Mac OS X cross compiler

Mac OS X cross compiler

[Lucretia]

Hi,

I know some people here have built gnat for Mac and I'm wanting some advice on how to get it all built for Mac but as a cross compiler. The problem I have at the start is that binutils doesn't build ld and as for Mac and I cannot get any further.

Thanks,
Luke.

Re: Mac OS X cross compiler

[Simon Wright]

Lucretia <laguest9000@googlemail.com> writes:

> I know some people here have built gnat for Mac and I'm wanting some
> advice on how to get it all built for Mac but as a cross compiler. The
> problem I have at the start is that binutils doesn't build ld and as
> for Mac and I cannot get any further.

No, and building it on a Mac gets nowhere too.

Re: Mac OS X cross compiler

[Lucretia]

On Wednesday, 22 June 2016 18:55:35 UTC+1, Simon Wright  wrote:
> Lucretia <laguest9000@googlemail.com> writes:
> 
> > I know some people here have built gnat for Mac and I'm wanting some
> > advice on how to get it all built for Mac but as a cross compiler. The
> > problem I have at the start is that binutils doesn't build ld and as
> > for Mac and I cannot get any further.
> 
> No, and building it on a Mac gets nowhere too.

I know.

From having a look around, seems that you need to build ld64 and cctools and possible xar, and I think this is in place of binutils.

Re: Mac OS X cross compiler

[Lucretia]

On Wednesday, 22 June 2016 18:55:35 UTC+1, Simon Wright  wrote:

> No, and building it on a Mac gets nowhere too.

I know.

From having a look around, seems that you need to build ld64 and cctools and possible xar, and I think this is in place of binutils.

Re: Mac OS X cross compiler

[Luke A. Guest]

Simon Wright <simon@pushface.org> wrote:
>> for Mac and I cannot get any further.
> 
> No, and building it on a Mac gets nowhere too.
> 

Ok, found a port of the required tools, have all required tools now. GCC
4.9.2 still doesn't build, need to look into it more. It's the dread can't
work out object suffix error!

Just wanted to ask though, I don't need a multilib capable compiler anymore
right? Mac OS X is all 64 bit right?

Ta.

Re: Mac OS X cross compiler

[Simon Wright]

Luke A. Guest <laguest@archeia.com> writes:

> Just wanted to ask though, I don't need a multilib capable compiler
> anymore right? Mac OS X is all 64 bit right?

Not quite, but I wouldn't worry.

After some searching I found a 32-bit executable, and it still runs;

$ file /Applications/Hugin/Hugin.app/Contents/MacOS/Hugin
/Applications/Hugin/Hugin.app/Contents/MacOS/Hugin: Mach-O executable
i386

GNAT GPL 2016 has 6 fat binary libraries, all variants of libgcc.

The C compiler can produce a 32-bit executable:

$ which gcc
/opt/gnat-gpl-2016/bin/gcc
$ gcc hi.c
$ file a.out
a.out: Mach-O 64-bit executable x86_64
$ gcc hi.c -m32
$ file a.out
a.out: Mach-O executable i386

and the Ada compiler on its own can produce a 32-bit object:

$ gcc -c hello.adb -m32
$ file hello.o
hello.o: Mach-O object i386

but gnatmake won't:

$ gnatmake -c -u -f -m32 hello.adb 
gnatmake: RTS path not valid: missing adainclude and adalib directories