Re: [PATCH] Allow qualified filename (bar/foo) PATH searching.

[RVP <rvp%SDF.ORG@localhost>]

On Sun, 29 Sep 2024, tlaronde%kergis.com@localhost wrote:

> POSIX requires that PATH searching be done only if the identifier
> (aka "file") has no '/' (if it has, it is a "path").
>
> Allow searching qualified filenames, i.e. Resource Identifier,
> like dk/ctl, vect/in/dxf by setting an environment variable
> PATH_SEARCH_OPT with the setting 'Q' in the definition.

I like this proposal in general: it makes things like using multiple
compilers very convenient (w/o any PATH-fiddling).

Assuming the binaries/links are in /opt/compilers/bin (and that is in $PATH),
then:

$ gcc13/gcc ...
$ clang-18/cc ...

etc,... but, what should be done for: {base,dir}name(), {get,set}progname(),
and err*()/warn*()? And, of course, realpath() (add a `-m' to the binary?).

-RVP