From bbcacbfca96de61adc044589416f87db943021c6 Mon Sep 17 00:00:00 2001
From: shikokuchuo <53399081+shikokuchuo@users.noreply.github.com>
Date: Fri, 31 Jan 2025 12:21:01 +0000
Subject: [PATCH] update readme and add news item

---
 NEWS.md    |  4 ++++
 README.Rmd |  4 ++--
 README.md  | 14 ++++++++------
 3 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/NEWS.md b/NEWS.md
index f7eaf065a..0f422e4ad 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,9 @@
 # nanonext 1.5.0.9000 (development)
 
+#### Updates
+
+* Unified Windows build system now attempts to compile 'libmbedtls' and 'libnng' from source even on R <= 4.1 using Rtools40 or earlier.
+
 # nanonext 1.5.0
 
 #### Library Updates
diff --git a/README.Rmd b/README.Rmd
index 843950fd3..d0ddfb9d7 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -156,9 +156,9 @@ As system libraries, 'libnng' is available as libnng-dev (deb) or nng-devel (rpm
 
 #### Windows
 
-For R >= 4.2 using the 'Rtools42' or newer toolchains, 'libnng' v1.10.1 and 'libmbedtls' v3.6.2 will be automatically compiled from the package sources during installation.
+On Windows, 'libnng' v1.10.1 and 'libmbedtls' v3.6.2 will be compiled from the package sources during installation and hence requires the 'Rtools' toolchain.
 
-For previous R versions, pre-compiled 'libnng' v1.10.1 and 'libmbedtls' v3.6.2 libraries are downloaded and used for installation instead.
+For R >= 4.2 using the 'Rtools42' or newer toolchains, the prerequisite 'cmake' is included. For previous R versions using 'Rtools40' or earlier, it may be necessary to separately install a version of 'cmake' in Windows and ensure that it is added to your system's `PATH`.
 
 ### Acknowledgements and Links
 
diff --git a/README.md b/README.md
index 4efb34a00..d9e54b6b3 100644
--- a/README.md
+++ b/README.md
@@ -201,12 +201,14 @@ OpenCSW - refer to the ‘cmake’ website for the latest source file.*
 
 #### Windows
 
-For R \>= 4.2 using the ‘Rtools42’ or newer toolchains, ‘libnng’ v1.10.1
-and ‘libmbedtls’ v3.6.2 will be automatically compiled from the package
-sources during installation.
-
-For previous R versions, pre-compiled ‘libnng’ v1.10.1 and ‘libmbedtls’
-v3.6.2 libraries are downloaded and used for installation instead.
+On Windows, ‘libnng’ v1.10.1 and ‘libmbedtls’ v3.6.2 will be compiled
+from the package sources during installation and hence requires the
+‘Rtools’ toolchain.
+
+For R \>= 4.2 using the ‘Rtools42’ or newer toolchains, the prerequisite
+‘cmake’ is included. For previous R versions using ‘Rtools40’ or
+earlier, it may be necessary to separately install a version of ‘cmake’
+in Windows and ensure that it is added to your system’s `PATH`.
 
 ### Acknowledgements and Links