Wow I didn't know about CMAke inserting the project thingy!!!
Ok now let me explain a little more. We want to simplify our Cmakelists and
make macros to help our users.
Now thanks to you we figured out the source of the problem.
This is the CMakeLists we want
SET (CMAKE_USER_MAKE_RULES_OVERRIDE
"${CMAKE_SOURCE_DIR}/CMake/Utils/flag_overrides.cmake")
SET (CMAKE_USER_MAKE_RULES_OVERRIDE_C
"${CMAKE_SOURCE_DIR}/CMake/Utils/c_flag_overrides.cmake")
SET (CMAKE_USER_MAKE_RULES_OVERRIDE_CXX
"${CMAKE_SOURCE_DIR}/CMake/Utils/cxx_flag_overrides.cmake")
PROJECT(rootProject)
# Init our build system
INCLUDE (CMake/CMakeInit.cmake)
We want to set the CMAKE_USER_MAKE_RULES_OVERRIDE in the CMakeInit.cmake so it
is hidden to developpers. To do that we must do it before the PROJECT command
or it wont work
But we also want to use CMAKE_SYSTEM_NAME in CMakeInit.cmake which wont work
if we put in CMakeInit.cmake before the PROJECT command.
So we are quite stuck....
Is there a command(other than project) that would initialize CMAke so that
after that command call we can access CMAKE_SYSTEM_NAME?
Thanks
MArtin
-----Original Message-----
From: cmake-boun...@cmake.org [mailto:cmake-boun...@cmake.org] On Behalf Of
Bill Hoffman
Sent: Wednesday, February 10, 2010 5:22 PM
To: Tyler Roscoe
Cc: cmake@cmake.org; Martin Guillon
Subject: Re: [CMake] [CMAKE] PROJECT command and CMAKE_SYSTEM_NAME
Tyler Roscoe wrote:
> On Wed, Feb 10, 2010 at 04:54:47PM +0100, Martin Guillon wrote:
>> Let s say we have a very simple CMakeLists.txt Like that
>>
>> cmake_minimum_required(VERSION 2.6)
>> MESSAGE (STATUS "The system is \"${CMAKE_SYSTEM_NAME}\"")
>>
>> Now as is the CMakelists works fine.
>>
>> The problem appears when we add a PROJECT(TOTO) If I do so wherever I
>> put it I get
>> -- The system is ""
>
> The project() command does a bunch of stuff, including defining and
> redefining various variables.
>
> What are you trying to do?
>
In addition to that, if the top level CMakeLists.txt file is missing a project
command, CMake will insert one for you at the very top...
So:
make_minimum_required(VERSION 2.6)
MESSAGE (STATUS "The system is \"${CMAKE_SYSTEM_NAME}\"")
is really:
project(Project)
make_minimum_required(VERSION 2.6)
MESSAGE (STATUS "The system is \"${CMAKE_SYSTEM_NAME}\"")
-Bill
--
Bill Hoffman
Kitware, Inc.
28 Corporate Drive
Clifton Park, NY 12065
bill.hoff...@kitware.com
http://www.kitware.com
518 881-4905 (Direct)
518 371-3971 x105
Fax (518) 371-4573
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