=> Bootstrap dependency digest>=20010302: found digest-20190127
===> Building for picotrace-20190526
all ===> coredumper
rm -f .gdbinit
touch .gdbinit
#   compile  coredumper/coredumper.o
gcc -O2 -mieee -D_FORTIFY_SOURCE=2 -pthread   -std=gnu99   -Werror  -mieee   -I../common  -c    coredumper.c
coredumper.c:39:21: fatal error: threads.h: No such file or directory
compilation terminated.
*** Error code 1

Stop.
make[1]: stopped in /tmp/pkgbuild/devel/picotrace/work.alpha/picotrace-20190526/coredumper
*** Error code 1

Stop.
make: stopped in /tmp/pkgbuild/devel/picotrace/work.alpha/picotrace-20190526
*** Error code 1

Stop.
make[1]: stopped in /usr/pkgsrc/devel/picotrace
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/devel/picotrace