5.2. Developer (Unstable) — RTEMS User Manual 5.4-rc2 (21st August 2026) documentation

# 5.2. Developer (Unstable)

RTEMS provides open access to it’s development processes. We call this the developer set up. The project encourages all users to inspect, review, comment and contribute to the code base. The processes described here are the same processes the core development team use when developing and maintaining RTEMS.

Warning

The development version is not for use in production and it can break from time to time.

Please read Host Computer before continuing. The following procedure assumes you have installed and configured your host operating system. It also assumes you have installed any dependent packages needed when building the tools and the kernel.

You need to select a location to build and install the RTEMS Tool chain and RTEMS. Make sure there is plenty of disk space and a fast disk is recommended. Our procedure will document building and installing the tools in a home directory called `development/rtems`. Using a home directory means you can do this without needing to be root. You can also use `/opt/rtems/build` if you have access to that path.

The location used to install the tools and kernel is called the prefix. It is best to have a prefix for each different version of RTEMS you are using. If you are using RTEMS 4.11 in production it is not a good idea to install a development version of 5 over the top. A separate prefix for each version avoids this.

The RTEMS tool chain changes less often than the RTEMS kernel. One method of working with development releases is to have a separate prefix for the RTEMS tools and a different one for the RTEMS kernel. You can then update each without interacting with the other. You can also have a number of RTEMS versions available to test with.

## 5.2.1. POSIX and OS X Host Tools Chain

This procedure will build a SPARC tool chain.

Clone the RTEMS Source Builder (RSB) repository:

    $ cd
    $ mkdir -p development/rtems
    $ cd development/rtems
    $ git clone git://git.rtems.org/rtems-source-builder.git rsb
    Cloning into 'rsb'...
    remote: Counting objects: 5837, done.
    remote: Compressing objects: 100% (2304/2304), done.
    remote: Total 5837 (delta 4014), reused 5056 (delta 3494)
    Receiving objects: 100% (5837/5837), 2.48 MiB | 292.00 KiB/s, done.
    Resolving deltas: 100% (4014/4014), done.
    Checking connectivity... done.

Check all the host packages you need are present. Current libraries are not checked and this includes checking for the python development libraries GDB requires:

    $ cd rsb
    $ ./source-builder/sb-check
    RTEMS Source Builder - Check, 5 (089327b5dcf9)
    Environment is ok

If you are unsure how to specify the build set for the architecture you wish to build, just ask the tool:

    $ ../source-builder/sb-set-builder --list-bsets   <1>
    RTEMS Source Builder - Set Builder, v4.11.0
    Examining: config
    Examining: ../source-builder/config    <2>
        4.10/rtems-all.bset      <3>
        4.10/rtems-arm.bset      <4>
        4.10/rtems-autotools.bset
        4.10/rtems-avr.bset
        4.10/rtems-bfin.bset
        4.10/rtems-h8300.bset
        4.10/rtems-i386.bset
        4.10/rtems-lm32.bset
        4.10/rtems-m32c.bset
        4.10/rtems-m32r.bset
        4.10/rtems-m68k.bset
        4.10/rtems-mips.bset
        4.10/rtems-nios2.bset
        4.10/rtems-powerpc.bset
        4.10/rtems-sh.bset
        4.10/rtems-sparc.bset
        4.11/rtems-all.bset
        4.11/rtems-arm.bset
        4.11/rtems-autotools.bset
        4.11/rtems-avr.bset
        4.11/rtems-bfin.bset
        4.11/rtems-h8300.bset
        4.11/rtems-i386.bset
        4.11/rtems-lm32.bset
        4.11/rtems-m32c.bset
        4.11/rtems-m32r.bset
        4.11/rtems-m68k.bset
        4.11/rtems-microblaze.bset
        4.11/rtems-mips.bset
        4.11/rtems-moxie.bset
        4.11/rtems-nios2.bset
        4.11/rtems-powerpc.bset
        4.11/rtems-sh.bset
        4.11/rtems-sparc.bset
        4.11/rtems-sparc64.bset
        4.11/rtems-v850.bset
        4.9/rtems-all.bset
        4.9/rtems-arm.bset
        4.9/rtems-autotools.bset
        4.9/rtems-i386.bset
        4.9/rtems-m68k.bset
        4.9/rtems-mips.bset
        4.9/rtems-powerpc.bset
        4.9/rtems-sparc.bset
        gnu-tools-4.6.bset
        rtems-4.10-base.bset    <5>
        rtems-4.11-base.bset
        rtems-4.9-base.bset
        rtems-base.bset         <5>

Items:

1. Only option required is `--list-bsets`

2. The paths inspected. See Configuration.

3. A build set to build all RTEMS 4.10 supported architectures.

4. The build set for the ARM architecture on RTEMS 4.10.

5. Support build set file with common functionality included by other build set files.

Build a tool chain for the SPARC architecture. We are using the SPARC architecture because GDB has a good simulator that lets us run and test the samples RTEMS builds by default. The current development version is 5 and is on master:

