Just an extra comment.

Configure

@@ -413,19 +413,29 @@ my %table=(
 # Linux on ARM
 "linux-elf-arm","gcc:-DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall::-D_REENTRANT:::BN_LLONG::::::::::dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
 
+# SCO/Caldera targets.
+#
 # Originally we had like unixware-*, unixware-*-pentium, unixware-*-p6, etc.
 # Now we only have blended unixware-* as it's the only one used by ./config.
-# If you want to optimize for particular microarchitectire, bypass ./config
+# If you want to optimize for particular microarchitecture, bypass ./config
 # and './Configure unixware-7 -Kpentium_pro' or whatever appropriate.
+# Note that not all targets include assembler support. Mostly because of
+# lack of motivation to support out-of-date platforms with out-of-date
+# compiler drivers and assemblers. Tim Rice <tim@multitalents.net> has
+# patiently assisted to debug most of it.
 #
 # UnixWare 2.0x fails destest with -O.
 "unixware-2.0","cc:-DFILIO_H -DNO_STRINGS_H::-Kthread::-lsocket -lnsl -lresolv -lx:${x86_gcc_des} ${x86_gcc_opts}:::",
 "unixware-2.1","cc:-O -DFILIO_H::-Kthread::-lsocket -lnsl -lresolv -lx:${x86_gcc_des} ${x86_gcc_opts}:::",
 "unixware-7","cc:-O -DFILIO_H -Kalloca::-Kthread::-lsocket -lnsl:BN_LLONG MD2_CHAR RC4_INDEX ${x86_gcc_des}:${x86_elf_asm}:dlfcn:svr5-shared:-Kpic::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
 "unixware-7-gcc","gcc:-DL_ENDIAN -DFILIO_H -O3 -fomit-frame-pointer -m486 -Wall::-D_REENTRANT::-lsocket -lnsl:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:gnu-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
-# OpenUNIX 8
 "OpenUNIX-8","cc:-O -DFILIO_H -Kalloca::-Kthread::-lsocket -lnsl:BN_LLONG MD2_CHAR RC4_INDEX ${x86_gcc_des}:${x86_elf_asm}:dlfcn:svr5-shared:-Kpic::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
 "OpenUNIX-8-gcc","gcc:-O -DFILIO_H -fomit-frame-pointer::-pthread::-lsocket -lnsl:BN_LLONG MD2_CHAR RC4_INDEX ${x86_gcc_des}:${x86_elf_asm}:dlfcn:svr5-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
+"sco3-gcc",  "gcc:-O3 -fomit-frame-pointer -Dssize_t=int -DNO_SYS_UN_H::(unknown)::-lsocket:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:::", # the SCO assembler doesn't seem to like our assembler files ...
+# SCO 5 - Ben Laurie <ben@algroup.co.uk> says the -O breaks the SCO cc.
+"sco5-cc",  "cc:-belf::(unknown)::-lsocket -lresolv -lnsl:${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:svr3-shared:-Kpic",
+"sco5-gcc",  "gcc:-O3 -fomit-frame-pointer::(unknown)::-lsocket -lresolv -lnsl:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:svr3-shared:-fPIC",
+
 
 # IBM's AIX.
 "aix-cc",   "cc:-O -DB_ENDIAN -qmaxmem=16384::(unknown):AIX::BN_LLONG RC4_CHAR:::",
@@ -465,13 +475,6 @@ my %table=(
 "dgux-R4-gcc",	"gcc:-O3 -fomit-frame-pointer::(unknown)::-lnsl -lsocket:RC4_INDEX DES_UNROLL:::",
 "dgux-R4-x86-gcc",	"gcc:-O3 -fomit-frame-pointer -DL_ENDIAN::(unknown)::-lnsl -lsocket:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}",
 
-# SCO 3 - Tim Rice <tim@multitalents.net>
-"sco3-gcc",  "gcc:-O3 -fomit-frame-pointer -Dssize_t=int -DNO_SYS_UN_H::(unknown)::-lsocket:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:::", # the SCO assembler doesn't seem to like our assembler files ...
-
-# SCO 5 - Ben Laurie <ben@algroup.co.uk> says the -O breaks the SCO cc.
-"sco5-cc",  "cc:-belf::(unknown)::-lsocket -lresolv -lnsl:${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:svr3-shared:-Kpic",
-"sco5-gcc",  "gcc:-O3 -fomit-frame-pointer::(unknown)::-lsocket -lresolv -lnsl:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:svr3-shared:-fPIC",
-
 # Sinix/ReliantUNIX RM400
 # NOTE: The CDS++ Compiler up to V2.0Bsomething has the IRIX_CC_BUG optimizer problem. Better use -g  */
 "ReliantUNIX","cc:-KPIC -g -DTERMIOS -DB_ENDIAN::-Kthread:SNI:-lsocket -lnsl -lc -L/usr/ucblib -lucb:BN_LLONG DES_PTR DES_RISC2 DES_UNROLL BF_PTR::::::::::dlfcn:reliantunix-shared:::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",