Changes for backports of R 4.0.0 to bullseye and buster

1 files changed, 29 insertions, 2 deletions

diff --git a/README b/README
index dcd0450..58e26af 100644
--- a/README
+++ b/README
@@ -1,5 +1,5 @@
 This directory contains my scripts to build backports of R software from Debian
-sid to older Debian distributions.
+sid or even experimental to older Debian distributions.
 
 Currently I am using the following setup:
 
@@ -27,9 +27,13 @@ creation under /var/cache/pbuilder, among others:
 With the pbuilderrc mentioned above, this can be created as a normal user with
 
   export ARCH=i386
-  export DIST=buster
+  export DIST=bullseye
   sudo -E pbuilder create
 
+We also need to create the build directory:
+
+  sudo mkdir /var/cache/pbuilder/bullseye-i386/build
+
 When using these scripts on Debian, I used to configure sudo to allow my normal
 user to use pbuilder, apt-get and the backporting scripts. Currently, I have 
 set up my Debian installations using the Ubuntu like sudo configuration that
@@ -37,3 +41,26 @@ I select during the installation.
 
 I am building other architectures on different machines (raspi: armxx) or in a
 local chroot (amd64).
+
+For creating a local chroot, I am using (e.g. for bullseye)
+
+  cd /var/chroot
+  sudo mkdir bullseye-amd64
+  sudo debootstrap bullseye bullseye-amd64 http://ftp.de.debian.org/debian/
+
+Then I add a new entry in /etc/schroot/schroot.conf like
+
+  [bullseye64]
+  description=Debian bullseye 64-bit
+  type=directory
+  profile=default
+  directory=/var/chroot/bullseye-amd64
+
+and use sudo schroot -c bullseye64 to enter it. Within the chroot I install vim
+and add the matching local r-cran repository to /etc/apt/sources.list like
+
+  deb http://localhost/r-cran bullseye-cran40/
+  deb-src http://localhost/r-cran bullseye-cran40/
+
+In the chroot, build-essential and devscripts have to be installed
+