Hannorein Rebound Versions Save

• WHFast512 now support the integration of 2 and 4 planet systems in parallel. Providing a speed up of up to 10x.
• The sqrt7 function used by IAS15 now support a wider range of input arguments.

• Removed distutils requirement in preparation for python 3.12.
• Removed rebound.InterruptiblePool as it no longer works with recent python version. Updated examples.
• Added Holmberg example.
• Added adaptive_mode==3 for IAS15 (Aarseth 1985).

• Implemented own fmemopen implementation on MacOS. This is mainly to appease conda-forge builds.
• Improved sqrt7 algorithm allows larger convergence interval.

• Improved support for reading old and corrupted SimulationArchives.
• Renamed ri_ias15.epsilon_global to ri_ias15.adaptive_mode.
• Added new timestep method for IAS15 ri_ias15.adaptive_mode = 2. This is experimental for now. Details to be described in Pham, Rein & Spiegel (in prep).
• Added unit tests to check for fused multiply add instruction (these break reproducibility).
• Added phony target in C Makefile to force rebuilding librebound whenever building examples.

• Native Windows support. REBOUND can now be built natively on Windows (without WSL) using the Microsoft Visual Studio Compiler.
• Python Wheels are now provided for Linux, MacOS, and Windows. This should significantly speed up the installation process on a wide variety of systems.

• In python, Simulation and Particle objects are now picklable. Similar to loading Simulations from a binary file, when unpickling Simulations, function pointers will need to be re-set manually.
• The difference between simulations can now be printed out in a human readable form. Python syntax: sim.diff(sim2). C syntax: reb_diff_simulations(sim2, sim1, 1).
• The POSIX function fmemopen() is now required to compile REBOUND. This should not affect many users. However, if you are using macOS, the version needs to be >= 10.13 (this version of macOS, High Sierra, was released in 2017).
• Internal changes on how SimulationArchives are written.
• Reading SimulationArchives with version < 2 is no longer supported.
• Internal variable names that represent the size of allocated buffers now consistently include the text allocated_N.
• The TES (Terrestrial Exoplanet Integrator) has been removed. If you wish to use TES, you will need to checkout an earlier version.

Fixes more signed/unsigned int issues to reduce compiler warnings. Fixes a previous bug when using MPI.

Fixes various signed/unsigned int issues throughout the code. This should not affect any calculation but greatly reduce compiler warnings, especially if compiled with the "-Wextra" flag.

• Added support for AVX512 and FFP_CONTRACT_OFF environment variables when using pip to install REBOUND.

Added WHFast512 integrator (Javaheri, Rein, Tamayo 2023)