🚀 go-pugleaf

I'm attempting a GCC-VMS port of code which seems to be targeted to Vax C.

If during the link phase the following references are undefined, 
where are they most likely to be found... ?

ADD_QUAD, MPY_QUAD, CVTUNIX2VMS, CVTVMS2UNIX

The interesting bit about CvtUnix2VMS and its converse was that
the #ifdef VMS's EXCLUDED the compilation of these functions ,
implying that they resided in libraries somewhere...

The Quadword operations are used in conjunction with utime() to
do unix time conversions.  I expect that VAX C just #defines
xxx_QUAD to some other math$blah$blah references, but so far,
snooping the libraries hasn't turned up any obvious hits.
(I suppose I should mention that we don't have VAX C or any of
it's attendant documentation; only GCC)
Also, why would a particular piece of code use _toupper()/_tolower
(i.e. underscores explicitly included in the source) when the
standard functions are usually under_score_less...  I ended up just
#define _toupper(x) toupper(x)...

thx, kk