Update changelog

docs/changelog.md

@@ -8,29 +8,37 @@ SPDX-FileCopyrightText: 2011-2020 Carles Fernandez-Prades <carles.fernandez@cttc
 )
 <!-- prettier-ignore-end -->
 
-## Unreleased
+## [Unreleased](https://github.com/gnss-sdr/gnss-sdr/tree/next)
 
 ### Improvements in Efficiency:
 
 - Faster internal handling of `Gnss_Synchro` objects by reducing the amount of
   copying via adding `noexcept` move constructor and move assignment operators,
   so the move semantics are also used in STL containers.
+- All `std::endl` have been replaced by the `'\n'` character, since there is no
+  need to always flush the stream.
+- Performed a stack reordering of class members that seems to offer
+  statistically better performance in some processor architectures and/or
+  compilers.
 - Add building option `ENABLE_STRIP` to generate stripped binaries (that is,
   without debugging symbols), smaller in size and potentially providing better
   performance than non-stripped counterparts. Only for GCC in Release build
   mode. Set to `OFF` by default.
+- Add building option `ENABLE_BENCHMARKS`, which activates the building of
+  benchmarks for some code snippets, making it easier to developers to benchmark
+  different implementations for the same purpose. Set to `OFF` by default.
 
 ### Improvements in Maintainability:
 
-- The software can now be built against the GNU Radio 3.9 API that uses C++11
+- Improved usage of smart pointers to better express ownership of resources.
-  smart pointers instead of Boost smart pointers.
+- Add definition of `std::make_unique` for buildings with C++11, and make use of
-- The software can now be built against Boost <= 1.73 (minimum version: 1.53).
-- Removed python six module as a dependency if using Python 3.x.
-- Improved usage of smart pointers to better express ownership.
-- Add definition of std::make_unique for buildings with C++11, and make use of
   it along the source code.
 - Private members in headers have been sorted by type and size, minimizing
   padding space in the stack and making the files more readable for humans.
+- The software can now be built against the GNU Radio 3.9 API that uses standard
+  library's smart pointers instead of Boost's. Minimum GNU Radio required
+  version still remains at 3.7.3.
+- The software can now be built against Boost <= 1.73 (minimum version: 1.53).
 - Fixed building with GCC 10 (gcc-10 and above flipped a default from `-fcommon`
   to `-fno-common`, causing an error due to multiple defined lambda functions).
 - Fixed warnings risen by GCC 10 and Clang 10.
@@ -39,12 +47,11 @@ SPDX-FileCopyrightText: 2011-2020 Carles Fernandez-Prades <carles.fernandez@cttc
   requirements, with more intuitive naming for variables; fixed the
   `ENABLE_CLANG_TIDY` option; better GFORTRAN module; and broader adoption of
   the modern per-target approach.
-- Add a new building option `ENABLE_BENCHMARKS` which activates the building of
-  benchmarks for some code snippets.
 
 ### Improvements in Portability:
 
 - The software can now be cross-compiled on Petalinux environments.
+- Removed python six module as a dependency if using Python 3.x.
 - Make use of `std::span` if the compiler supports it, and use gsl-lite as a
   fallback. The latter has been updated to version
   [0.37.0](https://github.com/gsl-lite/gsl-lite/releases/tag/0.37.0).
@@ -76,21 +83,24 @@ SPDX-FileCopyrightText: 2011-2020 Carles Fernandez-Prades <carles.fernandez@cttc
   generated binaries is maintained if the building is done from any source tree
   subfolder (for instance, `gnss-sdr/build`): in that case, binaries are stored
   in the source tree (under `gnss-sdr/install`).
-- Updated version of the Contributor Covenant to version 2.0.
-- Added a Matlab script to quantize the input signal with a given number of bits
-  per sample.
-- Fixed a bug in signal sources that made the number of samples parameter
-  ignored when too large (that is, larger than 2^31-1).
-- Fixed the building option `-DENABLE_LOG=OFF`, which strips internal logging
-  from the binary and can help to reduce its size and speed up the receiver. In
-  binaries with enabled logging, it can be still disabled by passing the command
-  line flag `--minloglevel=3` to `gnss-sdr`.
 - Defined new `GNSS-SDR.GPS_banned_prns`, `GNSS-SDR.Galileo_banned_prns`,
   `GNSS-SDR.Glonass_banned_prns` and `GNSS-SDR.Beidou_banned_prns` configuration
   parameters. The user can specify lists of satellites that will not be
   processed (e.g., `GNSS-SDR.Galileo_banned_prns=14,18` since Galileo E14 and
   E18 satellites are not usable for PVT). Satellites on those lists will never
   be assigned to a processing channel.
+- Added a Matlab script to quantize the input signal with a given number of bits
+  per sample.
+- Fixed the building option `-DENABLE_LOG=OFF`, which strips internal logging
+  from the binary and can help to reduce its size and ultimately to speed up the
+  receiver. In binaries with enabled logging, it still can be disabled by
+  passing the command line flag `--minloglevel=3` to `gnss-sdr`. This can be
+  relevant in embedded devices with scarce storage capabilities.
+- Fixed a bug in the Signal Sources configuration that made the number of
+  samples parameter ignored when too large (that is, when set larger than
+  2^31-1). Now the `samples` parameter accepts values up to 2^64-1, that is,
+  18,446,744,073,709,551,615 samples.
+- Updated version of the Contributor Covenant to version 2.0.
 
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