* installing *source* package ‘dress.graph’ ...
** this is package ‘dress.graph’ version ‘0.8.3’
** package ‘dress.graph’ successfully unpacked and MD5 sums checked
** using staged installation
  dress.graph configure:
    PKG_CFLAGS = -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include
    PKG_LIBS   =  -fopenmp -lm -L/opt/R/arm64/lib -lmpi
** libs
using C compiler: ‘Apple clang version 21.0.0 (clang-2100.0.123.102)’
using SDK: ‘MacOSX26.4.1.sdk’
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c delta_dress.c -o delta_dress.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [delta_dress.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c delta_dress_cuda.c -o delta_dress_cuda.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [delta_dress_cuda.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c delta_dress_impl.c -o delta_dress_impl.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [delta_dress_impl.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c delta_dress_omp.c -o delta_dress_omp.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [delta_dress_omp.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c dress.c -o dress.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [dress.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c dress_cuda_r.c -o dress_cuda_r.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [dress_cuda_r.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c dress_histogram.c -o dress_histogram.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [dress_histogram.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c dress_mpi.c -o dress_mpi.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [dress_mpi.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c dress_mpi_r.c -o dress_mpi_r.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [dress_mpi_r.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c dress_omp.c -o dress_omp.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [dress_omp.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c dress_omp_r.c -o dress_omp_r.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [dress_omp_r.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c dress_r.c -o dress_r.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [dress_r.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c nabla_dress.c -o nabla_dress.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [nabla_dress.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c nabla_dress_cuda.c -o nabla_dress_cuda.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [nabla_dress_cuda.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c nabla_dress_impl.c -o nabla_dress_impl.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [nabla_dress_impl.o] Error 1
clang -mmacos-version-min=26 -std=gnu23 -I"/Users/ripley/R/R-devel/include" -DNDEBUG   -isystem /opt/R/arm64/include   -I.  -fopenmp -DDRESS_MPI -I/opt/R/arm64/include -fPIC  -falign-functions=8 -g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion -Wstrict-prototypes  -c nabla_dress_omp.c -o nabla_dress_omp.o
clang: error: unsupported option '-fopenmp'
make[1]: *** [nabla_dress_omp.o] Error 1
make[1]: Target `all' not remade because of errors.
ERROR: compilation failed for package ‘dress.graph’
* removing ‘/Users/ripley/R/packages/tests-devel/dress.graph.Rcheck/dress.graph’