[R-SIG-Mac] trying to compile packages from source, but lacking /opt/local/bin/gcc-mp-5

[Vincent Carey]

%vjcair> R CMD config CC

/opt/local/bin/gcc-mp-5


I don't seem to be able to override this using environment variable CC.  And

I cannot see how to install gcc-mp-5.  This version of R was obtained from

r.research.att.com, R-3.4-branch-el-capitan.pkg.


I would have expected clang to be the c compiler for this build.  I will

appreciate any suggestions.  As it stands, any installation from source
requiring

compilation throws errors like

/bin/sh: /opt/local/bin/g++-mp-5: No such file or directory


R version 3.4.2 Patched (2017-10-20 r73567) -- "Short Summer"

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R version 3.4.2 Patched (2017-10-20 r73567)

Platform: x86_64-apple-darwin15.6.0 (64-bit)

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LAPACK: /Library/Frameworks/R.framework/Versions/3.4

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