* installing *source* package ‘RDieHarder’ ...
** package ‘RDieHarder’ successfully unpacked and MD5 sums checked
** using staged installation
checking endianness... little
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for gsl-config... /usr/local/bin/gsl-config
configure: creating ./config.status
config.status: creating src/Makevars
configure: creating ./config.status
config.status: creating src/Makevars
config.status: creating src/libdieharder/Makefile

RDieHarder 0.2.1
================

compiler flags:  -Ilibdieharder -I. -DRDIEHARDER -I/usr/local/include
link argument:   -Llibdieharder -ldieharder -L/usr/local/lib -lgsl -lgslcblas
build dieharder: libdieharder.a

** libs
make CC="clang -mmacosx-version-min=10.13" CFLAGS="-Wall -g -O2  -std=c99 -fpic -DRDIEHARDER" \
			AR="ar" RANLIB="ranlib" \
			--directory=libdieharder libdieharder.a
clang -mmacosx-version-min=10.13 -Wall -g -O2  -std=c99 -fpic -DRDIEHARDER -DVERSION=3.31.1 -DLITTLE_ENDIAN=1 -I.  -c -o bits.o bits.c
In file included from bits.c:7:
./dieharder/libdieharder.h:29:10: fatal error: 'gsl/gsl_rng.h' file not found
#include <gsl/gsl_rng.h>
         ^~~~~~~~~~~~~~~
1 error generated.
make[1]: *** [bits.o] Error 1
make: *** [libdieharder.a] Error 2
ERROR: compilation failed for package ‘RDieHarder’
* removing ‘/Volumes/Builds/packages/high-sierra-x86_64/results/4.1/RDieHarder.Rcheck/RDieHarder’