    $ cd rtems
    $ ../source-builder/sb-set-builder --prefix=/usr/home/chris/development/rtems/5 5/rtems-sparc
    RTEMS Source Builder - Set Builder, 5 (089327b5dcf9)
    Build Set: 5/rtems-sparc
    Build Set: 5/rtems-autotools.bset
    Build Set: 5/rtems-autotools-internal.bset
    config: tools/rtems-autoconf-2.69-1.cfg
    package: autoconf-2.69-x86_64-linux-gnu-1
    Creating source directory: sources
    download: ftp://ftp.gnu.org/gnu/autoconf/autoconf-2.69.tar.gz -> sources/autoconf-2.69.tar.gz
    downloading: sources/autoconf-2.69.tar.gz - 1.8MB of 1.8MB (100%)
    building: autoconf-2.69-x86_64-linux-gnu-1
    config: tools/rtems-automake-1.12.6-1.cfg
    package: automake-1.12.6-x86_64-linux-gnu-1
    download: ftp://ftp.gnu.org/gnu/automake/automake-1.12.6.tar.gz -> sources/automake-1.12.6.tar.gz
    downloading: sources/automake-1.12.6.tar.gz - 2.0MB of 2.0MB (100%)
    Creating source directory: patches
    download: https://git.rtems.org/rtems-tools/plain/tools/5/automake/automake-1.12.6-bugzilla.redhat.com-1239379.diff -> patches/automake-1.12.6-bugzilla.redhat.com-1239379.diff
    downloading: patches/automake-1.12.6-bugzilla.redhat.com-1239379.diff - 408.0 bytes of 408.0 bytes (100%)
    building: automake-1.12.6-x86_64-linux-gnu-1
    cleaning: autoconf-2.69-x86_64-linux-gnu-1
    cleaning: automake-1.12.6-x86_64-linux-gnu-1
    Build Set: Time 0:00:12.713221
    Build Set: 5/rtems-autotools-base.bset
    config: tools/rtems-autoconf-2.69-1.cfg
    package: autoconf-2.69-x86_64-linux-gnu-1
    building: autoconf-2.69-x86_64-linux-gnu-1
    reporting: tools/rtems-autoconf-2.69-1.cfg -> autoconf-2.69-x86_64-linux-gnu-1.txt
    reporting: tools/rtems-autoconf-2.69-1.cfg -> autoconf-2.69-x86_64-linux-gnu-1.xml
    config: tools/rtems-automake-1.12.6-1.cfg
    package: automake-1.12.6-x86_64-linux-gnu-1
    building: automake-1.12.6-x86_64-linux-gnu-1
    reporting: tools/rtems-automake-1.12.6-1.cfg -> automake-1.12.6-x86_64-linux-gnu-1.txt
    reporting: tools/rtems-automake-1.12.6-1.cfg -> automake-1.12.6-x86_64-linux-gnu-1.xml
    installing: autoconf-2.69-x86_64-linux-gnu-1 -> /usr/home/chris/development/rtems/5
    installing: automake-1.12.6-x86_64-linux-gnu-1 -> /usr/home/chris/development/rtems/5
    cleaning: autoconf-2.69-x86_64-linux-gnu-1
    cleaning: automake-1.12.6-x86_64-linux-gnu-1
    Build Set: Time 0:00:09.105363
    Build Set: Time 0:00:21.822083
    config: devel/expat-2.1.0-1.cfg
    package: expat-2.1.0-x86_64-linux-gnu-1
    download: http://downloads.sourceforge.net/project/expat/expat/2.1.0/expat-2.1.0.tar.gz -> sources/expat-2.1.0.tar.gz
     redirect: https://vorboss.dl.sourceforge.net/project/expat/expat/2.1.0/expat-2.1.0.tar.gz
    downloading: sources/expat-2.1.0.tar.gz - 549.4kB of 549.4kB (100%)
    building: expat-2.1.0-x86_64-linux-gnu-1
    reporting: devel/expat-2.1.0-1.cfg -> expat-2.1.0-x86_64-linux-gnu-1.txt
    reporting: devel/expat-2.1.0-1.cfg -> expat-2.1.0-x86_64-linux-gnu-1.xml
    config: tools/rtems-binutils-2.29-1.cfg
    package: sparc-rtems5-binutils-2.29-x86_64-linux-gnu-1
    download: ftp://ftp.gnu.org/gnu/binutils/binutils-2.29.tar.bz2 -> sources/binutils-2.29.tar.bz2
    downloading: sources/binutils-2.29.tar.bz2 - 27.7MB of 27.7MB (100%)
    download: https://devel.rtems.org/raw-attachment/ticket/3091/0001-Fix-Binutils-2.29-PR21884.patch -> patches/0001-Fix-Binutils-2.29-PR21884.patch
    downloading: patches/0001-Fix-Binutils-2.29-PR21884.patch - 8.8kB of 8.8kB (100%)
    building: sparc-rtems5-binutils-2.29-x86_64-linux-gnu-1
    reporting: tools/rtems-binutils-2.29-1.cfg -> sparc-rtems5-binutils-2.29-x86_64-linux-gnu-1.txt
    reporting: tools/rtems-binutils-2.29-1.cfg -> sparc-rtems5-binutils-2.29-x86_64-linux-gnu-1.xml
    config: tools/rtems-gcc-7.2.0-newlib-2.5.0.20170922-1.cfg
    package: sparc-rtems5-gcc-7.2.0-newlib-2.5.0.20170922-x86_64-linux-gnu-1
    download: https://ftp.gnu.org/gnu/gcc/gcc-7.2.0/gcc-7.2.0.tar.xz -> sources/gcc-7.2.0.tar.xz
    downloading: sources/gcc-7.2.0.tar.xz - 59.4MB of 59.4MB (100%)
    download: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=62ffbcb7502f0ff88ff7566cd6d7c59c0483ecc0 -> patches/gcc-62ffbcb7502f0ff88ff7566cd6d7c59c0483ecc0.patch
    downloading: patches/gcc-62ffbcb7502f0ff88ff7566cd6d7c59c0483ecc0.patch - 1.8kB
    download: https://gcc.gnu.org/git/?p=gcc.git;a=blobdiff_plain;f=gcc/config.gcc;h=593631849bb5e0df5cc4ff42c1a1cc34b7eec2f8;hp=a9196cd26d9ec24c2e3f6026f63348cae3734861;hb=e840389000b8339a63bee56d8b3...<see log> -> patches/gcc-593631849bb5e0df5cc4ff42c1a1cc34b7eec2f8.patch
    downloading: patches/gcc-593631849bb5e0df5cc4ff42c1a1cc34b7eec2f8.patch - 806.0 bytes
