BTW, reading the manual (in this case 'R Installation and Administration') often helps, and would have here.

On 16/11/2018 19:10, Jonathan Greenberg wrote:
I'm hoping to get some insight into seeing if I can get "rj" working again in Mojave/R 
3.5.1 -- this is a requirements for the Eclipse interface to R "Stat-ET") -- I'm seeing 
similar issues when trying to get rJava working also from source, e.g.:

Rscript -e 'install.packages("rJava", repos="http://rforge.net";, type="source")'

Why are you not installing from CRAN? Discussing off-CRAN versions here is frowned on, not least as we know the CRAN version works.

and

install.packages(c("rj", "rj.gd<http://rj.gd>"), 
repos="http://download.walware.de/rj-2.1",type="source";)

All issues lead to:

"clang: error: unsupported option '-fopenmp'"

I've installed clang6 and gfortran61 from CRAN, but that doesn't seem to work.  
I've tried tweaking the ~/.R/Makevars, e.g.:

FLIBS=-L/usr/local/gfortran/lib -lgfortran -lquadmath -lm
CC=/usr/local/clang6/bin/clang
CXX=/usr/local/clang6/bin/clang++
CXX1X=/usr/local/clang6/bin/clang++
CXX98=/usr/local/clang6/bin/clang++
CXX11=/usr/local/clang6/bin/clang++
CXX14=/usr/local/clang6/bin/clang++
CXX17=/usr/local/clang6/bin/clang++
LDFLAGS=-L/usr/local/clang6/lib

Which only results in a different error:
ld: warning: text-based stub file 
/System/Library/Frameworks//JavaVM.framework/JavaVM.tbd and library file 
/System/Library/Frameworks//JavaVM.framework/JavaVM are out of sync. Falling 
back to library file for linking.
ld: library not found for -lomp

Any ideas?

That is not an *error*! It is a warning from the OS (ld is part of the OS) about parts of the OS being out of step, and has been going on for some time (AFAIR with High Sierra too). You have not shown us the complete output, but on my systems installation of CRAN rJava proceeds.

--
--
Jonathan A. Greenberg, PhD
Randall Endowed Professor and Associate Professor of Remote Sensing
Global Environmental Analysis and Remote Sensing (GEARS) Laboratory
Natural Resources & Environmental Science
University of Nevada, Reno
1664 N Virginia St MS/0186
Reno, NV 89557
Phone: 415-763-5476
http://www.unr.edu/nres
Gchat: jgrn...@gmail.com<mailto:jgrn...@gmail.com>, Skype: jgrn3007


--
Brian D. Ripley,                  rip...@stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford

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