27 Jun
2017
27 Jun
'17
1:54 p.m.
Browsing the source for "cc" in v6 and v7,
if invoked with -2 would
replace crt0.o with crt2.o. If the -2 were followed by another character
(probably intended to be -20), it would use crt20.o and use -l2 instead
of -lc.
These options seem to be undocumented, and I can't find any source code
of these libraries or indication as to what the purpose was.
The "scc" man page for System V may be enlightening, as it mentions
similarly-named files:
NAME
scc - C compiler for stand-alone programs
SYNOPSIS
scc [ +[ lib ] ] [ option ] ... [ file ] ...
DESCRIPTION
Scc prepares the named files for stand-alone execution.
[...]
FILES
/lib/crt2.o execution start-off
/usr/lib/lib2.a stand-alone library
/usr/lib/lib2A.a +A configuration library
/usr/lib/lib2B.a +B configuration library
-- Richard
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