[Scons-dev] Windows Path

[Gary Oberbrunner]

On Sat, Sep 6, 2014 at 12:08 PM, Russel Winder <russel at winder.org.uk> wrote:

> There appears to be a fundamental problem with SCons tests on Windows,
> but this just maybe due to me using Windwoes for the first time in well
> over 22 years.
>
> I install a compiler, well two actually, MinGW and DMD, both to their
> preferred installations. Both are usable from cmd.exe. However SCons
> does not find either of them. This would imply that SCons is ignoring
> the %PATH% at the system level.
>
> Is this the case, or am I missing something.
>

It is the case.  I think it's not right.  If a tool is installed in its
preferred location, SCons should find it, on whatever OS.  (This is part of
what Anatoly was mentioning before, but solving this wouldn't solve all of
that problem.)

It is tricky though, because SCons tools shouldn't muck with
env['ENV']['PATH'] too much; otherwise adding a tool may change the result
of a build.  Some tools just put the whole path to the tool executable in
as the value of, say, $CC.  But that of course makes the generated compile
lines look ugly.

For MinGW in particular it might be dangerous to add its bin dir to
env['ENV']['PATH'] because I think MinGW puts all kinds of Unixy tools in
that bin dir, which (as William points out) would make builds less
reproducible.

-- 
Gary
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