Failing to compile package from Mac [duplicate]

Question

I'm trying to install a package in R, and I get the following error:

clang: error: unsupported option '-fopenmp'

This, is after I got an error:

ld: warning: search path '/opt/gfortran/lib/gcc/aarch64-apple-darwin20.0/12.2.0' not found
ld: warning: search path '/opt/gfortran/lib' not found
ld: library 'gfortran' not found

From my understanding this is an issue of the compiler. So I edited .R/Makevars to point towards the correct compiler (GCC). If I understand correctly, it should support OpenMP. This is currently my Makevars file:

# This file's location is ~/.R/Makevars
# Default variables (no omp)
# Also potentially CXX11 (for C++11 compiler)
# CXX11=/usr/bin/clang++

# I followed the instructions at http://hpc.sourceforge.net/ to install gcc 4.9
CC=/opt/homebrew/bin/gcc-14    
CXX=/opt/homebrew/bin/gcc-14
FC=/opt/homebrew/bin/gfortran
F77=/opt/homebrew/bin/gfortran

PKG_LIBS = -fopenmp -lgomp
PKG_CFLAGS= -O3 -Wall -pipe -pedantic -std=gnu99 -fopenmp
CFLAGS= -O3 -Wall -pipe -pedantic -std=gnu99 -fopenmp

SHLIB_OPENMP_CFLAGS=-Xpreprocessor -fopenmp
SHLIB_OPENMP_CXXFLAGS=-Xpreprocessor -fopenmp

I've seen some other questions about the topic, but they were either directly related to data.table package. Or they didn't solve the issue.

Already tried stackoverflow.com/q/69639782/6574038?

jay.sf
– jay.sf

2024-07-15 16:38:39 +00:00
Commented Jul 15, 2024 at 16:38 — jay.sf
– jay.sf, Commented Jul 15, 2024 at 16:38
Yes. I had to compile it.

Kozolovska
– Kozolovska

2024-07-17 06:05:05 +00:00
Commented Jul 17, 2024 at 6:05 — Kozolovska
– Kozolovska, Commented Jul 17, 2024 at 6:05

Kozolovska · Accepted Answer · 2024-07-17 06:06:33Z

1

What worked for me is setting the compiler paths directly:

# This file's location is ~/.R/Makevars
# Default variables (no omp)

CC=/opt/homebrew/bin/gcc-14 
CXX=/opt/homebrew/bin/gcc-14 
FC=/opt/homebrew/bin/gfortran 
F77=/opt/homebrew/bin/gfortran 
FLIBS=-L/opt/homebrew/opt/gcc/lib/gcc/14

Not sure if it has openMP support or not, but it allowed me to compile the package.

answered Jul 17, 2024 at 6:06

Kozolovska

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