From:	"AndrewJ" <luminous-is AT home DOT com>
Newsgroups:	comp.os.msdos.djgpp
References:	<39190753 DOT 529E894D AT st DOT com>
Subject:	Re: System function
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Date:	Wed, 10 May 2000 08:06:51 GMT
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>     I use a compiler composed of many subprograms: preprocessor,
> assembler, optimizer, peephole...
>     To use it simply I use a driver which call all the required programs
> with the right arguments and in the right order.
>     The problem I encounter is a line limit with the system function.
> Command lines executed by the driver seem to be truncated and make my
> driver disfunction in some case.
>
>     Any Idea about it ?

Well, I'm going to assume you're -not- talking about DJGPP, since the
optimization code is integrated directly into the compiler.  That leads me to
this question: why are you posting this in the DJGPP newsgroup?  It's a wee bit
off-topic.

Also assuming you are using DOS: DOS command lines have a maximum limit of 126
characters.  Anything longer is truncated.  This has to do with the part of the
program that stores the command line strings for the program (the PSP, Program
Segment Prefix).

As for solutions, there's a few things you might try.  Do your tools support
response files (files with command line directives in them that are read by the
appropriate application)?   What about reading options from environment
variables?  These are the big two I can think of.  If you can't use these, then
I recommend you either complain to the vendor about limited functionality, or
switch to a better/different compiler... like DJGPP maybe?  ;)  DJGPP has a few
special methods where it can give your programs basically unlimited length
command lines.

AndrewJ

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