONS - Success
-- Performing Test HAVE_CXX_FLAG_WSTRICT_ALIASING
-- Performing Test HAVE_CXX_FLAG_WSTRICT_ALIASING - Success
-- Performing Test HAVE_CXX_FLAG_WD654
-- Performing Test HAVE_CXX_FLAG_WD654 - Failed
-- Performing Test HAVE_CXX_FLAG_WTHREAD_SAFETY
-- Performing Test HAVE_CXX_FLAG_WTHREAD_SAFETY - Success
-- Performing Test HAVE_THREAD_SAFETY_ATTRIBUTES
-- Performing Test HAVE_THREAD_SAFETY_ATTRIBUTES
-- Performing Test HAVE_THREAD_SAFETY_ATTRIBUTES -- failed to compile
-- Performing Test HAVE_CXX_FLAG_COVERAGE
-- Performing Test HAVE_CXX_FLAG_COVERAGE - Success
-- Performing Test HAVE_GNU_POSIX_REGEX
-- Performing Test HAVE_GNU_POSIX_REGEX
-- Performing Test HAVE_GNU_POSIX_REGEX -- failed to compile
-- Performing Test HAVE_POSIX_REGEX
-- Performing Test HAVE_POSIX_REGEX
-- Performing Test HAVE_POSIX_REGEX -- success
-- Performing Test HAVE_STEADY_CLOCK
-- Performing Test HAVE_STEADY_CLOCK
-- Performing Test HAVE_STEADY_CLOCK -- success
-- Configuring done
CMake Error at tools/gollvm/libgo/CMakeLists.txt:487 (add_library):
Cannot find source file:

/home/ubuntu/workarea/llvm-project/llvm/tools/gollvm/gofrontend/libgo/go/golang.org/x/sys/cpu/cpu_gccgo.c

Tried extensions .c .C .c++ .cc .cpp .cxx .cu .m .M .mm .h .hh .h++ .hm
.hpp .hxx .in .txx

CMake Error at tools/gollvm/libgo/CMakeLists.txt:487 (add_library):
No SOURCES given to target: libgo_c_piclib

CMake Error at tools/gollvm/libgo/CMakeLists.txt:496 (add_library):
No SOURCES given to target: libgo_c_nonpiclib

CMake Generate step failed. Build files cannot be regenerated correctly.

I haven't encountered this issue before. Maybe there where some deletions, like in case of #32381.

Ivan