[...]

checking for pthread_condattr_setclock... yes
checking for pthread_sigmask... yes
checking for pthread_setname_np... yes
checking for pthread_set_name_np... no
checking for pthread_getattr_np... yes
checking arguments of pthread_setname_np... (pthread_self(), name)
checking if mcontext_t is a pointer... no
checking for getcontext... yes
checking for setcontext... yes
checking if fork works with pthread... yes
checking whether ELF binaries are produced... yes
checking for elf.h... yes
checking for elf_abi.h... no
checking for uncompress in -lz... yes
checking for mach-o/loader.h... no
checking whether OS depend dynamic link works... yes
checking for backtrace... yes
checking for broken backtrace... no
checking for valgrind/memcheck.h... no
checking for i686-tld-linux-strip... no
checking for strip... strip
checking whether -Wl,--no-undefined is accepted as LDFLAGS... yes
checking whether wrapper for LD_LIBRARY_PATH is needed... no
checking for __builtin_setjmp... yes with cast ()
checking for _setjmpex as a macro or function... no
checking for _setjmp as a macro or function... yes
checking for sigsetjmp as a macro or function... no
checking for setjmp type... __builtin_setjmp
checking for prefix of external symbols... NONE
checking for pthread.h... yes
checking if make is GNU make... make: error while loading shared libraries: libffi.so.6: cannot open shared object file: No such file or directory
no
checking for safe null command for make... configure: error: no candidate for safe null command
error: Bad exit status from /tmp/B.97g4feyi/BUILD/tmp/rpm-tmp.r2qI5C (%build)
RPM build errors:
    Macro expanded in comment on line 297: %{version},%{release} macros may not be used directly as they take last
    line 438: It's not recommended to have unversioned Obsoletes: Obsoletes:	ruby-json-rubyforge
    Bad exit status from /tmp/B.97g4feyi/BUILD/tmp/rpm-tmp.r2qI5C (%build)
ended at: Fri Feb 25 18:18:17 2022, done in 0:00:57.654102
error: No files produced.
+ chmod -R u+rwX /tmp/B.97g4feyi/BUILD
+ rm -rf /tmp/B.97g4feyi/tmp /tmp/B.97g4feyi/BUILD
+ rm -rf /tmp/B.97g4feyi
Begin-TLD-Builder-Info
Build-Time: user:31.11s sys:15.60s real:60.83s (faults io:0 non-io:2702344)
End-TLD-Builder-Info