don't rebuild PrimEnv if genprimopcode and/or primops.txt don't exist
authorTim Chevalier <chevalier@alum.wellesley.edu>
Thu, 15 May 2008 23:04:05 +0000 (23:04 +0000)
committerTim Chevalier <chevalier@alum.wellesley.edu>
Thu, 15 May 2008 23:04:05 +0000 (23:04 +0000)
This helps if, for example, you want to build the Core tools on a machine that doesn't have a GHC build tree, and have a pre-existing copy of PrimEnv.hs.


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