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enable tbb by default on musl-based linux (e.g. alpine) #263

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Merged
kevinushey merged 1 commit into from
Jul 24, 2026
+4 −1
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enable tbb by default on musl-based linux (e.g. alpine) #263

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5 changes: 4 additions & 1 deletion inst/include/RcppParallel.h
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,11 @@
// (NOTE: Windows TBB is temporarily opt-in for packages for
// compatibility with CRAN packages not previously configured
// to link to TBB in Makevars.win)
// NOTE: match Linux via __linux__ rather than __gnu_linux__; the latter is
// only defined by glibc toolchains, which left TBB disabled by default on
// musl-based systems such as Alpine Linux (https://github.com/RcppCore/RcppParallel/issues/231)
#ifndef RCPP_PARALLEL_USE_TBB
# if defined(__APPLE__) || defined(__gnu_linux__) || (defined(__sun) && defined(__SVR4) && !defined(__sparc))
# if defined(__APPLE__) || defined(__linux__) || (defined(__sun) && defined(__SVR4) && !defined(__sparc))
# define RCPP_PARALLEL_USE_TBB 1
# else
# define RCPP_PARALLEL_USE_TBB 0
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