[CMake] configure_file without continuous re-build

[Daniel Blezek]

Hmmm,  I'll dig a little deeper to see what's hapening.

Thanks,
-dan


On 1/12/10 4:25 PM, "Bill Hoffman" <bill.hoffman at kitware.com> wrote:

> Daniel Blezek wrote:
>> Hi Mike,
>> 
>>   Sorry, I guess I wasn't quite clear.  The re-builds occur when I touch any
>> CMakeLists.txt file in the entire project.  Since we're under active
>> development, new source files are being added fairly frequently.  I didn't
>> want re-builds to trigger each time a developer adds a new class.
>> 
>>   I believe that configure_file() is re-run whenever CMake does a
>> "Generate", not only when the .in file is modified.  On a normal build this
>> isn't an issue, but is a problem for us.
>> 
>>   Putting the "NOT EXISTS" guard seems to solve the problem, but is a little
>> ugly.
>> 
> configure_file will only write the file if it changes.   You must be
> changing the file each time cmake is run, which is bad....
> 
> -Bill

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Daniel Blezek, PhD
Medical Imaging Informatics Innovation Center

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