[ci skip] Add more changes to RELEASE.txt

This change includes more parts of CHANGES.txt that seemed to be important.

1 files changed, 43 insertions, 9 deletions

diff --git a/RELEASE.txt b/RELEASE.txt
index 6729ce8..592ed19 100755
--- a/RELEASE.txt
+++ b/RELEASE.txt
@@ -20,7 +20,15 @@
     - Add CompilationDatabase() builder in compilation_db tool. Contributed by MongoDB.
       Setting COMPILATIONDB_USE_ABSPATH to True|False controls whether the files are absolute or relative
       paths.  Address Issue #3693 and #3694 found during development.
-
+    - Extended `Environment.Dump()` to select a format to serialize construction variables (pretty, json).
+    - New conditional C Scanner (`SCons.Scanner.C.CConditionalScanner()`)
+      which interprets C/C Preprocessor conditional syntax (#ifdef, #if, #else,
+      #elif, #define, etc.)
+    - Experimental New Feature: Enable caching MSVC configuration
+      If SCONS_CACHE_MSVC_CONFIG shell environment variable is set,
+      SCons will cache the results of past calls to vcvarsall.bat to
+      a file; integrates with existing memoizing of such vars.
+    - Preliminary Python 3.9 support.
 
   DEPRECATED FUNCTIONALITY
 
@@ -51,7 +59,27 @@
       and skipping Python 3.8's new pickle protocol 5 whose main advantage is for out-of-band data buffers.
       NOTE: If you used Python 3.8 with SCons 3.0.0 or above, you may get a a pickle protocol error. Remove your
       .sconsign.dblite. You will end up with a full rebuild.
-
+    - MSVC updates: When there are multiple product installations (e.g, Community and
+      Build Tools) of MSVC 2017 or MSVC 2019, an Enterprise, Professional,
+      or Community installation will be selected before a Build Tools installation when
+      "14.1" or "14.2" is requested, respectively. (GH Issue #3699).
+    - MSVC updates: When there are multiple product installations of MSVC 2017 (e.g.,
+      Community and Express), 2017 Express is no longer returned when "14.1" is
+      requested.  Only 2017 Express will be returned when "14.1Exp" is requested.
+      (GH Issue #3699).
+    - MSVC updates: pass on VSCMD_DEBUG and VSCMD_SKIP_SENDTELEMETRY to msvc
+      tool setup if set in environment. Add Powershell to default env
+      (used to call telemetry script).
+    - Renamed as.py to asm.py and left redirecting tool.  'as' is a reserved word and so
+      changing the name was required as we wanted to import symbols for use in compilation_db
+      tool.
+    - Add no_progress (-Q) option as a set-able option. However, setting it in the
+      SConstruct/SConscript will still cause "scons: Reading SConscript files ..." to be
+      printed, since the option is not set when the build scripts first get read.
+    - Docbook builder provides a fallback if lxml fails to generate
+      a document with tostring().
+    - SubstitutionEnvironment and OverrideEnvironment now have keys()
+      and values() methods to better emulate a dict (already had items()).
 
   FIXES
 
@@ -69,6 +97,13 @@
         or
         conftest_68b375d16e812c43e6d72d6e93401e7c_0.o
         conftest_68b375d16e812c43e6d72d6e93401e7c_0_5713f09fc605f46b2ab2f7950455f187 (for executable)
+    - Updated documentation toolchain to work properly under Python3, also
+      removed libxslt support from the Docbook Tool. (issue #3580)
+    - Fix broken clang + MSVC 2019 combination by using MSVC configuration logic to
+      propagate 'VCINSTALLDIR' and 'VCToolsInstallDir' which clang tools use to locate
+      header files and libraries from MSVC install. (Fixes GH Issue #3480)
+    - Fix Github Issue #2904 - Provide useful error message when more than one Configure Contexts are opened.
+      Only one open is allowed. You must call conf.Finish() to complete the currently open one before creating another
 
   IMPROVEMENTS
 
@@ -87,13 +122,12 @@
 
   DOCUMENTATION
 
-    - List any significant changes to the documentation (not individual
-      typo fixes, even if they're mentioned in src/CHANGES.txt to give
-      the contributor credit)
-
-  DEVELOPMENT
-
-    - List visible changes in the way SCons is developed
+    - Significant rework of documentation: API docs are now generated
+      using Sphinx; manpage and user guide now use more "standard"
+      markup elements (which could facilitate later conversion to a
+      different doc format, should that choice be made); significant
+      rewordings in manpage.  Manpage Examples moved to an external
+      repository / website (scons-cookbook.readthedocs.io).
 
   Thanks to CURLY, LARRY, and MOE for their contributions to this release.
   Contributors are listed alphabetically by their last name.