[CMake] Passing CMAKE_TOOLCHAIN_FILE on command line causes CMake warning

[Pat Marion]

That's a pretty messy workaround though, I think.  ExternalProject_Add
passes in lots of variables, including ones that do not typically change,
like CMAKE_CXX_COMPILER.  Why impose a special requirement on the
CMAKE_TOOLCHAIN_FILE variable?  Would a patch to avoid the warning be a
welcome change, or is there a reason the warning should remain?

Pat

On Wed, Feb 6, 2013 at 9:52 PM, Michael Wild <themiwi at gmail.com> wrote:

> Hi
>
>
> On Wed, Feb 6, 2013 at 11:59 AM, Pat Marion <pat.marion at kitware.com>wrote:
>
>> Hi,
>>
>> I'm emailing about bug 13093<http://public.kitware.com/Bug/view.php?id=13093>in the backlog.  I found comments
>> by Brad <http://www.cmake.org/pipermail/cmake/2011-February/042556.html>that suggest it's a legitimate warning, but I'm not sure how a project
>> could avoid the warning.
>
>
> By not specifying the toolchain file, for instance? If you have the
> problem in conjunction with ExternalProject_Add, check whether the
> CMakeCache.txt file exists in the build tree of the external project. If
> not, include the flag, otherwise drop it.
>
> My 2c
>
> Michael
>
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