    download: https://gcc.gnu.org/git/?p=gcc.git;a=blobdiff_plain;f=gcc/config/rs6000/rtems.h;h=7ea9ebdb77b6a9b7060ad2362318e0e12b9058ae;hp=8a62fdcbaf321d616021c4c396619b7f56cf5ed2;hb=e840389000b8339a...<see log> -> patches/gcc-7ea9ebdb77b6a9b7060ad2362318e0e12b9058ae.patch
    downloading: patches/gcc-7ea9ebdb77b6a9b7060ad2362318e0e12b9058ae.patch - 3.2kB
    download: ftp://sourceware.org/pub/newlib/newlib-2.5.0.20170922.tar.gz -> sources/newlib-2.5.0.20170922.tar.gz
    downloading: sources/newlib-2.5.0.20170922.tar.gz - 17.3MB of 17.3MB (100%)
    download: https://devel.rtems.org/raw-attachment/ticket/2514/0001-RTEMS-Self-contained-POSIX-objects.patch -> patches/0001-RTEMS-Self-contained-POSIX-objects.patch
    downloading: patches/0001-RTEMS-Self-contained-POSIX-objects.patch - 5.7kB of 5.7kB (100%)
    download: https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;a=patch;h=c165a27c0147471977377acd8918ab3b446f947a -> patches/newlib-cygwin-git-c165a27c0147471977377acd8918ab3b446f947a.patch
    downloading: patches/newlib-cygwin-git-c165a27c0147471977377acd8918ab3b446f947a.patch - 986.0 bytes
    download: https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;a=patch;h=ce189d8afef720b0977b5cae7f9eabf5d49b530c -> patches/newlib-cygwin-git-ce189d8afef720b0977b5cae7f9eabf5d49b530c.patch
    downloading: patches/newlib-cygwin-git-ce189d8afef720b0977b5cae7f9eabf5d49b530c.patch - 3.4kB
    download: https://ftp.gnu.org/gnu/mpfr/mpfr-3.1.4.tar.bz2 -> sources/mpfr-3.1.4.tar.bz2
    downloading: sources/mpfr-3.1.4.tar.bz2 - 1.2MB of 1.2MB (100%)
    download: https://ftp.gnu.org/gnu/mpc/mpc-1.0.3.tar.gz -> sources/mpc-1.0.3.tar.gz
    downloading: sources/mpc-1.0.3.tar.gz - 654.2kB of 654.2kB (100%)
    download: https://ftp.gnu.org/gnu/gmp/gmp-6.1.0.tar.bz2 -> sources/gmp-6.1.0.tar.bz2
    downloading: sources/gmp-6.1.0.tar.bz2 - 2.3MB of 2.3MB (100%)
    building: sparc-rtems5-gcc-7.2.0-newlib-2.5.0.20170922-x86_64-linux-gnu-1
    reporting: tools/rtems-gcc-7.2.0-newlib-2.5.0.20170922-1.cfg -> sparc-rtems5-gcc-7.2.0-newlib-2.5.0.20170922-x86_64-linux-gnu-1.txt
    reporting: tools/rtems-gcc-7.2.0-newlib-2.5.0.20170922-1.cfg -> sparc-rtems5-gcc-7.2.0-newlib-2.5.0.20170922-x86_64-linux-gnu-1.xml
    config: tools/rtems-gdb-8.0.1-1.cfg
    package: sparc-rtems5-gdb-8.0.1-x86_64-linux-gnu-1
    download: http://ftp.gnu.org/gnu/gdb/gdb-8.0.1.tar.xz -> sources/gdb-8.0.1.tar.xz
    downloading: sources/gdb-8.0.1.tar.xz - 18.7MB of 18.7MB (100%)
    download: https://gaisler.org/gdb/gdb-8.0.1-sis-leon2-leon3.diff -> patches/gdb-8.0.1-sis-leon2-leon3.diff
    downloading: patches/gdb-8.0.1-sis-leon2-leon3.diff - 224.5kB of 224.5kB (100%)
    building: sparc-rtems5-gdb-8.0.1-x86_64-linux-gnu-1
    reporting: tools/rtems-gdb-8.0.1-1.cfg -> sparc-rtems5-gdb-8.0.1-x86_64-linux-gnu-1.txt
    reporting: tools/rtems-gdb-8.0.1-1.cfg -> sparc-rtems5-gdb-8.0.1-x86_64-linux-gnu-1.xml
    config: tools/rtems-tools-5-1.cfg
    package: rtems-tools-HEAD-1
    Creating source directory: sources/git
    git: clone: git://git.rtems.org/rtems-tools.git -> sources/git/rtems-tools.git
    git: reset: git://git.rtems.org/rtems-tools.git
    git: fetch: git://git.rtems.org/rtems-tools.git -> sources/git/rtems-tools.git
    git: checkout: git://git.rtems.org/rtems-tools.git => HEAD
    git: pull: git://git.rtems.org/rtems-tools.git
    building: rtems-tools-HEAD-1
    reporting: tools/rtems-tools-5-1.cfg -> rtems-tools-HEAD-1.txt
    reporting: tools/rtems-tools-5-1.cfg -> rtems-tools-HEAD-1.xml
    config: tools/rtems-kernel-5.cfg
    package: sparc-rtems5-kernel-5-1
    building: sparc-rtems5-kernel-5-1
    reporting: tools/rtems-kernel-5.cfg -> sparc-rtems5-kernel-5-1.txt
    reporting: tools/rtems-kernel-5.cfg -> sparc-rtems5-kernel-5-1.xml
    installing: expat-2.1.0-x86_64-linux-gnu-1 -> /usr/home/chris/development/rtems/5
    installing: sparc-rtems5-binutils-2.29-x86_64-linux-gnu-1 -> /usr/home/chris/development/rtems/5
    installing: sparc-rtems5-gcc-7.2.0-newlib-2.5.0.20170922-x86_64-linux-gnu-1 -> /usr/home/chris/development/rtems/5
    installing: sparc-rtems5-gdb-8.0.1-x86_64-linux-gnu-1 -> /usr/home/chris/development/rtems/5
    installing: rtems-tools-HEAD-1 -> /usr/home/chris/development/rtems/5
    installing: sparc-rtems5-kernel-5-1 -> /usr/home/chris/development/rtems/5
    cleaning: expat-2.1.0-x86_64-linux-gnu-1
    cleaning: sparc-rtems5-binutils-2.29-x86_64-linux-gnu-1
    cleaning: sparc-rtems5-gcc-7.2.0-newlib-2.5.0.20170922-x86_64-linux-gnu-1
    cleaning: sparc-rtems5-gdb-8.0.1-x86_64-linux-gnu-1
    cleaning: rtems-tools-HEAD-1
    cleaning: sparc-rtems5-kernel-5-1
    Build Set: Time 0:39:33.988995

