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From:	Juan Manuel Guerrero <juan DOT guerrero AT gmx DOT de>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: building libc (was "Re: ANNOUNCE: DJGPP port of Lua 5.2.0 uploaded.")
Date:	Fri, 30 Dec 2011 05:49:41 -0800 (PST)
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On 28 Dez., 05:08, Rugxulo <rugx DOT  DOT  DOT  AT gmail DOT com> wrote:
[snip]
> > Before you start compiling you
> > must copy djgpp.djl and dxe.ld from the cvs /lib directory into your
> > djgpp installation /lib directory.  If this is not done the
> > compilation will abort when compiling symify.
>
> Wouldn't this be a good use for UPDATE.EXE (to automate it) when
> building?

That is a design question that must be answered by DJ and not by me.
But replacing the original files with the new ones may not be what
the user intends.


> > I do not understand all this.  Probably DOSEMU is not the best
> > emulator to compile the sources.  But I do not know.  I do not
> > remember if it was DOSEMU or DOSBOX but my experience with those
> > emulators was disapointing so I returned to VMware.  I am not
> > lobbying for it.  It is the one I use in my day-time job, so
> > I am most familiar with it than with the other ones.
>
> Well, to keep things simple, I (barely) try not to fiddle with ten
> bazillion different versions of the same thing. So hence I've never
> fiddled with VMware.
>
> I know DOSBox is completely unsuitable for compilation, though.

You do not need VMware.  I have installed VirtualBox 4.1.4 on my
linux box and it is possible to compile djgpp's sources out-of-the-
box.
Virtual Box allows to use VWmare virtual disks so I was able to
compare both solutions.
1) MS-DOS 6.22
   XMS = 64MB
   disk cache = 16MB
   LFN support disabled
   Compile time = 16 minutes.
2) MS-DOS 6.22
   XMS = 64MB
   disk cache = 16MB
   LFN support enabled
   Compile time = 30 minutes.
3) FreeDOS 1.0
   XMS = 64MB
   LFN support disabled
   Compile time = 21 minutes.
4) FreeDOS 1.0
   XMS = 64MB
   LFN support enabled
   Compile time = 30 minutes.

DosEMU does not work at all my linux box.  It always crashes and tells
me to download the sources and recompile it with certain debug flags
set.  The output produced from that debug version shall be send to the
maintainers.  That is to mutch work and makes dosemu useless for
current
linux versions.  I have also installed debian 6.0.3.  debian seems no
longer to provide dosemu at all.  It still prevides dosbox and
virtualbox.

According to my experience, with virtualbox we have an open source
virtual
system that allows to compile the libc sources and also other djgpp
sources
with and without LFN support.


Regards,
Juan M. Guerrero

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