[jira] [Created] (ARROW-6415) [R] Remove usage of R CMD config CXXCPP

["Neal Richardson (Jira)" <ji...@apache.org>]

Neal Richardson created ARROW-6415:
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             Summary: [R] Remove usage of R CMD config CXXCPP
                 Key: ARROW-6415
                 URL: https://issues.apache.org/jira/browse/ARROW-6415
             Project: Apache Arrow
          Issue Type: Improvement
          Components: R
            Reporter: Neal Richardson
             Fix For: 0.15.0


From email from BDR at CRAN: 

"R CMD config CXXCPP has been deprecated: it is not used by R itself and 
there are several things wrong with the standard autoconf detection code:

- If CXXCPP is set by the user, it is not tested.  It could be empty, 
which AFAICS none of you allow for.
- The code looks at $CXX -E and /lib/cpp in turn, and tests a system C 
header without consulting CPPFLAGS.  /lib/cpp is unlikely to find C++ 
headers, and we have seen instances where without CPPFLAGS it did not 
find C headers.
- It is the setting for the default C++ compiler, in R-devel C++11 but 
not specified in earlier R (even 3.6.x could be C++98).

It would be better to use $(CXX) -E (or $(CXX11) etc) or test for yourself.

Please change at the next package update."



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