Erik Schnetter 981cefe8d3 Make Boost build with MPI on OS X ... Boost does not build on OS X with either gold or binutils. The gold linker does not exist on Darwin, and binutils on Darwin provides an assembler that doesn't work for Boost. - Introduce a variant that specifies whether to build with binutils, defaulting to true for backward compatibility - Auto-detect whether we build on Darwin; in this case, set the gold and binutils variant defaults to false - Clean up configure flags for as and ld		2016-01-17 10:54:12 -05:00
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spack	Make Boost build with MPI on OS X	2016-01-17 10:54:12 -05:00