Crosstool environment in a Solaris Container (Zone)

[Jim Connors <James dot Connors at Sun dot COM>]

Not sure if anyone's tried this yet, or for that matter if anyone's 
interested ...

Attached are the steps used to create a crosstool environment inside a 
Solaris zone.   I have not tried building a linux kernel, but have  
successfully built  Java  ME virtual  machines in this  environment.

-- Jim C
Using Crosstool within a Solaris Container (Zone)

Background
Utilities like Crosstool, which make the task of creating cross development environments much more tolerable, also happen to make various linux and GNU assumptions which differ from Solaris.  By introducing new paths and GNU versions of applications, it is possible to mimic this environment in Solaris.   By creating a new Solaris Container (Zone) with this environment, we can isolate these changes without affecting other Solaris system settings.

1. Create a Solaris zone called 'toolzone'

Here's the command-line session for creating the zone (as root in the global zone):

phoenix://# mkdir /zone
phoenix://# zonecfg -z toolzone
toolzone: No such zone configured
Use 'create' to begin configuring a new zone.
zonecfg:toolzone> create
zonecfg:toolzone> set zonepath=/zone/toolzone
zonecfg:toolzone> set autoboot=true
zonecfg:toolzone> add net
zonecfg:toolzone:net> set address=toolzone
zonecfg:toolzone:net> set physical=iprb0
zonecfg:toolzone:net> end
zonecfg:toolzone> info
zonepath: /zone/toolzone
autoboot: true
pool:
inherit-pkg-dir:
        dir: /lib
inherit-pkg-dir:
        dir: /platform
inherit-pkg-dir:
        dir: /sbin
inherit-pkg-dir:
        dir: /usr
net:
        address: toolzone
        physical: iprb0
zonecfg:toolzone> verify
zonecfg:toolzone> commit
zonecfg:toolzone> ^D

phoenix://# zoneadm list -vc
  ID NAME             STATUS         PATH
   0 global           running        /
   - toolzone      configured     /zone/toolzone

phoenix://# time zoneadm -z toolzone install
Preparing to install zone <toolzone>.
Creating list of files to copy from the global zone.
Copying <6666> files to the zone.
Initializing zone product registry.
Determining zone package initialization order.
Preparing to initialize <945> packages on the zone.
Initialized <945> packages on zone.
Zone <toolzone> is initialized.
Installation of <2> packages was skipped.
Installation of these packages generated warnings: <SUNWcsu SUNWsogm>
The file </zone/toolzone/root/var/sadm/system/logs/install_log> contains a log of the zone installation.

real    13m20.721s
user    0m59.799s
sys     2m58.030s

2.  Configure the zone.

2a. Create a zone-specific /usr/bin directory and copy the contents of the global zone's /usr/bin to this new directory.

phoenix://# mkdir -p /zone/toolzone/usr/bin
phoenix://# cd /usr/bin
phoenix://# tar cf - . | (cd /zone/toolzone/usr/bin; tar xfp -)

2b. Create a loopback mount for the toolzone to this new version of /usr/bin:

phoenix://# zonecfg -z toolzone
zonecfg:toolzone> addfs
zonecfg:toolzone:fs> set dir=/usr/bin
zonecfg:toolzone:fs> set special=/zone/toolzone/usr/bin
zonecfg:toolzone:fs> set type=lofs
zonecfg:toolzone:fs> end
zonecfg:toolzone> ^D

2c. Boot and configure the newly created zone:

phoenix://# zoneadm -z toolzone boot
phoenix://# zlogin -C toolzone

2d. Change the path of the default shell to /usr/bin/bash.  This is required for crosstool to operate correctly.

toolzone://# cd /usr/bin
toolzone:bin/# mv sh sh.ORIG
toolzone:bin/# ln -s /usr/bin/bash sh

2e. Create a new user in the toolzone.  For this example, we'll use 'cdc'.  This exercise is left to the user.

toolzone://# grep cdc /etc/passwd
cdc:x:600:10:CDC-HI build user:/export/home/cdc:/usr/bin/bash

