[CMake] How to duplicate a source file and rename it

[J Decker]

On Fri, Sep 21, 2018 at 3:29 PM J Decker <d3ck0r at gmail.com> wrote:

>
>
> On Fri, Sep 21, 2018 at 3:24 PM Ke Gao <ke.gao.ut at gmail.com> wrote:
>
>> Thanks. I forgot to say my CMakeList.txt is not located together with the
>> source files. So I used the following, it seems not working:
>> add_custom_command( OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/../../aaa_file.c
>>                            DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/../../
>> file.c
>>                            COMMAND ${CMAKE_COMMAND} -E copy_if_different
>> ${CMAKE_CURRENT_SOURCE_DIR}/../../file.c
>> ${CMAKE_CURRENT_SOURCE_DIR}/../../aaa_file.c
>>     )
>> Is there an easier way to do this?
>>
> not really...
> NOt sure why it wouldn't work unless current_source_dir isn't what you
> think it is.
> I actually copy mine into
>

It also wouldn't work if you didn't use
${CMAKE_CURRENT_SORUCE_DIR}/../../aaa_file.c in another target.
(and by the same path... which is partially why I copy into BINARY_DIR,
then it's in a known place for all projects int he tree

>
>

>                            COMMAND ${CMAKE_COMMAND} -E copy_if_different
> ${SOURCE} ${CMAKE_BINARY_DIR}/${BASENAME}
>
>  (basename is the path part of the ${SOURCE})
>
>>
>>
>> On Fri, Sep 21, 2018 at 4:10 PM J Decker <d3ck0r at gmail.com> wrote:
>>
>>>
>>>
>>> On Fri, Sep 21, 2018 at 3:00 PM Ke Gao <ke.gao.ut at gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> In a project, I need to first duplicate a source file and rename it.
>>>> For example, I want to change "file.c" to "aaa_file.c", and after
>>>> compiling, I will delete it. This is similar to using "cp file.c
>>>> aaa_file.c". How to easily do this in CMake? I found "file" command doesn't
>>>> work well for this.
>>>>
>>>>
>>> add_custom_command( OUTPUT aaa_file.c
>>>                            DEPENDS file.c
>>>                            COMMAND ${CMAKE_COMMAND} -E copy_if_different
>>> file.c aaa_file.c
>>>     )
>>>
>>> then you just have to reference the source file 'aaa_file.c' and it will
>>> get updated if file.c is different. I also do
>>>                              COMMAND ${CMAKE_COMMAND} -E touch aaa_file.c
>>>
>>> just to make sure it is new.
>>>
>>>
>>>
>>>> Thank you very much.
>>>>
>>>> --
>>>>
>>>> ..............................................................................................................................................
>>>> Ke Gao
>>>> --
>>>>
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>>> --
>>>
>>> Powered by www.kitware.com
>>>
>>> Please keep messages on-topic and check the CMake FAQ at:
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>>
>>
>> --
>>
>> ..............................................................................................................................................
>> Ke Gao
>>
>
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