-# HPUX config. I've been building on HPUX 9, so the options may be
-# different on version 10.
-"hpux-cc", "cc:-DB_ENDIAN -D_HPUX_SOURCE -Aa -Ae +ESlit +O4 -Wl,-a,archive:(unknown)::DES_PTR DES_UNROLL DES_RISC1:::",
-##"hpux-kr-cc", "cc:-DB_ENDIAN -DNOCONST -DNOPROTO -D_HPUX_SOURCE:(unknown)::DES_PTR DES_UNROLL:::",
-"hpux-gcc", "gcc:-DB_ENDIAN -O3:(unknown)::BN_LLONG DES_PTR DES_UNROLL DES_RISC1:::",
-# HPUX from www.globus.org
-"hpux11-32bit-cc","cc:+DA2.0 -DB_ENDIAN -D_HPUX_SOURCE -Aa -Ae +ESlit:(unknown)::DES_PTR DES_UNROLL DES_RISC1:::",
-"hpux11-64bit-cc","cc:+DA2.0W -g -D_HPUX_SOURCE -Aa -Ae +ESlit:(unknown)::SIXTY_FOUR_BIT_LONG MD2_CHAR RC4_INDEX RC4_CHAR DES_UNROLL DES_RISC1 DES_INT :::",
+# HPUX 9.X config.
+# Don't use the bundled cc. It is broken. Use HP ANSI C if possible, or gcc.
+"hpux-cc", "cc:-DB_ENDIAN -DBN_DIV2W -Ae +ESlit +O4 -z:(unknown)::BN_LLONG DES_PTR DES_UNROLL DES_RISC1:::",
+"hpux-gcc", "gcc:-DB_ENDIAN -DBN_DIV2W -O3:(unknown)::BN_LLONG DES_PTR DES_UNROLL DES_RISC1:::",
+# HPUX 10.X config. Supports threads.
+"hpux10-cc", "cc:-DB_ENDIAN -DBN_DIV2W -Ae +ESlit +O4 -z:-D_REENTRANT::BN_LLONG DES_PTR DES_UNROLL DES_RISC1:::",
+"hpux10-gcc", "gcc:-DB_ENDIAN -DBN_DIV2W -O3:-D_REENTRANT::BN_LLONG DES_PTR DES_UNROLL DES_RISC1:::",
+# HPUX 11.X from www.globus.org.
+# Only works on PA-RISC 2.0 cpus, and not optimized. Why?
+"hpux11-32bit-cc","cc:+DA2.0 -DB_ENDIAN -D_HPUX_SOURCE -Aa -Ae +ESlit:-D_REENTRANT::DES_PTR DES_UNROLL DES_RISC1:::",
+"hpux11-64bit-cc","cc:+DA2.0W -g -D_HPUX_SOURCE -Aa -Ae +ESlit:-D_REENTRANT::SIXTY_FOUR_BIT_LONG MD2_CHAR RC4_INDEX RC4_CHAR DES_UNROLL DES_RISC1 DES_INT :::",