2f. Create a directoy called /opt/gnulinks and make sure the 'cdc' user owns it.  This directory will house versions and links  to GNU utilities which differ from their Solaris counterparts.

toolzone://# mkdir /opt/gnulinks
toolzone://# chown cdc:staff /opt/gnulinks
toolzone://# ls -ld /opt/gnulinks
drwxr-xr-x   2 cdc      staff        512 Jun 19 13:14 /opt/gnulinks


3. As the newly created 'cdc' user, configure the zone to build the crosstool environment

3a. Login to the zone as the 'cdc' user.

phoenix://# zlogin -l cdc toolzone
[Connected to zone 'toolzone' pts/6]
Last login: Mon Jun 19 12:57:05 on pts/6
Sun Microsystems Inc.   SunOS 5.10      Generic January 2005
toolzone:~/$

3b. To get a zone-specific prompt, you might want to have an entry in ~cdc/.bash_profile like:

export PS1='\h:\W/\$ '

3c.  Create links in /opt/gnulinks/bin which point to GNU versions of unix utilities

toolzone:bin/$ mkdir -p /opt/gnulinks/bin
toolzone:bin/$ cd /opt/gnulinks/bin
toolzone:bin/$ ln -s /usr/sfw/bin/gar ar
toolzone:bin/$ ln -s /usr/sfw/bin/gm4 m4
toolzone:bin/$ ln -s /usr/sfw/bin/gmake make
toolzone:bin/$ ln -s /usr/sfw/bin/gnm nm
toolzone:bin/$ ln -s /usr/sfw/bin/gobjcopy objcopy
toolzone:bin/$ ln -s /usr/sfw/bin/gobjdump objdump
toolzone:bin/$ ln -s /usr/sfw/bin/gstrings strings
toolzone:bin/$ ln -s /usr/sfw/bin/gstrip strip
toolzone:bin/$ ln -s /usr/sfw/bin/gtar tar
toolzone:bin/$ ln -s /usr/sfw/bin/gthumb thumb
toolzone:bin/$ ls -l /opt/gnulinks/bin
total 20
lrwxrwxrwx   1 cdc      staff         16 Jun 19 13:33 ar -> /usr/sfw/bin/gar
lrwxrwxrwx   1 cdc      staff         16 Jun 19 13:33 m4 -> /usr/sfw/bin/gm4
lrwxrwxrwx   1 cdc      staff         18 Jun 19 13:33 make -> /usr/sfw/bin/gmake
lrwxrwxrwx   1 cdc      staff         16 Jun 19 13:34 nm -> /usr/sfw/bin/gnm
lrwxrwxrwx   1 cdc      staff         21 Jun 19 13:34 objcopy -> /usr/sfw/bin/gobjcopy
lrwxrwxrwx   1 cdc      staff         21 Jun 19 13:34 objdump -> /usr/sfw/bin/gobjdump
lrwxrwxrwx   1 cdc      staff         21 Jun 19 13:34 strings -> /usr/sfw/bin/gstrings
lrwxrwxrwx   1 cdc      staff         19 Jun 19 13:35 strip -> /usr/sfw/bin/gstrip
lrwxrwxrwx   1 cdc      staff         17 Jun 19 13:35 tar -> /usr/sfw/bin/gtar
lrwxrwxrwx   1 cdc      staff         19 Jun 19 13:35 thumb -> /usr/sfw/bin/gthumb

3d. Modify PATH of 'cdc' user by putting the following line in ~cdc/.bash_profile:

export PATH=/opt/gnulinks/bin:/usr/sfw/bin:$PATH

3e.  Build and install GNU specific utilities required for crosstool which are not provided by Solaris.  They include fileutils, gawk(1), patch(1) and sed(1).

