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pat-s 6df945d147 fix(patches): build RcppParallel against system oneTBB instead of disabling TBB (#135) ... ## What Replace RcppParallel's `disable-tbb` registry patch with `system-tbb`: build RcppParallel against the system oneTBB instead of stripping TBB entirely. ## Why `disable-tbb` skipped the bundled Intel TBB build by forcing the TinyThread backend, which also removed RcppParallel's TBB linkage. That broke every dependent that links TBB through `RcppParallelLibs()` -- `rstan` and the whole Stan cluster -- with `symbol not found: tbb::detail::r1::observe`. This is the root cause behind the large "blocked on RcppParallel" / rstan clusters (issues #115, #120): the packages were not individually broken, they were all waiting on one TBB-linkage regression. ## Change `system-tbb.patch` leaves `USE_TBB` unset (so the bundled build is still skipped on musl and g++ 15) but keeps the TBB backend and links the system oneTBB now shipped in the build-env images: ``` PKG_CXXFLAGS += -DRCPP_PARALLEL_USE_TBB=1 -DTBB_SUPPRESS_DEPRECATED_MESSAGES=1 -DTBB_INTERFACE_NEW PKG_LIBS += -ltbb -ltbbmalloc ``` Scoped to `alpine` + `ubuntu-2604`, the only platforms where the bundled build fails; redhat and older ubuntus keep the bundled TBB. ## Requires The companion image change that exports `TBB_INC`/`TBB_LIB` so `RcppParallelLibs()` hands the system-TBB flags to dependents: build-env-images PR #12. Both must ship together. ## Verified In `build-env-alpine:3.24` with the new images: - RcppParallel builds against oneTBB 2022, no ABI errors, patch applies cleanly to the target clone. - `RcppParallelLibs()` returns `-L/usr/lib -Wl,-rpath,/usr/lib -ltbb -ltbbmalloc`. - rstan links (`-ltbb -ltbbmalloc`) and loads with no missing symbol -- `* DONE (rstan)`, trial build exit 0. Reviewed-on: #135		2026-07-20 09:56:21 +00:00
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system-tbb.patch	fix(patches): build RcppParallel against system oneTBB instead of disabling TBB (#135)	2026-07-20 09:56:21 +00:00