[Scons-users] Possible 2.5.1 regression on Windows? (was: Unreliable build problem)

[Arvid Rosén]

Hi,

I have problems with that too. Typically running 16 threads. I had to rewrite all actions that generated source files (like header files with version information), because they never worked reliably on Windows. Mac has always been fine. I ended up using static header files with defines passed on the command line instead. Somewhat ugly but it works.

I always thought this was rather related to some Windows related scanning or anti-virus service, but I might give it a try with 2.3.6 and see if that solves it.

Cheers,
Arvid

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_____________________________
From: Bill Deegan <bill at baddogconsulting.com<mailto:bill at baddogconsulting.com>>
Sent: onsdag, maj 3, 2017 8:25 em
Subject: Re: [Scons-users] Possible 2.5.1 regression on Windows? (was: Unreliable build problem)
To: SCons users mailing list <scons-users at scons.org<mailto:scons-users at scons.org>>


Steve,

That's useful to know 2.3.6 isn't showing this.
We've had a few reports of others running into it.

Are you using CacheDirs?

-Bill

On Wed, May 3, 2017 at 10:42 AM, Hill, Steve (FP COM) <Steve.Hill at cobham.com<mailto:Steve.Hill at cobham.com>> wrote:
Hi all,

While looking at the unreliable build problem (which I will return to), I upgraded to 2.5.1 (from 2.3.6). Unfortunately, this seems to have introduced an issue which is preventing me from rolling the new version out the development community: I am seeing the file handle inheritance problem again that _scons_file and _scons_open were added to work around.

We typically use between 8 and 12 build threads (depending on the physical machine that we are building on) and, when building with 2.5.1, we quite frequently see the build fail with some sort of access denied issue. The build system automatically runs handle.exe in this case and I can see that the other (unrelated) build threads have an open handle on the file at this time. Reverting to 2.3.6 results in the issue going away.

I've confirmed that _scons_open and _scons_file are both in place for the built-in file() and open() and I've monkey patched os.open to assert that it is always called with the os.O_NOINHERIT flag. Does anyone know what other functions could be causing this that I can check?

Thanks,

S.

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