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)
commitbca61eb59ad615793175e4d1a3de7a243b41de44
tree02712eef64353f69ef591bf3b922f3a1e018903f
parent2d0131da643d1f8da16816c672b7e29defcf2a2d
don't rebuild PrimEnv if genprimopcode and/or primops.txt don't exist

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.
utils/ext-core/Setup.lhs