Glenn Johnson 42c7d24075 Modifications to r package (#11957) ... This PR has several modifications for the r package. - The tk package is always depended on but this pulls in X11, making the 'X' variant non-functional. This PR sets a dependency of tk on '+X'. - There is a missing dependency on libxmu when '+X' is set. - The libraries for R wind up in a non-standard location and are thus left out of the RPATH settings. This PR adds that directory to RPATH. - The MKL integer interface for gfortran is not in the BLAS libs. This PR replaces the intel interface with the gfortran interface if needed. - Use the `LibraryList` `ld_flags` method for blas as that is more in line with th R Installation and Administration manual. Note that this PR depends on PR #11956. This PR closes #8642.		2019-07-11 22:22:37 -05:00
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spack	Modifications to r package (#11957)	2019-07-11 22:22:37 -05:00