[CMake] using macros

[Owen Hogarth II]

Yes, indeed. Yikes, thanks for this!

On Thu, Jan 14, 2016, 17:21 Petr Kmoch <petr.kmoch at gmail.com> wrote:

> Hi Owen.
>
> As a sanity check, the definition of the macro in the toplevel CMakeList
> comes *before* the add_subdirectory() command for the one which errors out,
> right?
>
> Petr
>
> On Thu, Jan 14, 2016 at 8:25 AM, Owen Hogarth II <gurenchan at gmail.com>
> wrote:
>
>> I am trying to use a macro to enable c99 in some of my cmake modules.
>>
>> In the top level cmake file I add this macro
>>
>> macro(use_c99)
>>   if (CMAKE_VERSION VERSION_LESS "3.1")
>>     if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
>>       set (CMAKE_C_FLAGS "--std=gnu99 ${CMAKE_C_FLAGS}")
>>     endif ()
>>   else ()
>>     set (CMAKE_C_STANDARD 99)
>>   endif ()
>> endmacro(use_c99)
>>
>> then in another CMakeLists.txt file I add
>> use_c99()
>>
>> but I get this error:
>>
>> CMake Error at source/internal_src/cube/CMakeLists.txt:1 (use_c
>> 99):
>>   Unknown CMake command "use_c99".
>>
>> why am I unable to use the macro? My main cmake is using 3.0.2 from
>> debian repository.
>>
>>
>> --
>>
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