| Re: IDL Bug? (Re: include files in IDL programs) [message #22496] |
Fri, 17 November 2000 00:00  |
dsreyn
Messages: 10
Registered: December 1999
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Junior Member |
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In article <MPG.147f134c4803b032989c87@news.frii.com>,
davidf@dfanning.com (David Fanning) writes:
> Doug Reynolds (dsreyn@ll.mit.edu) writes:
>
>> Agreed. However, since the Unix world allows file names to mix upper and
>> lower case, I believe this should be documented. The information on pp. 52-53
>> of the IDL 5.4 "Using IDL" manual makes no mention of case restrictions,
>> which implicitly suggests that anything goes.
>
> I looked up "automatic compilation" in the on-line help.
> Here is what I find:
>
> ************************************************************ *********
> Automatic Execution
>
> IDL automatically compiles and executes a user-written function or procedure
> when it is first referenced if:
>
> 1. The source code of the function is in the current working directory or
> in a directory in the IDL search path defined by the system variable !PATH.
> 2. The name of the file containing the function is the same as the
> function name suffixed by .pro or .sav. Under UNIX, the suffix should be in
> lowercase letters.
>
> Note - IDL is case-insensitive. However, for some operating systems, IDL only
> checks for the lowercase filename based on the name of the procedure or
> function. We recommend that all filenames be named with lowercase.
> ************************************************************ ******************
Well, that's certainly clear enough. It seems odd that they don't bother
to mention this in the printed manuals.
>>> It does this *specifically* so these programs will run on UNIX machines.
>>
>> I'm not sure what you mean here. In the case I presented, the effect it
>> has is that the routine does *not* run.
>
> I mean that in a case-sensitive OS, IDL would have no hope
> of finding filenames unless some convention were used. The
> convention it uses (the most sensible, it seems to me) is
> that filenames are in lowercase characters.
OK, now I see what you meant.
Doug
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