+SimGrid (3.26.1) NOT RELEASED YET (v3.27 expected March 20. 2021, 09:37 UTC)
+
+User-visible changes:
+ - Removed some option aliases that were deprecated since v3.23 (June 2019)
+ - 'verbose-exit' is now 'debug/verbose-exit'
+ - 'simix/breakpoint' is now 'debug/breakpoint'
+ - 'clean-atexit' is now 'debug/clean-atexit'
+ - Removed all that was related to the "Storage" type in all APIs and bindings.
+ "Disks" have been introduced more than a year ago to replace them for the better.
+ It's time to finish this replacement.
+
+S4U:
+ - Define new template functions Mailbox::get_unique(), returning a std::unique_ptr.
+ - Functions Mailbox::get() and Mailbox::get_async() are now templated with the
+ type of the pointee. Untyped functions are deprecated. Use Mailbox::get<void>()
+ or Mailbox::get_async<void>() if you really want to play with void*.
+ - Unify the interface of Activity::on_{start/activity}
+ - New function: Comm::get_dst_data()
+ - New function: Comm::set_payload_size() to set the amount of bytes to simulate.
+ - New functions: Comm::sendto_{init,async} to initiate a communication
+ on between two (possibly remote) hosts.
+
+XBT:
+ - Drop simgrid::xbt::demangle. Please use boost::core::demangle instead.
+
+Documentation:
+ - New section: Configuring the logs from the command line.
+ - New section: Programming API of logs.
+
+----------------------------------------------------------------------------
+
+SimGrid (3.26) December 15. 2020
+
+The Release release (the French lockdown was eased today).
+
+Important user-visible changes:
+ - SimGrid now requires a compiler with C++14 support.
+ Sibling projects should upgrade their FindSimgrid.cmake
+ - Surf precision default value is now 1e-9, instead of 1e-5. This was changed as
+ several users had difficulties to understand issues when using high bandwidth or
+ small latency events. The new value was already the default for SMPI and
+ should not cause too much performance hit. It can change some simulation
+ timings if simulation was skipping a lot of small events (which was actually
+ an issue per see). The old value can be restored with --cfg=surf/precision:1e-5.
+ - On some network models (L07, CM02, LV08), an implicit loopback link is created
+ for local communication. Default bandwidth was 500MBps and latency was 15µs,
+ which was rather bad. Default values have been changed to 10GBps and 0 latency.
+ Options network/loopback-lat and network/loopback-bw have been added to adapt
+ these values if needed. Network and routing models already providing separate
+ loopbacks (clusters and such) are not impacted by this change.
+ - SMPI now adds 16 bytes of header to each message sent, in order to simulate
+ metadata that are added to each MPI message by MPI libraries (tag,
+ src/dest, and communicator information). This may change simulation times
+ for very small message sizes, but should be more realistic.
+
+New features:
+ - New routing 'WiFi' that makes it easier to specify a wifi network zone.
+ - New plugins: wifi_energy and link_load. See the associated examples.
+ - New examples: wifi networks, and communication suspend.
+
+General:
+ - LTO is now enabled for Intel/clang compilers.
+ - LTO behavior on GCC can be parameterized using LTO_EXTRA_FLAG in cmake.
+ Setting it to "auto" will use all available cores, while setting it to n will
+ use n cores to speedup link step (usage: cmake -DLTO_EXTRA_FLAG=4).
+ - Remove obsolete runtime option 'contexts/parallel-threshold'.
+ - Runtime option 'tracing/msg/process' renamed to 'tracing/actor'. The old name
+ has been kept for compatibility.
+ - Finally remove obsolete snake_case() aliases for runtime options.
+ - Further improve the documentation.
+
+S4U:
+ - the on_exit() of each actor is also executed when the simulation deadlocks.
+ - New functions: s4u::Activity:: suspend(), resume() and is_suspended()
+ An example is provided for s4u::Comm but it should work with Exec and Io.
