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D.gnu - GDC for ARM MacOS / OSX

reply Cecil Ward <cecil cecilward.com> writes:
https://forum.dlang.org/post/mjnbswzizylffjyrigpw forum.dlang.org

On Thursday, 29 June 2023 at 17:16:42 UTC, Cecil Ward wrote:

 On Thursday, 29 June 2023 at 09:18:19 UTC, Iain Buclaw wrote:

 On Thursday, 29 June 2023 at 05:27:57 UTC, Cecil Ward wrote:

 I tried getting GCC on my ARM M2 Mac using the homebrew 
 package manager, which is how I got LDC. It gave me C++ and C 
 and FORTRAN, but no sign of any GDC.


 How is GCC available when it has no support for 
 aarch64-darwin2x?

 (Experimental support is available in [iains fork on 
 github](https://github.com/iains/gcc-darwin-arm64) targeting 
 the 14.x development branch)

 Iain and I have been going through arm64-darwin support in D 
 run-time, mostly it's just getting cross bootstrap from gcc-11 
 done cleanly.  Nothing that I expect to be made concretely 
 available just yet, though I am hoping that GCC will finally 
 get support for M1/M2 by the time 14.1 is released in May 
 though.


 Thankyou for your good work Iain. I don’t have a working GDC as 
 the one on my Raspberry Pi AAarch64 Debian Buster dies with an 
 error message ever time you try to compile. I have run GDC on 
 32-bit ARM on the Raspberry Pi and in godbolt.org on x86-64.

 I will get hold of an x86-64 box with Linux on it. Get round 
 the problems that way.


If I understand Iain’s reply correctly, the showstopper was lack 
of support for AArch64 / MacOS in GCC at the time. Has that 
situation improved by now ?

If the situation now makes either downloading or building GDC / 
AArch64 / MacOS from sources possible, would someone be kind 
enough to knock up a shell script for me ?

NB I do have a working GDC/Linux on an x86/64 box now, so I can 
compile D programs on that machine, with GDC, and also to AArch64 
using LDC on my Mac M2 machine.
Aug 22
parent reply Iain Buclaw <ibuclaw gdcproject.org> writes:
On Thursday, 22 August 2024 at 16:56:06 UTC, Cecil Ward wrote:

 If I understand Iain’s reply correctly, the showstopper was 
 lack of support for AArch64 / MacOS in GCC at the time. Has 
 that situation improved by now ?

 If the situation now makes either downloading or building GDC / 
 AArch64 / MacOS from sources possible, would someone be kind 
 enough to knock up a shell script for me ?

 NB I do have a working GDC/Linux on an x86/64 box now, so I can 
 compile D programs on that machine, with GDC, and also to 
 AArch64 using LDC on my Mac M2 machine.


I haven't seen anything being posted or committed to GCC mainline 
around aarch64-darwin support. Despite getting emails of recent 
activity coming from the fork in github, I suspect it won't be 
made available for review in time for the feature freeze in 
September/October.

If Iain S. is attending the Cauldron this year, I'll catch up 
with him in 3 weeks to find out where GCC support is at.

I know for at least the last two releases it's been possible to 
build GCC *on* a Mac M1/M2, just not *for* a Mac M1/M2.
Aug 22
parent Cecil Ward <cecil cecilward.com> writes:
On Thursday, 22 August 2024 at 17:34:58 UTC, Iain Buclaw wrote:

 On Thursday, 22 August 2024 at 16:56:06 UTC, Cecil Ward wrote:

 If I understand Iain’s reply correctly, the showstopper was 
 lack of support for AArch64 / MacOS in GCC at the time. Has 
 that situation improved by now ?

 If the situation now makes either downloading or building GDC 
 / AArch64 / MacOS from sources possible, would someone be kind 
 enough to knock up a shell script for me ?

 NB I do have a working GDC/Linux on an x86/64 box now, so I 
 can compile D programs on that machine, with GDC, and also to 
 AArch64 using LDC on my Mac M2 machine.


 I haven't seen anything being posted or committed to GCC 
 mainline around aarch64-darwin support. Despite getting emails 
 of recent activity coming from the fork in github, I suspect it 
 won't be made available for review in time for the feature 
 freeze in September/October.

 If Iain S. is attending the Cauldron this year, I'll catch up 
 with him in 3 weeks to find out where GCC support is at.

 I know for at least the last two releases it's been possible to 
 build GCC *on* a Mac M1/M2, just not *for* a Mac M1/M2.


Thanks.

A thought: Since I have an x86-64 box, could I cross-compile D 
programs for AArch64 output?  (This might sound a bit mad, but my 
aim is to look at the quality of the code generated by GDC vs 
LDC, and also to learn a AArch64 asm.) And I am a true D convert.

I would need the appropriate magic runes / switches for that kind 
of cross-code generation. Could someone perhaps help me with 
that? It would save me a lot of struggle.
Aug 24