## 5.2.2. Windows Host Tool Chain

This section details how you create an RTEMS development environment on Windows. The installation documented here is on Windows 7 64bit Professional. Building on Windows 10 has been reported as working.

Please see Microsoft Windows before continuing.

Note

If the RSB reports `error: no hosts defaults found; please add` you have probably opened an MSYS2 32bit Shell. Close all 32bit Shell windows and open the MSYS2 64bit Shell.

### 5.2.2.1. RTEMS Windows Tools

Create a workspace for RTEMS using the following shell command:

     ~
    $ mkdir -p /c/opt/rtems

The `/c` path is an internal MSYS2 mount point of the `C:` drive. The command creates the RTEMS work space on the `C:` drive. If you wish to use another drive please subsitute `/c` with your drive letter.

We build and install all RTEMS packages under the prefix we just created. Change to that directory and get a copy of the RSB:

     ~
    $ cd /c/opt/rtems
     /c/opt/rtems
    $ git clone git://git.rtems.org/rtems-source-builder.git rsb
    Cloning into 'rsb'...
    remote: Counting objects: 5716, done.
    remote: Compressing objects: 100% (2183/2183), done.
    remote: Total 5716 (delta 3919), reused 5071 (delta 3494)
    Receiving objects: 100% (5716/5716), 2.46 MiB | 656.00 KiB/s, done.
    Resolving deltas: 100% (3919/3919), done.
    Checking connectivity... done.
    Checking out files: 100% (630/630), done.
     /c/opt/rtems
    $ cd rsb

We are building RTEMS 4.11 tools so select the 4.11 branch:

     /c/opt/rtems/rsb
    $ git checkout 4.11
    Branch 4.11 set up to track remote branch 4.11 from origin.
    Switched to a new branch '4.11'
     /c/opt/rtems/rsb
    $

Check the RSB has a valid environment:

     /c/opt/rtems/rsb
    $ cd rtems
     /c/opt/rtems/rsb/rtems
    $ ../source-builder/sb-check
    RTEMS Source Builder - Check, 4.11 (01ac76f2f90f)
    Environment is ok
     /c/opt/rtems/rsb/rtems
    $

To build a set of RTEMS tools for the Intel `i386` architecture. The build runs a single job rather than a job per CPU in your machine and will take a long time so please be patient. The RSB creates a log file containing all the build output and it will be changing size. The RSB command to build `i386` tools is:

