
## RcppParallel 6.0.0

* RcppParallel no longer includes tbb headers as part of the RcppParallel/TBB.h
  header, and instead only exposes its TBB-specific APIs for parallel work.
  
* RcppParallel now bundles oneTBB 2022.0.0. Note that the TBB ABI has changed;
  packages which depend on RcppParallel may need to be rebuilt.
  
* On Windows, RcppParallel now uses the copy of TBB provided by Rtools.
  If TBB is not available, RcppParallel will use only the fallback 'tinythread'
  implementation. In practice, this implies that RcppParallel will now only
  provide a TBB backend with R (>= 4.2.0).

* Fixed builds under wasm/webR. (#237; @andrjohns)

* Fixed compilation with clang-19 on Windows aarch64. (#235, #236; @andrjohns)

* Fixed TBB library lookup on Windows, and removed the obsolete
  `TBB_USE_GCC_BUILTINS` flag for Windows ARM64. TBB is statically linked
  on Windows, so the package no longer tries to load TBB libraries there
  at load time. (#241; @andrjohns)

## RcppParallel 5.1.11-2

* Resolved compilation warnings with C++20 and Apple clang 21.

## RcppParallel 5.1.11

* Compatibility fixes for LLVM 21.

## RcppParallel 5.1.10

* Fixed an issue where packages linking to RcppParallel could inadverently
  depend on internals of the TBB library available during compilation, even
  if the package did not explicitly use TBB itself.

## RcppParallel 5.1.9

* RcppParallel no longer passes `-rpath` when building / linking on Windows.
  This fixes build issues when building RcppParallel when using the LLVM
  linker on Windows. (@kalibera)
  
## RcppParallel 5.1.8

* RcppParallel now explicitly links to the bundled copy of TBB on macOS. (#206; @jeroen)

## RcppParallel 5.1.7

* Remove deprecated `std::iterator`. (#192; @Enchufa2)

## RcppParallel 5.1.6

* Patch for TBB to allow compilation with gcc-13.

* Fixed a memory leak that could occur when using TinyThread on POSIX systems.
  (#185; @dipertix and and @kevinushey)

## RcppParallel 5.1.5

* Patches to ensure compatibility with the R 4.2.0 UCRT toolchain on Windows,
  adapted from patches contributed by Tomas Kalibera.

* Fixed an issue where setting `TBB_ROOT` (or `TBB_INC` / `TBB_LIB`) would
  copy rather than symlink the associated libraries. (#161)

## RcppParallel 5.1.4

* Fixed an issue causing client packages of RcppParallel to fail to compile
  on Solaris.

## RcppParallel 5.1.3

* Fixed an issue that prevented compilation of RcppParallel with R (< 4.0.0)
  of R on Windows.

* The `RCPP_PARALLEL_USE_TBBMALLOC_PROXY` environment variable can now be used
  to control whether RcppParallel loads the `tbbmalloc_proxy` library on load.
  See https://www.threadingbuildingblocks.org/docs/help/tbb_userguide/Automically_Replacing_malloc.html
  for more information.

## RcppParallel 5.1.2

* `RcppParallel` gains the `tbbLibraryPath()` function, to be used when attempting
  to query the location of the TBB libraries that `RcppParallel` has been
  configured to use. This may be useful for R packages which wish to explicitly
  use, or link to, these libraries.

## RcppParallel 5.1.1

* Updated bundled version of TBB (Intel TBB 2019 Update 8).

* RcppParallel can now be configured to use an external copy of TBB, via the
  `TBB_LIB` and `TBB_INC` environment variables. These should be set to the
  directories containing the TBB libraries and headers, respectively.
  
* Added support for the latest versions of Intel oneAPI TBB / oneTBB.

* Updated TBB functionality for the new interface.

* Falling back to building TBB from local source code.

* Backward TBB compatibility based on `__TBB_tbb_stddef_H`.

* Resolved conflicts between system and local TBB headers.

* Fixed URLs, used HTTPS, and minor cleanups.

* Updated package DESCRIPTION and bumped version.

* `setThreadOptions(...)` can again be called multiple times per session.
  The requested number of threads will be used for invocations to `parallelFor()`
  and `parallelReduce()` that don't explicitly request a specific number of threads.
  
* The `parallelFor()` and `parallelReduce()` functions gain the `numThreads`
  argument, allowing one to limit the number of threads used for a
  particular computation.

## RcppParallel 5.0.3

* Fixed compilation on macOS M1 machines.

## RcppParallel 5.0.2

* `setThreadOptions(...)` can now only be called once per session, to avoid
  segfaults when compiling RcppParallel / TBB with gcc 10.1. Subsequent
  calls to `setThreadOptions(...)` are ignored.

## RcppParallel 5.0.1

* Fixed compilation issue on OpenSUSE Tumbleweed with -flto=auto

* Fixed compilation when CPPFLAGS = -I/usr/local/include and a version
  of libtbb is installed there

## RcppParallel 5.0.0

* RcppParallel backend can now be customized with RCPP_PARALLEL_BACKEND
  environment variable (supported values are 'tbb' and 'tinythread')
  
* Fixed issue when compiling RcppParallel on macOS Catalina

* Fixed issue when compiling RcppParallel with Rtools40

## RcppParallel 4.4.4

* Fixed an issue when compiling RcppParallel with clang-9 on Fedora

## RcppParallel 4.4.3

* Suppress gcc-9 warnings related -Wclass-memaccess

* Added TBB headers for serial TBB operations (#90, @mikejiang)

* Fixed row iterator constructor (#87, @wtianyi)

* Fixed compilation on FreeBSD

## RcppParallel 4.4.2

* Suppress gcc-8 warnings related to -Wclass-memaccess

* Use PKG_CXXFLAGS rather than PKG_CPPFLAGS

* Remove unused dependency on the BH package

## RcppParallel 4.4.1

* Ensure user-specified R configuration passed to TBB

* Work around warnings emitted by gcc 8

## RcppParallel 4.4.0

* Respect user-defined compiler settings (e.g. from ~/.R/Makevars).

* Remove TBB's attempts to suppress compiler diagnostics.

* Allow setting the number of threads to use via RCPP_PARALLEL_NUM_THREADS
  environment variable.

* Update to TBB 2018 Update 1.

* Add native registration of compiled functions.

## RcppParallel 4.3.20

* Add support for Rtools 3.3 w/ GCC 4.9

## RcppParallel 4.3.14

* Add support for TBB on Solaris

* Fix failure to compile on OS X Snow Leopard R toolchain

* Add const and non-const operator[] for RMatrix class

## RcppParallel 4.3.8

* Add tbbmalloc library

* Correctly pass clang to TBB configure when R is using clang

## RcppParallel 4.3.6

* Support for TBB on Windows

## RcppParallel 4.3.3

* Update to TBB 4.3 (fixes clang compilation error in platform.h)

* Forward CXX to TBB Makefile

## RcppParallel 4.2.5

* Initial release
