[cfe-dev] tablegenning projects always build due to add_custom_target

[Yaron Keren]

Hi,


The tablegenning projects of LLVM and clang always run commands since they
are use add_custom_target which is ALWAYS CONSIDERED OUT OF DATE even if
the commands try to create a file with the name of the target. See

http://www.cmake.org/cmake/help/cmake2.6docs.html#command:add_custom_target

This causes delay when running clang from an IDE.
41 projects run their commands without any need before clang runs.

Is there a better way to handle these targets so they will execute commands
only when dependencies change, like all the other projects in LLVM?

Yaron
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