[GRASS5] g.html2man: perl location problem

[Eric G. Miller]

On Thu, Mar 01, 2001 at 04:45:07PM +0700, Justin Hickey wrote:
> Hi Markus
> 
> Markus Neteler wrote:
> > 
> > Hi all,
> > 
> > as the path to "perl" is hardcoded in
> > src/scripts/contrib/g.html2man/g.html2man
> > 
> > the command:
> >  gmake5 html
> > fails on several platforms (like CRAY where it is in
> > /opt/gnu/bin/perl
> > 
> > Today I have added the missding
> > PERL = @PERL@
> > into src/CMD/head/head.in
> > 
> > Can we utilize this? Maybe similar to the wrapper
> > line used for tcltkgrass?
> 
> Yes, perl has a similar method. The following is from the "Programming
> Perl" book:
> 
> #!/bin/sh -- #perl, to stop looping
> eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
>     if 0;
> 
> .. rest of perl script ...
> 
> It's strange but it seems to work for me. In this case you simply
> substitute maybe $GRASS_PERL for /usr/bin/perl.

s@/usr/bin/perl at perl@ in the above "eval 'exec ...'", then it shouldn't
matter where perl lives as long as it's in $PATH.  Some other techniques
are in "man perlrun".  One other, which may not always exist:

#! /usr/bin/env perl


-- 
Eric G. Miller <egm2 at jps.net>

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