procenv.c:1:0: error: -fstack-protector not supported for this target [-Werror] That's on HPPA, which does not support -fstack-protector. That is normally just a warning, but the procenv build system additionally sets -Werror, so it's turned into an error.
Fixed without revision bump. A proper fix that upstream should accept would probably involve leaving -Werror removed and testing for -fstack-protector in configure instead of in src/Makefile.am.