12.1.0 ./enc/unicode/12.1.0/casefold.h ./enc/unicode/12.1.0/name2ctype.h 
./miniruby -I./lib -I. -I.ext/common  ./tool/generic_erb.rb -c -o encdb.h ./template/encdb.h.tmpl ./enc enc
miniruby: thread_pthread.c:1995: rb_sigwait_fd_put: Assertion `old == th' failed.
make: *** [uncommon.mk:1033: encdb.h] Aborted
make: *** Waiting for unfinished jobs....
./miniruby -I./lib -I. -I.ext/common  ./tool/mkconfig.rb \
        -arch=riscv64-linux -version=2.6.6 \
        -install_name=ruby26 \
        -so_name=ruby26 \
        -unicode_version=12.1.0 \
        -unicode_emoji_version=12.0 \
> rbconfig.tmp
./tool/ifchange "--timestamp=.rbconfig.time" rbconfig.rb rbconfig.tmp
rbconfig.rb ESC[31;1mupdatedESC[m
 * ERROR: dev-lang/ruby-2.6.6-r3::ruby-kit failed (compile phase):
 *   emake failed