Re: Porting gcj to i386-darwin

[Andrew Haley <aph at redhat dot com>]

Sandro Tolaini writes:
 > 
 > On 10/mar/2006, at 20:42, Tom Tromey wrote:
 > 
 > > libffi and mudflap were covered by Paolo and Andrew.
 > 
 > I have done some work on sysv.S and now libffi compiles fine on OSX/ 
 > Intel. Unfortunately, I had to put some #ifdef __APPLE__ this file  
 > because Apple ships an old cctools with as that doesn't understand  
 > some directives. My patch works on the 4.0 branch, I tried it on the  
 > 4.2 branch but libffi has changed in such a way that compiling it  
 > with the Apple as is not easily feasible (and I don't chew enough  
 > assembly code to change it).

You need to build everything from the same branch: gcc, libffi,
everything.  Don't use some other compiler.

 > > For libjava some porting may be required, though it shouldn't be very
 > > much.
 > 
 > libjava compiled out-of-the-box after tweaking the configure scripts.  
 > For boehm, I copied the one in the 4.2 branch and applied a patch  
 > that Hans should have already put in the current CVS version.
 > 
 > > For best results you will want to make sure that the code to turn
 > > signals into exceptions works properly.  This is both OS- and
 > > architecture dependent.  I haven't looked at the x86 darwin port,
 > > perhaps some gcc hacking is required.
 > 
 > How can I try this? Is there some test case I can use?

To begin with, don't worry about it.  You can have a fully-working
port without handling these traps, because we have default fallback
code for memory accesses and divides.

Andrew.