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Re: Traces issue on DOS resolved

From: Tim Van Holder
Subject: Re: Traces issue on DOS resolved
Date: Wed, 15 Aug 2001 18:53:32 +0200

> It is so weird that there must be some simple explanation/solution.
> Maybe some `flush' is needed, etc.  I don't know.
> Try to reproduce within an sh script first.  Then try with system.
> Try adding `; ls -l $tmp' at the end of the system which invokes m4 etc.

I've tried a number of things: using $SHELL -c "blah"; writing the command
to a script, then running that script using system, ...  Nothing works -
traces.0 is created, but remains empty.
I believe this is related to the problem I had a while back where you
couldn't use FD 6 (or 4 or whatever) in autoconf, or autoupdate would fail
(for some reason, using certain FDs in a script run from a Perl script
gave EBADF: Bad file descriptor when trying to write to them).

I'm going to build a debugging version of m4 and see if I can work around
it there; if that doesn't work, I'll have to throw myself on the mercy of
the DJGPP Perl maintainer and hope (s)he can find the problem and fix it.
I can comfortably hack away at a Perl script, but hacking Perl's source
code is quite another kettle of fish.

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