[CMake] The else() in CMAKE_TOOLCHAIN_FILE

[Ashi]

Hi, Daniel, I've tried this, but it doesn't work, it returns same error as
before. And there are 2 lines in CMakeCache.txt:
//No help, variable specified on the command line.
A:BOOL=ON

Best Regards,
ashi


On Tue, Apr 2, 2013 at 7:44 PM, Daniel Pfeifer <daniel at pfeifer-mail.de>wrote:

> http://cmake.org/cmake/help/v2.8.10/cmake.html#opt:-Dvar:typevalue
>
> What is missing in the documentation, is that no cache entry is created if
> the type is not given.
> Set A as a cache entry of type BOOL like this:
>
> $ cmake -DCMAKE_TOOLCHAIN_FILE=./config.cmake -DA:BOOL=ON .
>
> 2013/4/2 Ashi <ashi08104 at gmail.com>
>
>> I think I find something to explain this: the config.cmake(the
>> CMAKE_TOOLCHAIN_FILE) is reloaded several times. on first-load, the A is
>> set, but on second-load and later-load, the A is not set. I think I can get
>> around this problem when A is kept set. However, I don't know how can I
>> keep the value set in cmake. Could anyone give me some suggestion? Thanks!
>>
>>
>> On Mon, Apr 1, 2013 at 7:47 PM, Ashi <ashi08104 at gmail.com> wrote:
>>
>>> Hi all, I've a problem in using else() in CMAKE_TOOLCHAIN_FILE, all
>>> files are:
>>>
>>> #==CMakeLists.txt==
>>> message("TEST")
>>>
>>> #==config.cmake==
>>> if(A)
>>>         message("A")
>>> elseif(B)
>>>         message("B")
>>> elseif(C)
>>>         message("C")
>>> else()
>>>         message(FATAL_ERROR "NONE")
>>> endif()
>>>
>>> and I run the cmake:
>>> $ cmake -DCMAKE_TOOLCHAIN_FILE=./config.cmake -DA=true .
>>>
>>> cmake returns:
>>>
>>> A
>>> A
>>> -- The C compiler identification is GNU 4.7.2
>>> -- The CXX compiler identification is GNU 4.7.2
>>> -- Check for working C compiler: /I usr/bin/gcc
>>>
>>> CMake Error at /home/zhongwei/projects/cmake_test/config.cmake:8
>>> (message):
>>>   NONE
>>> Call Stack (most recent call first):
>>>
>>> /home/zhongwei/projects/cmake_test/build/CMakeFiles/CMakeSystem.cmake:1
>>> (INCLUDE)
>>>   CMakeLists.txt:2 (PROJECT)
>>>
>>>
>>> CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
>>> CMake Error: Internal CMake error, TryCompile configure of cmake failed
>>> -- Configuring incomplete, errors occurred!
>>>
>>> My problem is why the else() statement is still run when A=true?
>>>
>>> Thanks,
>>> ashi
>>>
>>
>>
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