[Scons-users] MSVC is broken for x86 builds on x64 hosts

[Gary Oberbrunner]

I'm guessing the link is running in a different Environment somehow. Can
you show the full SConstruct/SConscript?

-- Gary

On Wed, May 22, 2019 at 12:15 PM Mats Wichmann <mats at wichmann.us> wrote:

> On 5/22/19 9:26 AM, Michael Hartmann wrote:
> > Actually it’s even worse:
> >
> >
> >
> > While the correct cl.exe is used for compilation, the INCLUDE and LIB
> > paths are set for a VS 2017 runtime.
> >
> >
> >
> > *Von:* Scons-users <scons-users-bounces at scons.org> *Im Auftrag von
> > *Michael Hartmann
> > *Gesendet:* Mittwoch, 22. Mai 2019 16:34
> > *An:* SCons users mailing list <scons-users at scons.org>
> > *Betreff:* Re: [Scons-users] MSVC is broken for x86 builds on x64 hosts
> >
> >
> >
> > There still is an issue that is preventing me from building my target
> > with Visual Studio 9.0 Express. The SConstruct looks kind of like this:
> >
> >
> >
> > some_environment = Environment(
> >
> >     LINKFLAGS = '/MANIFEST /INCREMENTAL:NO /DEBUG',
> >
> >     CFLAGS = '/Od /MD /EHsc /MP /Zi /Zl /Zp8',
> >
> >     MSVC_VERSION = '9.0Exp',
> >
> >     MSVC_BATCH = True,
> >
> >     HOST_ARCH = 'x86',
> >
> >     TARGET_ARCH = 'x86'
> >
> > )
> >
> >
> >
> > some_environment.SharedLibrary('output.dll', ["test1.c", "test2.c"])
> >
> >
> >
> > The sources are compiled using the correct cl.exe. After the compile
> > step and before the link step the environment gets reset, so the wrong
> > linker is invoked and the wrong standard library is linked (Both from
> > Visual Studio 2017 for amd64).
>
> So it looks like things are fine through line 152, with scons doing the
> compilation to objects just after saying:
>
> vc.py:msvc_setup_env() env:LIBPATH -> ['C:\\Program Files
> (x86)\\Microsoft Visual Studio 9.0\\VC\\LIB']
>
> and then it goes wrong when the mslink tool initializes, as it says:
>
> msvc_setup_env_once CALLED FROM mslink.py
> msvc_setup_env()
> get_default_version()
> get_default_version(): msvc_version:None msvs_version:None
> installed_vcs:['14.1', '14.0', '12.0', '12.0Exp', '10.0', '10.0Exp',
> '9.0Exp']
> msvc_setup_env: using default installed MSVC version '14.1'
>
>
> It shouldn't be doing what it's doing, the earlier calls to
> msvc_setup_env_once should have caused MSVC_SETUP_RUN to be set in the
> environment, and so the function should just return, not go on and call
> msvc_setup_env and come up with new answers. So presumably it must be
> using a new environment?
>
> What a mess that stuff all is.  I can't figure why the mslink tool is
> being initialized a second time, as it already ran to do the first batch
> of setup, the time it knew about MSVC_VERSION - line 86 of your paste.
>
> Needs one of the wizards to explain, I guess.
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-- 
Gary
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