[CMake] custom target (kernel modules)

[Alan W. Irwin]

On 2007-06-29 09:04+0800 Clark J. Wang wrote:

> On 6/28/07, Alan W. Irwin <irwin at beluga.phys.uvic.ca> wrote:
>> 
>> On 2007-06-28 10:08-0400 Alexandru Ciobanu wrote:
>> > If I use the ALL parameter in add_custom_target() it will always rebuild
>> it,
>> > even if none of source files has changes.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

> Hi Alan, I have a question here. Why bother to call both ADD_CUSTOM_COMMAND
> and ADD_CUSTOM_TARGET? It seems like only ADD_CUSTOM_TARGET with ALL
> parameter is enough. Does your method have some advantage?

See above quote from Alexandru.  Also, if you read the ADD_CUSTOM_TARGET
documentation, the reason why it always rebuilds is fully explained there.

"The target has no output file and is ALWAYS CONSIDERED OUT OF DATE...."

Alan

__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state implementation
for stellar interiors (freeeos.sf.net); PLplot scientific plotting software
package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of
Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
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