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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Undefined symbol on MacOS with strict linking","articleBody":"Compiling on MacOS without the `-undefined dynamic_lookup` linker flag reveals an undefined symbol. You can test this like so:\r\n\r\n```sh\r\nsed -i.bak 's/-undefined dynamic_lookup//g' $(R RHOME)/etc/Makeconf\r\n```\r\n\r\nAnd then installing from source will fail:\r\n\r\n```\r\n** configured file: 'R/tbb-autodetected.R.in' =\u003e 'R/tbb-autodetected.R'\r\n  *** configured file: 'src/install.libs.R.in' =\u003e 'src/install.libs.R'\r\n  *** configured file: 'src/Makevars.in' =\u003e 'src/Makevars'\r\n  ** finished configure for package 'RcppParallel'\r\n  ** libs\r\n  using C++ compiler: ‘Apple clang version 14.0.0 (clang-1400.0.29.202)’\r\n  using SDK: ‘’\r\n  (tbb) Building TBB using bundled sources ...\r\n  OS: macos\r\n  arch=intel64\r\n  compiler=clang\r\n  runtime=cc14.0.0_os12.7.2\r\n  tbb_build_prefix=macos_intel64_clang_cc14.0.0_os12.7.2\r\n  work_dir=/private/var/folders/qv/pdh5wsgn0lq3dp77zj602b5c0000gn/T/RtmpXzRtgl/R.INSTALL3d205139f0cb/RcppParallel/src/build/macos_intel64_clang_cc14.0.0_os12.7.2_release\r\n  (tbb) TBB compilation finished successfully.\r\n  clang++ -arch x86_64 -std=gnu++17 -I\"/Library/Frameworks/R.framework/Resources/include\" -DNDEBUG -I../inst/include  -I/opt/R/x86_64/include   -std=gnu++11 -DRCPP_PARALLEL_USE_TBB=1 -DTBB_SUPPRESS_DEPRECATED_MESSAGES=1 -fPIC  -falign-functions=64 -Wall -g -O2  -c init.cpp -o init.o\r\n  clang++ -arch x86_64 -std=gnu++17 -I\"/Library/Frameworks/R.framework/Resources/include\" -DNDEBUG -I../inst/include  -I/opt/R/x86_64/include   -std=gnu++11 -DRCPP_PARALLEL_USE_TBB=1 -DTBB_SUPPRESS_DEPRECATED_MESSAGES=1 -fPIC  -falign-functions=64 -Wall -g -O2  -c options.cpp -o options.o\r\n  clang++ -arch x86_64 -std=gnu++17 -dynamiclib -Wl,-headerpad_max_install_names -L/Library/Frameworks/R.framework/Resources/lib -L/opt/R/x86_64/lib -o RcppParallel.so init.o options.o -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation\r\n  Undefined symbols for architecture x86_64:\r\n    \"tbb::interface7::internal::task_arena_base::internal_max_concurrency(tbb::interface7::task_arena const*)\", referenced from:\r\n        _defaultNumThreads in options.o\r\n  ld: symbol(s) not found for architecture x86_64\r\n  clang: error: linker command failed with exit code 1 (use -v to see invocation)\r\n  make: *** [RcppParallel.so] Error 1\r\n  ERROR: compilation failed for package ‘RcppParallel’\r\n```\r\n\r\nThis is important when cross compiling (for example on p3m), otherwise the resulting binary cannot be loaded.\r\n","author":{"url":"https://github.com/jeroen","@type":"Person","name":"jeroen"},"datePublished":"2024-01-02T17:31:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/206/RcppParallel/issues/206"}