external names

[cottrell at nbs-vms.ARPA]

/*
i wrote that funny external names can be mapped portably by an
assembly language file containing lines such as:

	from:	jmp	to

geoff kuenning responded that some assemblers use such mnemonix as
EQ or JP for unconditional jumps (not to mention u1108 J), and
therefore my asm module is not portable. agreed. however, names
such as SYS$SYSTEM are not likely to appear on the target system anyway.
what i meant was that the C code was portable, that the language
need not be changed to effect this mapping. i agree it's a pain to
do it this way but it works.
*/