     /c/opt/rtems/rsb/rtems
    $ ../source-builder/sb-set-builder --prefix=/c/opt/rtems/4.11 \
                                       --jobs=none 4.11/rtems-i386
    RTEMS Source Builder - Set Builder, 4.11 (01ac76f2f90f)
    Build Set: 4.11/rtems-i386
    Build Set: 4.11/rtems-autotools.bset
    Build Set: 4.11/rtems-autotools-internal.bset
    config: tools/rtems-autoconf-2.69-1.cfg
    package: autoconf-2.69-x86_64-w64-mingw32-1
    Creating source directory: sources
    download: ftp://ftp.gnu.org/gnu/autoconf/autoconf-2.69.tar.gz -> sources/autoconf-2.69.tar.gz
    downloading: sources/autoconf-2.69.tar.gz - 1.8MB of 1.8MB (100%)
     building: autoconf-2.69-x86_64-w64-mingw32-1
    config: tools/rtems-automake-1.12.6-1.cfg
    package: automake-1.12.6-x86_64-w64-mingw32-1
    download: ftp://ftp.gnu.org/gnu/automake/automake-1.12.6.tar.gz -> sources/automake-1.12.6.tar.gz
    downloading: sources/automake-1.12.6.tar.gz - 2.0MB of 2.0MB (100%)
     building: automake-1.12.6-x86_64-w64-mingw32-1
    cleaning: autoconf-2.69-x86_64-w64-mingw32-1
    cleaning: automake-1.12.6-x86_64-w64-mingw32-1
    Build Set: Time 0:00:42.515625
    Build Set: 4.11/rtems-autotools-base.bset
    config: tools/rtems-autoconf-2.69-1.cfg
    package: autoconf-2.69-x86_64-w64-mingw32-1
    building: autoconf-2.69-x86_64-w64-mingw32-1
    reporting: tools/rtems-autoconf-2.69-1.cfg -> autoconf-2.69-x86_64-w64-mingw32-1.txt
    reporting: tools/rtems-autoconf-2.69-1.cfg -> autoconf-2.69-x86_64-w64-mingw32-1.xml
    config: tools/rtems-automake-1.12.6-1.cfg
    package: automake-1.12.6-x86_64-w64-mingw32-1
    building: automake-1.12.6-x86_64-w64-mingw32-1
    reporting: tools/rtems-automake-1.12.6-1.cfg -> automake-1.12.6-x86_64-w64-mingw32-1.txt
    reporting: tools/rtems-automake-1.12.6-1.cfg -> automake-1.12.6-x86_64-w64-mingw32-1.xml
    tarball: tar/rtems-4.11-autotools-x86_64-w64-mingw32-1.tar.bz2
    installing: autoconf-2.69-x86_64-w64-mingw32-1 -> C:\opt\rtems\4.11
    installing: automake-1.12.6-x86_64-w64-mingw32-1 -> C:\opt\rtems\4.11
    cleaning: autoconf-2.69-x86_64-w64-mingw32-1
    cleaning: automake-1.12.6-x86_64-w64-mingw32-1
    Build Set: Time 0:00:37.718750
    Build Set: Time 0:01:20.234375
    config: devel/expat-2.1.0-1.cfg
    package: expat-2.1.0-x86_64-w64-mingw32-1
    download: http://downloads.sourceforge.net/project/expat/expat/2.1.0/expat-2.1.0.tar.gz -> sources/expat-2.1.0.tar.gz
     redirect: http://iweb.dl.sourceforge.net/project/expat/expat/2.1.0/expat-2.1.0.tar.gz
    downloading: sources/expat-2.1.0.tar.gz - 549.4kB of 549.4kB (100%)
    building: expat-2.1.0-x86_64-w64-mingw32-1
    reporting: devel/expat-2.1.0-1.cfg -> expat-2.1.0-x86_64-w64-mingw32-1.txt
    reporting: devel/expat-2.1.0-1.cfg -> expat-2.1.0-x86_64-w64-mingw32-1.xml
    config: tools/rtems-binutils-2.24-1.cfg
    package: i386-rtems4.11-binutils-2.24-x86_64-w64-mingw32-1
    download: ftp://ftp.gnu.org/gnu/binutils/binutils-2.24.tar.bz2 -> sources/binutils-2.24.tar.bz2
    downloading: sources/binutils-2.24.tar.bz2 - 21.7MB of 21.7MB (100%)
    building: i386-rtems4.11-binutils-2.24-x86_64-w64-mingw32-1
    reporting: tools/rtems-binutils-2.24-1.cfg -> i386-rtems4.11-binutils-2.24-x86_64-w64-mingw32-1.txt
    reporting: tools/rtems-binutils-2.24-1.cfg -> i386-rtems4.11-binutils-2.24-x86_64-w64-mingw32-1.xml
    config: tools/rtems-gcc-4.9.3-newlib-2.2.0-20150423-1.cfg
    package: i386-rtems4.11-gcc-4.9.3-newlib-2.2.0.20150423-x86_64-w64-mingw32-1
