[Scons-users] Mesa3D graphics library build failure when using Scons 3.0.3 and newer on Windows with Visual Studio 2017, Scons 3.0.1 is unaffected.

[Liviu Prodea]

 Yes, that hack works around it. Added Jose Fonseca from VMware to this discussion as he is familiar with Mesa3D scons build internals.


==================================================================    On Monday, February 25, 2019, 3:08:27 AM GMT+2, Bill Deegan <bill at baddogconsulting.com> wrote:  
 
 Finally got around to reproducing this.Setting up for a build is a bit complicated, I ended up having to comment out a couple lines in the build.cmd
o.k. Try this:comment out line 311 in mesascons/gallium.py    # env.Decider('MD5-timestamp')




On Tue, Feb 19, 2019 at 9:42 AM Bill Deegan <bill at baddogconsulting.com> wrote:

Curious. Those changes should only affect using MD5-timestamp decider..
I'll take a look.

On Tue, Feb 19, 2019 at 9:07 AM Liviu Prodea <liviuprodea at yahoo.com> wrote:

=================================================================================



Bisect is complete. I narrowed it down to 4 commits. Cannot go any further due to skipping of commits that don't even get at nir code base. Replay log is available here: https://bugs.freedesktop.org/attachment.cgi?id=143412
Affected commits attempt to generate src/compiler/nir/nir.h before  src/compiler/nir/nir_opcodes.h from their respective python sources which is obviously incorrect.
    On Monday, February 18, 2019, 8:32:34 PM GMT+2, Daniel Moody <dmoody256 at gmail.com> wrote:  
 
 Which commits did you bisect too? 
On Mon, Feb 18, 2019, 11:37 AM Bill Deegan <bill at baddogconsulting.com wrote:

nir_opcodes.h and any other file which are not present when needed are indeed relevant.They indicate what in the build logic is missing dependencies.If the dependencies were correct, then those files would be created/present before any file which depends on them is compiled..

-Bill

On Mon, Feb 18, 2019 at 1:15 AM Liviu Prodea <liviuprodea at yahoo.com> wrote:

 I am not a Mesa3D developer so I also filed a bug with them as well: https://bugs.freedesktop.org/show_bug.cgi?id=109443

I dug up a bit more now that I have Scons source code at hand. It appears that Scons 3.0.2 that has been pulled from pypi is also affected. I tried bisecting between rel_3.0.1 and rel_3.0.2 branches range but when I get close to finish, I end up with 2 commits that are completely broken and 1 with excessive debug that I don't know if it fails on same spot as master, rel_3.0.4, rel_3.0.3 or rel_3.0.2.



I don't think nir_opcodes.h is relevant because if I change the configuration (add off-screen rendering / build llvmpipe / other changes) it stumbles in other header file. Also if I keep retrying building after failure without cleaning it succeeds eventually after plenty of tries with failures in random header files so it makes progress.



========================================

   
 On Sunday, February 17, 2019, 10:30:43 PM GMT+2, Bill Deegan <bill at baddogconsulting.com> wrote:  
 
 what generates "'nir_opcodes.h" ?Is that output from bison/flex/some other code generator, or is that just a file which is checked into your tree?

On Sun, Feb 17, 2019 at 2:01 AM Liviu Prodea <liviuprodea at yahoo.com> wrote:

 I applied the patch and it succeeded in getting past configuration phase but the end result is the same as with Scons 3.0.4 release.

  
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