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Re: SPAWN [message #8668 is a reply to message #7751]

Wed, 09 April 1997 00:00

Tim Patterson
Messages: 65
Registered: October 1995

Member

Nobuyuki Tasaka wrote:
>

>
> CALL_EXTERNAL (and LINKIMAGE also) is useful to link C routines
> but needs to change codes to be portable to other systems, say,
> from SunOS 4.1.3 to Solaris 2.5 or SGI etc. SPAWN is slow for
> parsing data but there is no fear of this kind of problem.

It is true that you will need to recompile your shareable
libray of C code for different platforms, but you have to
recompile your C code anyway. I am currently using the same
C and Fortran routines called from IDL on SunOS, Solaris, HP
and OSF machines (and I think they should also work on
an SGI platform). The only change I had to make was to get the
HP compiler to use the same naming convention as the otehr platforms
(and this is a compiler option).

It was also reasonably easy to port this to VMS. I think the SPAWN
routine may be harder to change for this OS, but that may not be
a problem.

> In my case, I'm transferring the main portion of data to memory
> map file by C routine, and this file is readable as a normal file
> for any other applications.
>
> My concern is how to use SPAWN for parsing list and errors from
> that C routine to IDL, data size of which are not so large.
>

I'm farid I've really avoided using SPAWN for this type of activity,
mainly because I nbeed the code to be more portable. I'll be interested
in seeing what otehr people have to say about using SPAWN in this
way though. I'm always willing to learn something new :)

Tim

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[Message index]

		SPAWN and reading from a socket? By: alpha on Thu, 16 January 1997 00:00
		Re: SPAWN and reading from a socket? By: alpha on Fri, 17 January 1997 00:00
		Re: SPAWN and reading from a socket? By: plugge on Fri, 17 January 1997 00:00
		Re: SPAWN By: Tim Patterson on Wed, 09 April 1997 00:00
		Re: SPAWN By: thompson on Wed, 09 April 1997 00:00
		Re: SPAWN By: Nobuyuki Tasaka on Wed, 09 April 1997 00:00
		Re: SPAWN By: Tim Patterson on Tue, 08 April 1997 00:00

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