    download: ftp://ftp.gnu.org/gnu/gcc/gcc-4.9.3/gcc-4.9.3.tar.bz2 -> sources/gcc-4.9.3.tar.bz2
    downloading: sources/gcc-4.9.3.tar.bz2 - 85.8MB of 85.8MB (100%)
    download: ftp://sourceware.org/pub/newlib/newlib-2.2.0.20150423.tar.gz -> sources/newlib-2.2.0.20150423.tar.gz
    downloading: sources/newlib-2.2.0.20150423.tar.gz - 16.7MB of 16.7MB (100%)
    download: http://www.mpfr.org/mpfr-3.0.1/mpfr-3.0.1.tar.bz2 -> sources/mpfr-3.0.1.tar.bz2
    downloading: sources/mpfr-3.0.1.tar.bz2 - 1.1MB of 1.1MB (100%)
    download: http://www.multiprecision.org/mpc/download/mpc-0.8.2.tar.gz -> sources/mpc-0.8.2.tar.gz
    downloading: sources/mpc-0.8.2.tar.gz - 535.5kB of 535.5kB (100%)
    download: ftp://ftp.gnu.org/gnu/gmp/gmp-5.0.5.tar.bz2 -> sources/gmp-5.0.5.tar.bz2
    downloading: sources/gmp-5.0.5.tar.bz2 - 2.0MB of 2.0MB (100%)
    building: i386-rtems4.11-gcc-4.9.3-newlib-2.2.0.20150423-x86_64-w64-mingw32-1
    reporting: tools/rtems-gcc-4.9.3-newlib-2.2.0-20150423-1.cfg ->
    i386-rtems4.11-gcc-4.9.3-newlib-2.2.0.20150423-x86_64-w64-mingw32-1.txt
    reporting: tools/rtems-gcc-4.9.3-newlib-2.2.0-20150423-1.cfg ->
    i386-rtems4.11-gcc-4.9.3-newlib-2.2.0.20150423-x86_64-w64-mingw32-1.xml
    config: tools/rtems-gdb-7.9-1.cfg
    package: i386-rtems4.11-gdb-7.9-x86_64-w64-mingw32-1
    download: http://ftp.gnu.org/gnu/gdb/gdb-7.9.tar.xz -> sources/gdb-7.9.tar.xz
    downloading: sources/gdb-7.9.tar.xz - 17.0MB of 17.0MB (100%)
    download: https://git.rtems.org/rtems-tools/plain/tools/4.11/gdb/gdb-sim-arange-inline.diff -> patches/gdb-sim-arange-inline.diff
    downloading: patches/gdb-sim-arange-inline.diff - 761.0 bytes of 761.0 bytes (100%)
    download: https://git.rtems.org/rtems-tools/plain/tools/4.11/gdb/gdb-sim-cgen-inline.diff -> patches/gdb-sim-cgen-inline.diff
    downloading: patches/gdb-sim-cgen-inline.diff - 706.0 bytes of 706.0 bytes (100%)
    building: i386-rtems4.11-gdb-7.9-x86_64-w64-mingw32-1
    reporting: tools/rtems-gdb-7.9-1.cfg ->
    i386-rtems4.11-gdb-7.9-x86_64-w64-mingw32-1.txt
    reporting: tools/rtems-gdb-7.9-1.cfg ->
    i386-rtems4.11-gdb-7.9-x86_64-w64-mingw32-1.xml
    config: tools/rtems-tools-4.11-1.cfg
    package: rtems-tools-4.11-1
    Creating source directory: sources/git
    git: clone: git://git.rtems.org/rtems-tools.git -> sources/git/rtems-tools.git
    git: reset: git://git.rtems.org/rtems-tools.git
    git: fetch: git://git.rtems.org/rtems-tools.git -> sources/git/rtems-tools.git
    git: checkout: git://git.rtems.org/rtems-tools.git => 4.11
    git: pull: git://git.rtems.org/rtems-tools.git
    building: rtems-tools-4.11-1
    reporting: tools/rtems-tools-4.11-1.cfg -> rtems-tools-4.11-1.txt
    reporting: tools/rtems-tools-4.11-1.cfg -> rtems-tools-4.11-1.xml
    config: tools/rtems-kernel-4.11.cfg
    installing: expat-2.1.0-x86_64-w64-mingw32-1 -> C:\opt\rtems\4.11
    installing: i386-rtems4.11-binutils-2.24-x86_64-w64-mingw32-1 -> C:\opt\rtems\4.11
    installing: i386-rtems4.11-gcc-4.9.3-newlib-2.2.0.20150423-x86_64-w64-mingw32-1 -> C:\opt\rtems\4.11
    installing: i386-rtems4.11-gdb-7.9-x86_64-w64-mingw32-1 -> C:\opt\rtems\4.11
    installing: rtems-tools-4.11-1 -> C:\opt\rtems\4.11
    cleaning: expat-2.1.0-x86_64-w64-mingw32-1
    cleaning: i386-rtems4.11-binutils-2.24-x86_64-w64-mingw32-1
    cleaning: i386-rtems4.11-gcc-4.9.3-newlib-2.2.0.20150423-x86_64-w64-mingw32-1
    cleaning: i386-rtems4.11-gdb-7.9-x86_64-w64-mingw32-1
    cleaning: rtems-tools-4.11-1
    Build Set: Time 1:32:58.972919
     /c/opt/rtems/rsb/rtems
    $

