Figured out the answer on my own. The problem was how I was specifying the file names on the depends. Once I added the directory to the output file and used the directory on subsequent dependencies, this started working the way I expected.
Rick On Thu, May 8, 2014 at 5:39 PM, Rick McGuire <[email protected]> wrote: > There's something I'm not understanding about custom commands. I have > need to run a couple of custom commands during our build that generated > some output files. They are specified like this: > > # Build the rexx.img file > add_custom_command(OUTPUT rexx.img > COMMAND ./rexximage > DEPENDS rexximage rxapi rexxutil ${image_class_files} > ${platform_rexx_img_depends} > WORKING_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}) > add_custom_target(rexx_img ALL DEPENDS rexx.img) > > > It produces one output file that other targets have a dependency on and it > has dependencies on several files and several other targets. This is working > fine with everything occurring in the proper order, but I'm a bit surprised > to see this command getting run unconditionally even if none of the command > dependencies have changed. Not a big issue, but the fact the output file > gets updated means all of the subsequent build stages that have a dependency > on the rexx.img file also get activated. Why is this happening and is there > anything I can do to stop this from being generated unconditionally? > > > Rick > >
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