Update 'Building rootfs tarballs'

Building-rootfs-tarballs.md

@@ -12,16 +12,16 @@ To do everything manually, do the following:
 
 3 - Create an environment variable for ease of use
 
-	`$ export EVEREST=/mnt/everest # replace /mnt/everest with the path to your workspace`
+	$ export EVEREST=/mnt/everest # replace /mnt/everest with the path to your workspace
 
 4 - Change permissions of the workspace
 
-	`# chmod 777 ${EVEREST}`
+	# chmod 777 ${EVEREST}
     
 5 - Create a sources directory to store packages
-	`$ mkdir -v ${EVEREST}/sources`
+	$ mkdir -v ${EVEREST}/sources
     
-6 - Download the latest versions of the following programs:
+6 - Reference for programs in use
 	- binutils
     - busybox
     - everest-bootscripts
@@ -33,20 +33,85 @@ To do everything manually, do the following:
     - mpfr
     - musl
     
+Syntax may differ between versions. The following versions were used for this guide:
+	- binutils 2.33.1
+    - busybox 1.24.2
+    - everest-bootscripts git
+    - gcc 9.4.0
+    - gmp 6.1.2
+    - iana-etc 2.30
+    - linux 4.19.88
+    - mpc 1.1.0
+    - mpfr 4.0.2
+    - musl 1.2.3
+    
 7 - Download the following patch for iana-etc:  http://patches.clfs.org/embedded-dev/iana-etc-2.30-update-2.patch
 
 8 - Ensure the EVEREST environment variable is set up properly
 
-	`$ echo ${EVEREST}`
+	$ echo ${EVEREST}
 
 9 - Create the build user
 
-	`# groupadd everest`
+	# groupadd everest
-    `# useradd -s /bin/bash -g everest -m -k /dev/null everest`
+    # useradd -s /bin/bash -g everest -m -k /dev/null everest
-    `# passwd everest`
+    # passwd everest
-    `# chown -Rv everest ${EVEREST}`
+    # chown -Rv everest ${EVEREST}
 
 10 - Login as the new user
 
-	`su - everest`
+	$ su - everest
+   
+11 - Create a new bash profile
+
+	$ cat > ~/.bash_profile << "EOF"
+	exec env -i HOME=${HOME} TERM=${TERM} PS1='\u:\w\$ ' /bin/bash
+	EOF
     
+12 - Create a new bashrc
+
+	$ cat > ~/.bashrc << "EOF"
+	set +h
+	umask 022
+	EVEREST=/mnt/everest
+	LC_ALL=POSIX
+	PATH=${EVEREST}/cross-tools/bin:/bin:/usr/bin
+	export EVEREST LC_ALL PATH
+	EOF
+    
+13 - Source the new bash profile
+
+	$ source ~/.bash_profile
+
+14 - Disable CFLAGS, which will cause problems with cross-compilation tools.
+
+	$ unset CFLAGS
+    $ echo unset CFLAGS >> ~/.bashrc
+
+15 - Set host, target, CPU type, and architecture. This guide assumes you are building for a k8 cpu and x86 target.
+
+	$ export EVEREST=$(echo ${MACHTYPE} | sed "s/-[^-]*/-cross/")
+    $ export EVEREST_TARGET="x86_64-linux-musl"
+    $ export EVEREST_CPU="k8"
+    $ export EVEREST_ARCH="x86"
+
+16 - Add the following variables to the build user's ~/.bashrc
+
+	$ echo export EVEREST_HOST=\""${EVEREST_HOST}\"" >> ~/.bashrc
+	$ echo export EVEREST_TARGET=\""${EVEREST_TARGET}\"" >> ~/.bashrc
+	$ echo export EVEREST_ARCH=\""${EVEREST_ARCH}\"" >> ~/.bashrc
+	$ echo export EVEREST_CPU=\""${EVEREST_CPU}\"" >> ~/.bashrc
+    
+17 - Create the cross tools directory
+
+	$ mkdir -p ${EVEREST}/cross-tools/${EVEREST_TARGET}
+    
+18 - Build the cross-toolchain
+	$ cd ${EVEREST}/sources
+    $ git clone https://git.everestlinux.org/EverestLinux/musl-cross-make
+    $ cd musl-cross-make
+    $ make
+    $ make install
+    *Note: to speed up this process, prefix both make commands with -jX, replacing X with your CPU's cores + threads*
+    
+19 - Install