### 5.2.2.2. Building the Kernel

We can now build the RTEMS kernel using the RTEMS tools we have just built. First we need to set the path to the tools:

     /c
    $ cd /c/opt/rtems
     /c/opt/rtems
    $ export PATH=/c/opt/rtems/4.11/bin:$PATH
     /c/opt/rtems
    $

We currently build RTEMS from the git release branch for 4.11:

     /c/opt/rtems
    $ mkdir kernel
     /c/opt/rtems
    $ cd kernel
     /c/opt/rtems/kernel
    $ git clone git://git.rtems.org/rtems.git rtems
    Cloning into 'rtems'...
    remote: Counting objects: 482766, done.
    remote: Compressing objects: 100% (88781/88781), done.
    remote: Total 482766 (delta 389610), reused 475155 (delta 383437)
    Receiving objects: 100% (482766/482766), 69.77 MiB | 697.00 KiB/s, done.
    Resolving deltas: 100% (389610/389610), done.
    Checking connectivity... done.
    Checking out files: 100% (10626/10626), done.
     /c/opt/rtems/kernel
    $ cd rtems
     /c/opt/rtems/kernel/rtems
    $ git checkout 4.11
    Checking out files: 100% (2553/2553), done.
    Branch 4.11 set up to track remote branch 4.11 from origin.
    Switched to a new branch '4.11'
     /c/opt/rtems/kernel
    $

The kernel code cloned from git needs to be bootstrapped. Bootstrapping creates `autoconf` and `automake` generated files. To bootstrap we first clean away any files, then generate the pre-install header file lists and finally we generate the `autoconf` and `automake` files using the RSB’s bootstrap tool. First we clean any generated files that exist:

     /c/opt/rtems/kernel/rtems
    $ ./bootstrap -c
    removing automake generated Makefile.in files
    removing configure files
    removing aclocal.m4 files

Then we generate the pre-install header file automake make files:

     /c/opt/rtems/kernel/rtems
    $ ./bootstrap -p
    Generating ./c/src/ada/preinstall.am
    Generating ./c/src/lib/libbsp/arm/altera-cyclone-v/preinstall.am
    Generating ./c/src/lib/libbsp/arm/atsam/preinstall.am
    Generating ./c/src/lib/libbsp/arm/beagle/preinstall.am
    Generating ./c/src/lib/libbsp/arm/csb336/preinstall.am
    Generating ./c/src/lib/libbsp/arm/csb337/preinstall.am
    Generating ./c/src/lib/libbsp/arm/edb7312/preinstall.am
      .......
    Generating ./cpukit/score/cpu/mips/preinstall.am
    Generating ./cpukit/score/cpu/moxie/preinstall.am
    Generating ./cpukit/score/cpu/nios2/preinstall.am
    Generating ./cpukit/score/cpu/no_cpu/preinstall.am
    Generating ./cpukit/score/cpu/or1k/preinstall.am
    Generating ./cpukit/score/cpu/powerpc/preinstall.am
    Generating ./cpukit/score/cpu/sh/preinstall.am
    Generating ./cpukit/score/cpu/sparc/preinstall.am
    Generating ./cpukit/score/cpu/sparc64/preinstall.am
    Generating ./cpukit/score/cpu/v850/preinstall.am
    Generating ./cpukit/score/preinstall.am
    Generating ./cpukit/telnetd/preinstall.am
    Generating ./cpukit/wrapup/preinstall.am
    Generating ./cpukit/zlib/preinstall.am
     /c/opt/rtems/kernel/rtems

Finally we run the RSB’s parallel `bootstrap` command:

