gpg compiles and runs fine on OS X 10.2.6 and HP/UX 11.11: Darwin localhost 6.6 Darwin Kernel Version 6.6: Thu May 1 21:48:54 PDT 2003; root:xnu/xnu-344.34.obj~1/RELEASE_PPC Power Macintosh powerpc HP-UX localhost B.11.11 U 9000/800 3205973212 unlimited-user license -- PGP Fingerprint: 886F 6A8A 68A1 5E90 EF3F 8EFA E2B8 3F99 7343 C1E3