I should have posted this here. Sent from my iPhone
Begin forwarded message: From: Naresh Gurbuxani <[email protected]> Date: December 29, 2025 at 12:02:10 PM EST To: [email protected] Subject: [R] data.table does not find openmp support On my Intel Mac, with R 4.4, data.table worked with openmp support. After installing R 4.5, I reinstalled data.table using install.packages("data.table"). Installation went smoothly, but data.table did not detect openmp support. I removed data.table, then reinstalled using install.packages("data.table", type = "source"). Now data.table install has non-zero exit status. Following instructions at https://mac.r-project.org/openmp/, I installed Open MP support by running on command line curl -O https://mac.r-project.org/openmp/openmp-17.0.6-darwin20-Release.tar.gz sudo tar fvxz openmp-17.0.6-darwin20-Release.tar.gz -C / Below is information from my R session: sessionInfo() R version 4.5.2 (2025-10-31) Platform: x86_64-apple-darwin20 Running under: macOS Sequoia 15.7.3 Matrix products: default BLAS: /Library/Frameworks/R.framework/Versions/4.5-x86_64/Resources/lib/libRblas.0.dylib LAPACK: /Library/Frameworks/R.framework/Versions/4.5-x86_64/Resources/lib/libRlapack.dylib; LAPACK version 3.12.1 locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 time zone: America/New_York tzcode source: internal attached base packages: [1] stats graphics utils datasets grDevices methods base other attached packages: [1] lattice_0.22-7 loaded via a namespace (and not attached): [1] compiler_4.5.2 tools_4.5.2 grid_4.5.2 system("gfortran --version") GNU Fortran (GCC) 14.2.0 Copyright (C) 2024 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. system("xcode-select -version") xcode-select version 2410. system("gcc --version") Apple clang version 17.0.0 (clang-1700.6.3.2) Target: x86_64-apple-darwin24.6.0 Thread model: posix InstalledDir: /Library/Developer/CommandLineTools/usr/bin install.packages("data.table", lib = .libPaths()[2], type = "source") trying URL 'https://cran.r-project.org/src/contrib/data.table_1.18.0.tar.gz' Content type 'application/x-gzip' length 6020932 bytes (5.7 MB) ================================================== downloaded 5.7 MB * installing *source* package ‘data.table’ ... ** this is package ‘data.table’ version ‘1.18.0’ ** package ‘data.table’ successfully unpacked and MD5 sums checked ** using staged installation zlib 1.3.1 is available ok * checking if R installation supports OpenMP with "-Xclang -fopenmp" ... yes ** libs using C compiler: ‘Apple clang version 17.0.0 (clang-1700.6.3.2)’ using SDK: ‘MacOSX26.2.sdk’ clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c assign.c -o assign.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c between.c -o between.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c bmerge.c -o bmerge.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c chmatch.c -o chmatch.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c cj.c -o cj.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c coalesce.c -o coalesce.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c dogroups.c -o dogroups.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c fastmean.c -o fastmean.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c fcast.c -o fcast.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c fifelse.c -o fifelse.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c fmelt.c -o fmelt.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c forder.c -o forder.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c frank.c -o frank.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c fread.c -o fread.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c freadR.c -o freadR.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c froll.c -o froll.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c frollR.c -o frollR.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c frolladaptive.c -o frolladaptive.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c frollapply.c -o frollapply.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c fsort.c -o fsort.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c fwrite.c -o fwrite.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c fwriteR.c -o fwriteR.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c gsumm.c -o gsumm.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c hash.c -o hash.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c idatetime.c -o idatetime.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c ijoin.c -o ijoin.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c init.c -o init.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c inrange.c -o inrange.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c mergelist.c -o mergelist.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c nafill.c -o nafill.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c negate.c -o negate.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c nqrecreateindices.c -o nqrecreateindices.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c openmp-utils.c -o openmp-utils.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c programming.c -o programming.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c quickselect.c -o quickselect.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c rbindlist.c -o rbindlist.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c reorder.c -o reorder.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c shellsort.c -o shellsort.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c shift.c -o shift.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c snprintf.c -o snprintf.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c subset.c -o subset.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c transpose.c -o transpose.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c types.c -o types.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c uniqlist.c -o uniqlist.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c utils.c -o utils.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c vecseq.c -o vecseq.o clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I/opt/R/x86_64/include -Xclang -fopenmp -I/opt/local/include -fPIC -falign-functions=64 -Wall -g -O2 -c wrappers.c -o wrappers.o clang -arch x86_64 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -L/Library/Frameworks/R.framework/Resources/lib -L/opt/R/x86_64/lib -o data.table.so assign.o between.o bmerge.o chmatch.o cj.o coalesce.o dogroups.o fastmean.o fcast.o fifelse.o fmelt.o forder.o frank.o fread.o freadR.o froll.o frollR.o frolladaptive.o frollapply.o fsort.o fwrite.o fwriteR.o gsumm.o hash.o idatetime.o ijoin.o init.o inrange.o mergelist.o nafill.o negate.o nqrecreateindices.o openmp-utils.o programming.o quickselect.o rbindlist.o reorder.o shellsort.o shift.o snprintf.o subset.o transpose.o types.o uniqlist.o utils.o vecseq.o wrappers.o -lomp -L/opt/local/lib -lz -F/Library/Frameworks/R.framework/.. -framework R PKG_CFLAGS = -Xclang -fopenmp -I/opt/local/include PKG_LIBS = -lomp -L/opt/local/lib -lz if [ "data.table.so" != "data_table.so" ]; then mv data.table.so data_table.so; fi if [ "" != "Windows_NT" ] && [ `uname -s` = 'Darwin' ]; then install_name_tool -id data_table.so data_table.so; fi installing to /Library/Frameworks/R.framework/Versions/4.5-x86_64/Resources/library/00LOCK-data.table/00new/data.table/libs ** R ** inst ** byte-compile and prepare package for lazy loading ** help *** installing help indices ** building package indices ** installing vignettes ** testing if installed package can be loaded from temporary location Error: package or namespace load failed for ‘data.table’ in dyn.load(file, DLLpath = DLLpath, ...): unable to load shared object '/Library/Frameworks/R.framework/Versions/4.5-x86_64/Resources/library/00LOCK-data.table/00new/data.table/libs/data_table.so': dlopen(/Library/Frameworks/R.framework/Versions/4.5-x86_64/Resources/library/00LOCK-data.table/00new/data.table/libs/data_table.so, 0x0006): symbol not found in flat namespace '___kmpc_dispatch_deinit' Error: loading failed Execution halted ERROR: loading failed * removing ‘/Library/Frameworks/R.framework/Versions/4.5-x86_64/Resources/library/data.table’ The downloaded source packages are in ‘/private/var/folders/d5/sbs6108j6qd9jw7g652bm9sr0000gn/T/RtmpqcFVH3/downloaded_packages’ Warning message: In install.packages("data.table", lib = .libPaths()[2], type = "source") : installation of package ‘data.table’ had non-zero exit status ______________________________________________ [email protected] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. 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