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From: elev26@castle.ed.ac.uk (Gerard A. Allan)
Newsgroups: comp.lang.c++
Subject: ET++ and g++
Message-ID: <7321@castle.ed.ac.uk>
Date: 26 Nov 90 12:08:49 GMT
Sender: elev26@castle.ed.ac.uk
Organization: Edinburgh Microfabrication Facility
Lines: 79

I have compiled et++2.0 on a sun3 4.0 using g++1.37.1 after a little effort.

There are still a number of problems. I had to solve the following
problems to get Et++ up and running applications. They maybe of interest
to anyone else attempting a port to g++. 


Applyed  the patches posted by Ron Guilmette (comp.lang.c++)
used makefile from tom@tnosoes.izf.tno.nl (Tom Vijlbrief) (comp.lang.c++)
compiled without POSTSCRIPT PIC PICT XSERVER NEWS SERVER 

I applied the following script to all *.C files. A few #pragma vtables
where errors but these were easily spotted by compiler.

*******************************
for i do
sed -e "s/\\$/\$,/g" < $i | awk -F, 'BEGIN{print "#ifdef __GNUG__ "}
{if ($1 == "//$") {
for(f=2;f<=NF-1;f++){
printf("#pragma vtable \"%s\"\n",$f)
}
}
}END{print "#endif"}'|sed -e "s/\\$//g" > addfile
cat addfile $i > newfile
mv newfile $i 
done
***********************

Compile with the +e2 option. This is supposed to reduce the
resultant code size. (does it ? and does it introduce any problems ?).

1) with -g -fminimal-debug the gcc-ld++ crashed.

I had to compile without debugging info then recompile files of interest
with -g -fminimal-debug  to get some debugging.

2) I had problems with the system valloc (seg in pw_open). I replaced the
memory allocation routines with those in malloc.c from the g++ src
directory. This solved the problem.

this new malloc aborted in new char[1] of ostream::ostream  I fixed this
by adding in char *malloc(int n)
if (n<=8) n=32; (YUK!!!!).
obviously something is going on that needs properly sorted.

3) got seg violations in Object::ClassName. The problem here seemed to
be that IsA returns  0 from Root::IsA.

reconfigured without PROGENV removed this problem. (has anyone seem
and/or solved this problem).

4)  problem with StaticTextView::Fit called Difference (Rectangle.C) 
3rd arg got trashed to 0x0 (maybe a compiler bug ????) 

	int n= Difference(r,contentRect.Expand(Point(4,0)),
		Rectangle(newOrigin,newExtent));
replaced with 
	
	Rectangle temp1= Rectangle(newOrigin,newExtent);
	// expanded by 4,0 to remove the caret too
	Rectangle temp2= contentRect.Expand(Point(4,0));
	int n= Difference(r,temp2,temp1);
solved problem.

5) seg violation in ClipBoard::~ClipBoard
this was due to SafeDelete (Types.h) when defined as if(p) { delete p ; p=0}
problem solved.

-----
As a result I can now run a number of applications: hello twoview micky
etc. I would like to get the PROGENV working. Has anyone had any
success with this and how did you do it. 

Gerard A. Allan                                 | Post:  EMF
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