Glenn Johnson ec9959b152 R extension dependencies with compiler wrapper ... This commit introduces a mechanism to insure that R package dependencies are built with the Spack compiler wrapper. A copy of Makeconf is made before `filter_compilers` is called. This is then pointed to by the R_MAKEVARS_SITE environment variable set up in `setup_dependent_environment`. With this the normal compilers are used outside of spack and the spack wrapper compilers are used inside of spack. This commit also standardizes on the `join_path` call. It also sets the commented build command to reflect what is actually used with the newer string formatting.		2016-07-22 17:05:01 -05:00
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spack	R extension dependencies with compiler wrapper	2016-07-22 17:05:01 -05:00