[CMake] write file if different?

[Matthew Woehlke]

On 2013-05-28 16:07, Matthew Woehlke wrote:
> Is there a built-in way to write a string to a file (a la FILE(WRITE))
> that will only write the file if the content would be different? (Or
> does FILE(WRITE) already work this way despite no obvious hint in the
> documentation that it does?)
>
> Right now I am writing to a temporary file and running cmake -E
> copy_if_different, then removing the temporary file, but this seems
> inelegant and I am wondering if there is a better solution.

Not strictly "built-in", but it looks like the best way is:

   set(CMAKE_CONFIGURABLE_FILE_CONTENT "${CONTENT}")
   configure_file(
     "${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in"
     "${PATH}" @ONLY
   )

-- 
Matthew