s '--coflags=-O2 -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS  -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -fasynchronous-unwind-tables -fstack-clash-protection -fwrapv -D_FILE_OFFSET_BITS=64 -Wno-unused' --cpicflags=-fPIC --sharedbde=yes --sharedcompiler=yes --native-default-backend --customgmp=no --customlibuv=no --strip=no --configureinfo=yes
Checking local configuration...
executing ./autoconf/os -> linux
executing ./autoconf/cpu -> riscv64
executing ./autoconf/osversion -> 5.5.0-0.rc5.git0.1.1.riscv64.fc32.riscv64
executing ./autoconf/user -> mockbuild
executing ./autoconf/cctest -> gcc
executing ./autoconf/alignment -> 3
executing ./autoconf/ascpp -> gcc -c -x assembler-with-cpp
executing ./autoconf/arflags -> qc
executing ./autoconf/ranlib -> yes
executing ./autoconf/strip -> true
executing ./autoconf/thread -> -DGC_LINUX_THREADS -D_REENTRANT -DGC_THREADS -DNO_HANDLE_FORK -DTHREAD_LOCAL_ALLOC -DFINALIZE_ON_DEMAND -O2 -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -fasynchronous-unwind-tables -fstack-clash-protection -fwrapv -D_FILE_OFFSET_BITS=64 -Wno-unused
executing ./autoconf/pthread -> -lpthread
executing ./autoconf/pthreadlock -> 1
executing ./autoconf/pthreadspinlock -> 1
executing ./autoconf/pthreadmutexrec -> 1
executing ./autoconf/pthreadcondvtimedwait -> 1
executing ./autoconf/pthreadtimedjoin -> 1
executing ./autoconf/pthreadlocalstorage -> __thread
executing ./autoconf/pthreadkill -> PTHREAD_KILL
executing ./autoconf/nbprocs -> 4
executing ./autoconf/semaphore -> 1
executing ./autoconf/lockf -> 1
executing ./autoconf/gcflags -> -DNO_DEBUGGING -Iinclude -Ilibatomic_ops-install/include -DATOMIC_UNCOLLECTABLE -DNO_EXECUTE_PERMISSION
executing ./autoconf/maemo.arm -> no
+ Installing custom GC (gc-8.0.4) source code.
executing ./autoconf/config.guess -> 
+ Configuring custom GC (gc-8.0.4)...
./config.guess: unable to guess system type
This script, last modified 2014-11-04, has failed to recognize
the operating system you are using. It is advised that you
download the most up to date version of the config scripts from
  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
and
  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD
If the version you run (./config.guess) is already up to date, please
send the following data and any information you think might be
pertinent to <config-patches@gnu.org> in order to provide the needed
information to handle your system.
config.guess timestamp = 2014-11-04
uname -m = riscv64
uname -r = 5.5.0-0.rc5.git0.1.1.riscv64.fc32.riscv64
uname -s = Linux
uname -v = #1 SMP Mon Jan 6 17:31:22 UTC 2020
/usr/bin/uname -p = riscv64
/bin/uname -X     = 
hostinfo               = 
/bin/universe          = 
/usr/bin/arch -k       = 
/bin/arch              = riscv64
/usr/bin/oslevel       = 
/usr/convex/getsysinfo = 
UNAME_MACHINE = riscv64
UNAME_RELEASE = 5.5.0-0.rc5.git0.1.1.riscv64.fc32.riscv64
UNAME_SYSTEM  = Linux
UNAME_VERSION = #1 SMP Mon Jan 6 17:31:22 UTC 2020
configure: error: cannot guess build type; you must specify one
configure gc fail, see configure.log file.
error: 
RPM build errors:
Bad exit status from /var/tmp/rpm-tmp.i21VjJ (%build)
    Bad exit status from /var/tmp/rpm-tmp.i21VjJ (%build)
Child return code was: 1
EXCEPTION: [Error()]
Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/mockbuild/trace_decorator.py", line 95, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.8/site-packages/mockbuild/util.py", line 746, in do_with_status
    raise exception.Error("Command failed: \n # %s\n%s" % (command, output), child.returncode)
mockbuild.exception.Error: Command failed: 
 # bash --login -c /usr/bin/rpmbuild -bb --target riscv64 --nodeps /builddir/build/SPECS/bigloo.spec