to produce PIC... -fPIC -DPIC
js/src/ctypes/libffi> checking if c++ PIC flag -fPIC -DPIC works... yes
js/src/ctypes/libffi> checking if c++ static flag -static works... no
js/src/ctypes/libffi> checking if c++ supports -c -o file.o... yes
js/src/ctypes/libffi> checking if c++ supports -c -o file.o... (cached) yes
js/src/ctypes/libffi> checking whether the c++ linker (ld) supports shared libraries... yes
js/src/ctypes/libffi> checking dynamic linker characteristics... (cached) GNU/Linux ld.so
js/src/ctypes/libffi> checking how to hardcode library paths into programs... immediate
js/src/ctypes/libffi> checking size of size_t... 8
js/src/ctypes/libffi> checking for C compiler vendor... gnu
js/src/ctypes/libffi> checking whether C compiler accepts -fstrict-aliasing... yes
js/src/ctypes/libffi> checking whether C compiler accepts -ffast-math... yes
js/src/ctypes/libffi> checking for gcc architecture flag... 
js/src/ctypes/libffi> checking for gcc architecture flag... unknown
js/src/ctypes/libffi> checking whether C compiler accepts -O3 -fomit-frame-pointer -fstrict-aliasing -ffast-math... yes
js/src/ctypes/libffi> checking CFLAGS for maximum warnings... -Wall
js/src/ctypes/libffi> checking whether to enable maintainer-specific portions of Makefiles... no
js/src/ctypes/libffi> checking sys/mman.h usability... yes
js/src/ctypes/libffi> checking sys/mman.h presence... yes
js/src/ctypes/libffi> checking for sys/mman.h... yes
js/src/ctypes/libffi> checking for mmap... yes
js/src/ctypes/libffi> checking for sys/mman.h... (cached) yes
js/src/ctypes/libffi> checking for mmap... (cached) yes
js/src/ctypes/libffi> checking whether read-only mmap of a plain file works... yes
js/src/ctypes/libffi> checking whether mmap from /dev/zero works... yes
js/src/ctypes/libffi> checking for MAP_ANON(YMOUS)... yes
js/src/ctypes/libffi> checking whether mmap with MAP_ANON(YMOUS) works... yes
js/src/ctypes/libffi> configure: error: "libffi has not been ported to riscv64-unknown-linux-gnu."
*** Fix above errors and then restart with\
               "make -f client.mk build"
make[5]: Leaving directory '/builddir/build/BUILD/esc-1.1.1/esc/src/xulrunner/xulrunner-45.9.0/firefox-45.9.0esr'
BUILDSTDERR: make[5]: *** [/builddir/build/BUILD/esc-1.1.1/esc/src/xulrunner/xulrunner-45.9.0/firefox-45.9.0esr/client.mk:361: configure] Error 1
make[4]: Leaving directory '/builddir/build/BUILD/esc-1.1.1/esc/src/xulrunner/xulrunner-45.9.0/firefox-45.9.0esr'
BUILDSTDERR: make[4]: *** [/builddir/build/BUILD/esc-1.1.1/esc/src/xulrunner/xulrunner-45.9.0/firefox-45.9.0esr/client.mk:373: /builddir/build/BUILD/esc-1.1.1/esc/src/xulrunner/xulrunner-45.9.0/firefox-45.9.0esr/objdir/Makefile] Error 2
make[3]: Leaving directory '/builddir/build/BUILD/esc-1.1.1/esc/src/xulrunner/xulrunner-45.9.0/firefox-45.9.0esr'
BUILDSTDERR: make[3]: *** [client.mk:171: build] Error 2
make[2]: Leaving directory '/builddir/build/BUILD/esc-1.1.1/esc/src/xulrunner'
BUILDSTDERR: make[2]: *** [Makefile:48: xulrunner-45.9.0/firefox-45.9.0esr/objdir] Error 2
make[1]: Leaving directory '/builddir/build/BUILD/esc-1.1.1/esc/src'
BUILDSTDERR: make[1]: *** [..//coreconf/rules.mk:111: libs] Error 2
BUILDSTDERR: make: *** [coreconf/rules.mk:111: libs] Error 2
RPM build errors:
BUILDSTDERR: error: Bad exit status from /var/tmp/rpm-tmp.kBESmf (%build)
BUILDSTDERR:     Macro expanded in comment on line 87: %define __prelink_undo_cmd %{nil}
BUILDSTDERR:     Bad exit status from /var/tmp/rpm-tmp.kBESmf (%build)
Child return code was: 1
EXCEPTION: [Error()]
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/mockbuild/trace_decorator.py", line 96, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.6/site-packages/mockbuild/util.py", line 626, in do
    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/esc.spec