[Scons-dev] Supefluous tempfiles used for DLLs

[Kenny, Jason L]

Let me double check this.. I thought it was working.. I do have a patch laying around for this some place we gave to Steve knight
I will see about getting it applied in a push request.

Jason

From: scons-dev-bounces at scons.org [mailto:scons-dev-bounces at scons.org] On Behalf Of Kyle J Strand
Sent: Friday, July 06, 2012 10:07 AM
To: SCons developer list
Cc: SCons developer list; scons-dev-bounces at scons.org
Subject: Re: [Scons-dev] Supefluous tempfiles used for DLLs

Thanks. It's not patched in 2.1.0, though, because that's what I'm running.

-----------------------------------------------------------------------
Kyle Strand, Software Intern
Beckman Coulter, Inc., Life Sciences Division
4862 Innovation Drive, Fort Collins, Colorado, 80525
(970) 204-7036

scons-dev-bounces at scons.org<mailto:scons-dev-bounces at scons.org> wrote on 07/05/2012 04:16:18 PM:


> "Kenny, Jason L" <jason.l.kenny at intel.com<mailto:jason.l.kenny at intel.com>>

> Sent by: scons-dev-bounces at scons.org<mailto:scons-dev-bounces at scons.org>

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> 07/05/2012 04:16 PM

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> Subject

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> Re: [Scons-dev] Supefluous tempfiles used for DLLs

>

> This is caused by a quirk in the how actions work internally in

> SCons. The quick answer to why two are created is because on file is

> created from the Scons doing the actions, and one is created in

> printing out the subst()ed actions value to the screen. This lead to

> a bug in which the a temp file was created but never used and left

> of the system, which would lead to in automated build millions of

> small temp files laying around in the user systems. I believe this

> was patched in SCons 2.1 so that only one temp file is created and used.

>

> Jason

>

> From: scons-dev-bounces at scons.org<mailto:scons-dev-bounces at scons.org> [mailto:scons-dev-bounces at scons.org]

> On Behalf Of Kyle J Strand

> Sent: Thursday, July 05, 2012 5:05 PM

> To: scons-dev at scons.org<mailto:scons-dev at scons.org>

> Subject: [Scons-dev] Supefluous tempfiles used for DLLs

>

> It appears to me that whenever SCons builds DLL using a link command

> that exceeds the length of $MAXLINELENGTH, it makes a tempfile and

> uses it to perform the link command as expected, but then makes a

> second tempfile with the exact same content that never gets used.

> Here's sample output:

>

> Using tempfile c:\users\kjstrand\appdata\local\temp\tmpnrlhqp.lnk

> for command line:

> cl /Fobuild\test.obj /c src\test.cpp /TP /nologo /DLIB_PACK_EXPORT

> cl @c:\users\kjstrand\appdata\local\temp\tmpnrlhqp.lnk

> Using tempfile c:\users\kjstrand\appdata\local\temp\tmpzj9cph.lnk

> for command line:

> cl /Fobuild\test.obj /c src\test.cpp /TP /nologo /DLIB_PACK_EXPORT

>

> The second tempfile, tmpzj9cph.lnk in this case, appears nowhere

> else in the output for this run. This is the behavior I observe for

> every DLL build using a tempfile. Oddly enough, though, I don't

> observe this when static libs are built. Is this actually a bug, or

> does SCons actually need that second tempfile for some reason? Of

> course, this doesn't seem like a hugely important bug, but I figured

> it would be worth asking about.

>

> -----------------------------------------------------------------------

> Kyle Strand, Software Intern

> Beckman Coulter, Inc., Life Sciences Division

> 4862 Innovation Drive, Fort Collins, Colorado, 80525

> (970) 204-7036

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