Goetz Hoffart reports successful compile on HPUX/HPPA (on ngircd mailing list):
Target: hppa2.0w-hp-hpux11.11
Compiler: gcc
Compiler flags: -g -O2 -pipe -W -Wall -Wpointer-arith -Wstrict-prototypes -fstack-protector -D_XOPEN_SOURCE_EXTENDED
-DSYSCONFDIR='"$(sysconfdir)"'
Libraries: -lz -lnsl
Syslog support: yes Enable debug code: no
zlib compression: yes IRC sniffer: no
Use TCP Wrappers: no Strict RFC mode: no
Zeroconf support: no IRC+ protocol: yes
IDENT support: no I/O backend: "poll()"
IPv6 protocol: no SSL support: no