McStas installation and Perl

[Kristian Nielsen]

Dear Ron,

It was good to see you again at the ILL last week. Thanks for all your
work in organizing the workshop.

Last Tuesday, we discussed your problems with the location of the Perl
interpreter during the McStas install. We agreed that I should implement
a way for the user to explicitly set the path to Perl during the
installation.

Well, it turns out that this is already possible, I just did not realize
it! Before running the ./configure thing, the PERL environment variable
may be set to the complete path of the Perl executable to use:

    setenv PERL /my/special/perl
    ./configure --prefix=/my/prefix

The setting of PERL overrides configure's guess. It may be necessary to
remove configure's cache file,

    rm config.cache

I will document this in the INSTALL document and in the FAQ. Let me know
if you have any other trouble with this.

I will also be looking into the compiler warnings we discussed.

 - Kristian.