ignore uninitialized submodules when checking if ./configure should be re-run #17129
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bors
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Sep 10, 2014
Currently `./configure --llvm-root=...` and similar flags will break incremental builds by forcing reconfiguration on every `make`. This happens because `reconfig.mk` incorrectly treats submodules in the `-` (uninitialized) state as requiring reconfiguration, and `./configure` deliberately deinitializes unneeded submodules. The fix is to reconfigure only when submodules are in the `+` state (wrong commit checked out).
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Currently
./configure --llvm-root=...and similar flags will break incremental builds by forcing reconfiguration on everymake. This happens becausereconfig.mkincorrectly treats submodules in the-(uninitialized) state as requiring reconfiguration, and./configuredeliberately deinitializes unneeded submodules. The fix is to reconfigure only when submodules are in the+state (wrong commit checked out).