Re: Building without Emacs malloc, possible?

["Jan Djärv" <jan.h.d@swipnet.se>]

Eli Zaretskii skrev:
>> Date: Wed, 21 Feb 2007 21:31:17 +0100
>> From: =?ISO-8859-1?Q?Jan_Dj=E4rv?= <jan.h.d@swipnet.se>
>>
>> What is the status of building without Emac malloc?  There are some problems 
>> on cygwin + Gtk.  Basically Gtk+ (glib actually) calls memalign, but on cygwin 
>> this does not call the Emacs supplied memalign, but cygwins own.  Since malloc 
>> is the one Emacs has, cygwin memalign refuses to work.  I don't know why the 
>> Emace memalign is not called, dynamic libraries on W32 seems to behave strange 
>> in this regard.
> 
> That is very unfortunate.  Using system malloc will cause Emacs to
> grow in its footprint much more than it does with gmalloc, possibly an
> unlimited growth.  Did you try asking for advice on the Cygwin mailing
> list?

Yes, the advice was that Emacs should not use its own malloc in this case.  If 
that works, I'll add a configure check so that Emacs uses its own malloc on 
cygwin except when Gtk+ is used.  I still don't understand why the Emacs 
supplied memalign doesn't get called.

> 
>> One solution would be for Emacs to not use its own malloc, but that gives 
>> compilation errors.  I don't have the errors here, but they are unresolved 
>> symbols in vm-limit.c.
>>
>> So, the question is what is need to compile on cygwin without Emacs malloc? I 
>> just added
>>
>> #define SYSTEM_MALLOC
>>
>> to s/cygwin.h.  Apparently something more is needed.
> 
> Defining SYSTEM_MALLOC ought to be enough.  What errors do you see?
> Do the same errors happen when you try building with SYSTEM_MALLOC on
> GNU/Linux?
> 
> Btw, I think you need to "make distclean" and reconfigure after adding
> SYSTEM_MALLOC; maybe you didn't, and that's the reason for the
> problems?

I'll try again with that when I get access to the w32 machine again.  Thanks 
for the advice.

	Jan D.