[Mono-dev] SGEN support when cross compiling

[Bassam Tabbara]

Should it be a warning then? The runtime aborts after this error. The only workaround I've found so far is:

https://github.com/symform/mono/commit/fe5c582a1a2d241f368c86081b3cb7ea53994f51

And sgen is running well now with a cross compiled mono.

From: Rodrigo Kumpera <kumpera at gmail.com<mailto:kumpera at gmail.com>>
Date: Tuesday, August 27, 2013 8:58 AM
To: Bassam Tabbara <bassam at symform.com<mailto:bassam at symform.com>>
Cc: "mono-devel-list at lists.ximian.com<mailto:mono-devel-list at lists.ximian.com>" <mono-devel-list at lists.ximian.com<mailto:mono-devel-list at lists.ximian.com>>
Subject: Re: [Mono-dev] SGEN support when cross compiling

All this means is that the managed allocators won't be used.


On Mon, Aug 26, 2013 at 8:07 PM, Bassam Tabbara <bassam at symform.com<mailto:bassam at symform.com>> wrote:
I tried that and I run into the following error when I run mono:

sgen is not supported when using --with-tls=pthread

Looking at the code here:

https://github.com/mono/mono/blob/master/mono/metadata/sgen-gc.h#L990

Seems like pthread is only supported on darwin and windows. I'm cross compiling to linux with with-tls=pthread.

From: Rodrigo Kumpera <kumpera at gmail.com<mailto:kumpera at gmail.com>>
Date: Monday, August 26, 2013 5:01 PM

To: Bassam Tabbara <bassam at symform.com<mailto:bassam at symform.com>>
Cc: "mono-devel-list at lists.ximian.com<mailto:mono-devel-list at lists.ximian.com>" <mono-devel-list at lists.ximian.com<mailto:mono-devel-list at lists.ximian.com>>
Subject: Re: [Mono-dev] SGEN support when cross compiling

Configure with --thread=pthread


On Mon, Aug 26, 2013 at 7:36 PM, Bassam Tabbara <bassam at symform.com<mailto:bassam at symform.com>> wrote:
Thanks Rodrigo. Is there a trick then to bypass the __thread check during configuration?

./configure --host=armv5te-unknown-linux-gnueabi

Fails with:

configure: error: cannot run test program while cross compiling

I worked around it with the following:

https://github.com/symform/mono/commit/fe5c582a1a2d241f368c86081b3cb7ea53994f51

Do others not see this?

From: Rodrigo Kumpera <kumpera at gmail.com<mailto:kumpera at gmail.com>>
Date: Monday, August 26, 2013 4:30 PM
To: Bassam Tabbara <bassam at symform.com<mailto:bassam at symform.com>>
Cc: "mono-devel-list at lists.ximian.com<mailto:mono-devel-list at lists.ximian.com>" <mono-devel-list at lists.ximian.com<mailto:mono-devel-list at lists.ximian.com>>
Subject: Re: [Mono-dev] SGEN support when cross compiling

sgen works fine on ARM and so does cross compiling to it.


On Mon, Aug 26, 2013 at 6:19 PM, Bassam Tabbara <bassam at symform.com<mailto:bassam at symform.com>> wrote:
Hello,

I'm working in mono master, and it looks like sgen is not support when cross compiling. Sgen requiren with-tls=__thread and during configuration a check is made if __thread is functioning and that fails with the following error when cross compiling:

configure: error: cannot run test program while cross compiling
[

I can work around this but disable the check during configuration, but I'm now wondering whether anyone is using sgen on ARM platforms? Are you cross compiling for those platforms? I must be missing something simple here.

Thanks!
Bassam

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