+
+SMPI:
+ - Update proxy apps coverage of new ECP apps: 60+ apps now tested nightly on
+ https://framagit.org/simgrid/SMPI-proxy-apps
+ - MPI/IO: supports names starting with "./"
+ - Fortran: many MPI/IO bindings, support for MPI_UB/LB, C MPI_INT/FLOAT/DOUBLE
+ datatypes.
+ - smpicc/cxx/ff/f90 now will actually perform definition checks at link time. When
+ building shared libraries, this may cause issues, so environment variable
+ SMPI_NO_UNDEFINED_CHECK can be added to disable this.
+ - most temporary files should now be created in /tmp dir (or equivalent).
+ If this one does not allow execution of code (noexec flag), this may cause issues.
+ Please use another tmp directory (using TMPDIR or equivalent system variable)
+ in this case.
+
+Model-Checker:
+ - A large refactoring is ongoing, but this should be transparent for users so far.
+
+XBT:
+ - Drop xbt_str_split().
+
+C binding and interface:
+ - The return type of the sg_actor_on_exit() callbacks is now 'void'
+ (int value was previously ignored)
+ - Many C functions were renamed to follow a common naming style
+ (sg_object_get_something and sg_object_set_something). As usual, the deprecated
+ names are kept until version 3.30.
+ - Many MSG tests were converted to the new S4U's interface in C, that
+ was extended for that.
+
+Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
+ (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub)
+ - FG#41: Add sg_actor_create C interface
+ - FG#43: xbt::random needs some care
+ - FG#48: The Impossible Did Happen (yet again)
+ - FG#50: Suspending an actor executed at the current timestamp fails
+ - FG#52: Zero-seconds timeout : "That's in the past already"
+ - FG#53: Crash while using ns-3 network model
+ - FG#54: How to suspend a comm?
+ - FG!22: Stochastic Profiles
+ - FG!24: Documentation and fix for xbt/random
+ - FG!35: Add a modeling hint for parallel links in doc
+ - FG!36: [xbt/random] Read/Write the state of the RNG
+ - FG!42: Link cumulated load plugin
+ - FG!44: Test condition variable wait_until+notify_all
+ - GF#18137: Allow different stack sizes?
+ - GH#128: Parallelization of simulation with --cfg=contexts/nthreads
+ - GH#139: Allow pthread creation in SMPI
+ - GH#336: Packet-level simulation using SMPI?
+ - GH#345: Error in the LMM while migrating a VM
+ - GH#346: [SMPI] error while loading shared libraries: libsimgrid.so
+ - GH#352: pip install / python setup.py install fail to find pybind11
+ - GH!337: Fix link_energy plugin for wifi platforms
+ - GH!339: Add Mailbox set_receiver method to python binding
+ - GH!344: Cast hugepages macros parameters to int64
+
+----------------------------------------------------------------------------
+
+SimGrid (3.25) February 2. 2020 (aka 02 02 2020)
+
+The Palindrom Day Release.
+
+Important user-visible changes:
+ - Improve the Python usability (stability and documentation).
+ - A nasty synchronization bug was ironed out, see also below.
+ - Python's doc was organized as a separate tree, now integrated with C++.
+ - C bindings of S4U were not part of the doc.
+ - The C++ doc was also improved as methods are now split by theme.
+ - Further deprecate MSG: you now have to pass -Denable_msg=ON to cmake.
+ - This is mandatory to use the Java bindings.
+ - OFF by default; The plan is to completely remove MSG by 2020Q4 or 2021Q1.
+ - SimDAG++: Automatic dependencies on S4U activities (experimental)
+ - Some features are already implemented but not all of them
+ - Cannot block an activity until it's scheduled on a resource
+ - No heterogeneous wait_any() that would mix Exec/Comm/Io activities.
+ - See examples/s4u/{io,exec,comm}-dependent for what's already there.