If you don't want to see the warning, then also pass in --no-warn-unused-cli on
the command line.
--no-warn-unused-cli = Don't warn about command line options.
But that suppresses the warning for all unreferenced variables.
Or... add:
message(STATUS "CMAKE_TOOLCHAIN_FILE='${CMAKE_TOOLCHAIN_FILE}'")
to the project's CMakeLists.txt file so the variable is always referenced.
The point is: CMAKE_TOOLCHAIN_FILE is only read on the first configure. After
that point, all toolchain stuff is cached and the file is unnecessary for
subsequent configures.
That bug should just be closed as "won't fix" because it's not a bug. It's the
intended behavior, and there are multiple ways to avoid the legitimate warning.
Just my opinion,
D
-----Original Message-----
From: Pat Marion <pat.mar...@kitware.com>
To: Michael Wild <them...@gmail.com>
Cc: cmake <cmake@cmake.org>
Sent: Wed, Feb 6, 2013 7:23 am
Subject: Re: [CMake] Passing CMAKE_TOOLCHAIN_FILE on command line causes CMake
warning
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 <them...@gmail.com> wrote:
Hi
On Wed, Feb 6, 2013 at 11:59 AM, Pat Marion <pat.mar...@kitware.com> wrote:
Hi,
I'm emailing about bug 13093 in the backlog. I found comments by Brad 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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