Judging from various messages on the OpenSSL mailing lists, HP-UX 10

with cc (but not gcc) seems to work well with BN_LLONG; but -O4 is too
much.

Configure

@@ -155,8 +155,8 @@ my %table=(
 
 # 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:::",
-# If hpux10-cc fails, try this one:
-"hpux10-brokencc",	"cc:-DB_ENDIAN -DBN_DIV2W -Ae +ESlit +O4 -z::-D_REENTRANT::DES_PTR DES_UNROLL DES_RISC1:::",
+# If hpux10-cc fails, try this one (if still fails, try deleting BN_LLONG):
+"hpux10-brokencc",	"cc:-DB_ENDIAN -DBN_DIV2W -Ae +ESlit +O2 -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:::",
 # If hpux10-gcc fails, try this one:

TABLE

@@ -886,11 +886,11 @@ $rc5_obj      =
 
 *** hpux10-brokencc
 $cc           = cc
-$cflags       = -DB_ENDIAN -DBN_DIV2W -Ae +ESlit +O4 -z
+$cflags       = -DB_ENDIAN -DBN_DIV2W -Ae +ESlit +O2 -z
 $unistd       = 
 $thread_cflag = -D_REENTRANT
 $lflags       = 
-$bn_ops       = DES_PTR DES_UNROLL DES_RISC1
+$bn_ops       = BN_LLONG DES_PTR DES_UNROLL DES_RISC1
 $bn_obj       = 
 $des_obj      = 
 $bf_obj       =