[ARROW-6415] [R] Remove usage of R CMD config CXXCPP

• Type: Improvement
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.15.0
• Component/s: R
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/22787
• Assignee: Neal Richardson
• Reporter: Neal Richardson
• Created: 02/Sep/19 15:20
• Updated: 11/Jan/23 07:46
• Resolved: 04/Sep/19 01:26

Description

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."

Issue Links

• links to: GitHub Pull Request #5266