[MacPorts] #61256: Multicore support for math/R

[MacPorts]

#61256: Multicore support for math/R
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  Reporter:  webbp        |      Owner:  kjellpk
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  R            |
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Comment (by webbp):

 My description of the solution isn't quite right. The way I solved this
 was with:

 {{{
 ~/.R/Makevars:
 LLVM_LOC = /opt/local/libexec/llvm-10
 CC=$(LLVM_LOC)/bin/clang -fopenmp
 CXX=$(LLVM_LOC)/bin/clang++ -fopenmp
 CFLAGS=-g -O3 -Wall -pedantic -std=gnu99 -mtune=native -pipe
 CXXFLAGS=-g -O3 -Wall -pedantic -std=c++11 -mtune=native -pipe
 LDFLAGS=-L/opt/local/lib -L$(LLVM_LOC)/lib -Wl,-rpath,$(LLVM_LOC)/lib
 CPPFLAGS=-I/opt/local/include -I$(LLVM_LOC)/include
 }}}

 That alone on my new machine breaks installing R packages, so there are
 some missing steps, and some of the other steps I took above may have been
 irrelevant.

-- 
Ticket URL: <https://trac.macports.org/ticket/61256#comment:4>
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