[CMake] configure_file - false vs "0"

[Michael Wild]

On 9. Aug, 2009, at 18:39, James C. Sutherland wrote:

>
> On Aug 9, 2009, at 10:33 AM, James C. Sutherland wrote:
>
>>
>> On Aug 9, 2009, at 10:20 AM, Michael Wild wrote:
>>
>>>
>>> On 9. Aug, 2009, at 18:06, James C. Sutherland wrote:
>>>
>>>> In my configure.h.in file I have:
>>>>
>>>> #cmakedefine TEST_VAR_VALUE
>>>>
>>>> In my CMakeLists.txt file I have:
>>>>
>>>> configure_file( ${PROJECT_SOURCE_DIR}/src/config.h.in $ 
>>>> {PROJECT_SOURCE_DIR}/src/configure.h )
>>>> set( TEST_VAR_VALUE  "0" )
>>>>
>>>> This results in a configure.h file containing:
>>>> /* #undef TEST_VAR_VALUE */
>>>>
>>>> But what I would like is:
>>>> #define TEST_VAR_VALUE 0
>>>>
>>>>
>>>> So basically cmake is seeing the value of TEST_VAR_VALUE as 0 and  
>>>> treating it as "false" rather than a value.
>>>>
>>>> Any ideas how to accomplish this?
>>>>
>>>> James
>>>>
>>>
>>>
>>> Use the (undocumented) #cmakedefine01.
>>>
>>> I already submitted a patch, and the documentation has been fixed  
>>> in CVS.
>>>
>>> Michael
>>>
>>
>> Thanks!  That did it.
>
>
> Okay - I spoke too soon.  It gave me a partial solution.
>
> What if I want to have something like
> #define TEST_VAR_VALUE 5
>
> In the .in file:
> #cmakedefine TEST_VAR_VALUE ${TEST_VAR_VALUE}
> doesn't work (for reasons mentioned above)
>
> However,
> #cmakedefine01 TEST_VAR_VALUE ${TEST_VAR_VALUE}
> results in
> #define TEST_VAR_VALUE 5 1
> if I have
> set( TEST_VAR_VALUE 5 )
> in my CMakeLists.txt file.
>
> Can I get rid of the trailing value?
>

Aah, now I see what you want...

#define TEST_VAR_VALUE ${TEST_VAR_VALUE}

is what you want.