toolzone:~/$ which tar
/opt/gnulinks/bin/tar
toolzone:~/$ cd
toolzone:~/$ mkdir GNU

toolzone:~/$ cd ~/GNU
toolzone:GNU/$ wget http://ftp.gnu.org/gnu/fileutils/fileutils-4.1.tar.gz
toolzone:GNU/$ tar xzf fileutils-4.1.tar.gz
toolzone:GNU/$ cd fileutils-4.1
toolzone:fileutils-4.1/$ ./configure --prefix=/opt/gnulinks
toolzone:fileutils-4.1/$ make
toolzone:fileutils-4.1/$ make install

toolzone:~/$ cd ~/GNU
toolzone:GNU/$ wget http://ftp.gnu.org/gnu/gawk/gawk-3.1.5.tar.gz
toolzone:GNU/$ tar xzf gawk-3.1.5.tar.gz
toolzone:GNU/$ cd gawk-3.1.5
toolzone:gawk-3.1.5/$ ./configure --prefix=/opt/gnulinks
toolzone:gawk-3.1.5/$ make
toolzone:gawk-3.1.5/$ make install

toolzone:~/$ cd ~/GNU
toolzone:GNU/$ wget ftp://ftp.gnu.org/gnu/patch/patch-2.5.4.tar.gz
toolzone:GNU/$ tar xzf patch-2.5.4.tar.gz
toolzone:GNU/$ cd patch-2.5.4
toolzone:patch-2.5.4/$ ./configure --prefix=/opt/gnulinks
toolzone:patch-2.5.4/$ make
toolzone:patch-2.5.4/$ make install

toolzone:~/$ cd ~/GNU
toolzone:GNU/$ wget http://ftp.gnu.org/pub/gnu/sed/sed-4.1.4.tar.gz
toolzone:GNU/$ tar sed-4.1.4.tar.gz
toolzone:GNU/$ cd sed-4.1.4
toolzone:sed-4.1.4/$ ./configure --prefix=/opt/gnulinks
toolzone:sed-4.1.4/$ make
toolzone:sed-4.1.4/$ make install

4.  As the 'cdc' user, build a cross development environment using crosstool.  These instructions are taken from http://www.kegel.com/crosstool/crosstool-0.42/doc/crosstool-howto.html#quick

toolzone:~/$ cd
toolzone:~/$ wget http://kegel.com/crosstool/crosstool-0.42.tar.gz
toolzone:~/$ tar -xzvf crosstool-0.42.tar.gz
toolzone:~/$ su -
toolzone://# mkdir /opt/crosstool
toolzone://# chown cdc:staff /opt/crosstool
toolzone://# exit
toolzone:~/$

4.1 As an example, use these configuration files to build a crosstool for a Sharp Zaurus SL-5000D running OpenZaurus 3.5.1:

toolzone:~/$ cd ~/crosstool-0.42
toolzone:crosstool-0.42/$ cat oz-3.5.1.sh
#!/bin/sh
set -ex
TARBALLS_DIR=$HOME/downloads
RESULT_TOP=/opt/crosstool
export TARBALLS_DIR RESULT_TOP
GCC_LANGUAGES="c,c++"
export GCC_LANGUAGES

# Really, you should do the mkdir before running this,
# and chown /opt/crosstool to yourself so you don't need to run as root.
mkdir -p $RESULT_TOP

# Build the toolchain.  Takes a couple hours and a couple gigabytes.

eval `cat arm-softfloat.dat oz-3.5.1.dat` sh all.sh --notest

echo Done.

toolzone:crosstool-0.42/$ cat oz-3.5.1.dat
BINUTILS_DIR=binutils-2.15
GCC_DIR=gcc-3.4.2
GLIBC_DIR=glibc-2.3.2
LINUX_DIR=linux-2.4.18
GLIBCTHREADS_FILENAME=glibc-linuxthreads-2.3.2
GDB_DIR=gdb-6.4

4.2 Build the toolchain

toolzone:crosstool-0.42/$ time sh oz-3.5.1.sh > OUT.oz-3.5.1 2>&1 &
[1] 4136
real    67m0.915s
user    29m31.539s
sys     15m13.665s

19 June 2006

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