Message-Id:	<199602221542.KAA21721@delorie.com>
From:	Emmanuel Bigler <bigler AT lpmo DOT univ-fcomte DOT fr>
Subject:	problems using -O optimizing level with djgpp v2
To:	djgpp AT delorie DOT com
Date:	Thu, 22 Feb 1996 16:46:17 +0100 (MET)
Mime-Version:	1.0

This is a short note about bugs compiling with -O in DJGPP version 2

This came from a discussion with W.D. Kirby wdkirby AT ix16 DOT ix DOT netcom DOT com
about compiling GNUPLOT with DJGPP V 2.

I tried to re-compile HP2XX, a HPGL-to-other format translator and
much smaller than gnuplot, using djgpp v2. Previously I had succeeded
in compiling HP2XX with djgpp v1.12 without trouble. Under djgpp v2
the program does not work if compiled with -O. With no optimization,
the executable works but hangs sometimes (not able to input multiple
files and view them successively on screen). However I know things
have changed in the GRX driver... and I did not update the code for all
Grx varibles and routines. But even with postcript paper output, the
program hangs when multiple input files have to be converted. 

An annoying thing is that the CNTRL-BREAK key cannot kill the program,
unlike with the previous 1.12 compiler.  
What feature did I miss in the compilation options etc..., if I want
to be able to stop the program with control-C or control-break like in
the previous release of DJGPP ?


-- 

Emmanuel BIGLER         
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Laboratoire de Physique et Metrologie des Oscillateurs
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