[CMake] [CMAKE] Getting compilation date through CMake

[Jon Haitz Legarreta]

Dear Fraser and Matthew,
yes, both approaches work. Thank you.

There seems to be a trailing endline in the response given by $ENV{COMSPEC}
/c date /t, so the following regex helps deleting it:

STRING(REGEX REPLACE "(\r?\n)+$" "" _date "${_date}")

Thanks again,
JON HAITZ



On 5 December 2013 22:34, Matthew Woehlke <matthew.woehlke at kitware.com>wrote:

> On 2013-12-05 15:46, Fraser Hutchison wrote:
>
>> If you can specify CMake version 2.8.11 as a minimum, you could use
>> the string(TIMESTAMP ...) command instead:
>>
>> string(TIMESTAMP _output "%d/%m/%Y")
>>
>> Bear in mind that these only execute when CMake runs (i.e. at configure
>> time)
>> rather than at build time, so strictly-speaking you're not actually
>> grabbing the
>> compile date.
>>
>
> Of course you could put that in a CMake script and execute it with e.g.
> '${CMAKE_COMMAND} -p ${CMAKE_CURRENT_SOURCE_DIR}/get_date.cmake' in a
> custom command :-). Then it would truly be the compile date. (Needless to
> say, the script would need to write the date into some generated source
> file, e.g. with configure_file.)
>
> --
> Matthew
>
>
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