    $ /c/opt/rtems/rsb/source-builder/sb-bootstrap
    RTEMS Source Builder - RTEMS Bootstrap, 4.11 (76188ee494dd)
      1/139: autoreconf: configure.ac
      2/139: autoreconf: c/configure.ac
      3/139: autoreconf: c/src/configure.ac
      4/139: autoreconf: c/src/ada-tests/configure.ac
      5/139: autoreconf: c/src/lib/libbsp/arm/configure.ac
      6/139: autoreconf: c/src/lib/libbsp/arm/altera-cyclone-v/configure.ac
      7/139: autoreconf: c/src/lib/libbsp/arm/atsam/configure.ac
      8/139: autoreconf: c/src/lib/libbsp/arm/beagle/configure.ac
      9/139: autoreconf: c/src/lib/libbsp/arm/csb336/configure.ac
     10/139: autoreconf: c/src/lib/libbsp/arm/csb337/configure.ac
     11/139: autoreconf: c/src/lib/libbsp/arm/edb7312/configure.ac
      .......
    129/139: autoreconf: testsuites/samples/configure.ac
    130/139: autoreconf: testsuites/smptests/configure.ac
    131/139: autoreconf: testsuites/sptests/configure.ac
    132/139: autoreconf: testsuites/tmtests/configure.ac
    133/139: autoreconf: testsuites/tools/configure.ac
    134/139: autoreconf: testsuites/tools/generic/configure.ac
    135/139: autoreconf: tools/build/configure.ac
    136/139: autoreconf: tools/cpu/configure.ac
    137/139: autoreconf: tools/cpu/generic/configure.ac
    138/139: autoreconf: tools/cpu/nios2/configure.ac
    139/139: autoreconf: tools/cpu/sh/configure.ac
    Bootstrap time: 0:20:38.759766
     /c/opt/rtems/kernel/rtems
    $

We will build the RTEMS kernel for the `i386` target and the `pc686` BSP. You can check the available BSPs by running the `rtems-bsps` command found in the top directory of the RTEMS kernel source. We build the Board Support Package (BSP) outside the kernel source tree:

     /c/opt/rtems/kernel/rtems
    $ cd ..
     /c/opt/rtems/kernel
    $ mkdir pc686
     /c/opt/rtems/kernel
    $ cd pc686
     /c/opt/rtems/kernel/pc686
    $

Configure the RTEMS kernel to build `pc686` BSP for the `i386` target with networking disabled, We will build the external libBSD stack later:

     /c/opt/rtems/kernel/pc686
    $ /c/opt/rtems/kernel/rtems/configure --prefix=/c/opt/rtems/4.11 \
           --target=i386-rtems4.11 --disable-networking --enable-rtemsbsp=pc686
    checking for gmake... no
    checking for make... make
    checking for RTEMS Version... 4.11.99.0
    checking build system type... x86_64-pc-mingw64
    checking host system type... x86_64-pc-mingw64
    checking target system type... i386-pc-rtems4.11
    checking for a BSD-compatible install... /usr/bin/install -c
    checking whether build environment is sane... yes
    checking for a thread-safe mkdir -p... /usr/bin/mkdir -p
    checking for gawk... gawk
    checking whether make sets $(MAKE)... yes
    checking whether to enable maintainer-specific portions of Makefiles... no
    checking that generated files are newer than configure... done
    configure: creating ./config.status
    configure: configuring in ./tools/build
      .......
    checking whether make sets $(MAKE)... yes
    checking whether to enable maintainer-specific portions of Makefiles... no
    checking that generated files are newer than configure... done
    configure: creating ./config.status
    config.status: creating Makefile

    target architecture: i386.
    available BSPs: pc686.
    'make all' will build the following BSPs: pc686.
    other BSPs can be built with 'make RTEMS_BSP="bsp1 bsp2 ..."'

    config.status: creating Makefile
     /c/opt/rtems/kernel/pc686
    $

Build the kernel:

     /c/opt/rtems/kernel/pc686
    $ make
    Making all in tools/build
    make[1]: Entering directory '/c/opt/rtems/kernel/pc686/tools/build'
    make  all-am
    make[2]: Entering directory '/c/opt/rtems/kernel/pc686/tools/build'
    gcc -DHAVE_CONFIG_H -I. -I/c/opt/rtems/kernel/rtems/tools/build     -g -O2 -MT
    cklength.o -MD -MP -MF .deps/cklength.Tpo -c -o cklength.o
    /c/opt/rtems/kernel/rtems/tools/build/cklength.c
    gcc -DHAVE_CONFIG_H -I. -I/c/opt/rtems/kernel/rtems/tools/build     -g -O2 -MT
    eolstrip.o -MD -MP -MF .deps/eolstrip.Tpo -c -o eolstrip.o
    /c/opt/rtems/kernel/rtems/tools/build/eolstrip.c
      ..........
    i386-rtems4.11-objcopy -O binary nsecs.nxe nsecs.bin
    ../../../../../pc686/build-tools/bin2boot -v nsecs.ralf 0x00097E00
    ../../../../../pc686/lib/start16.bin 0x00097C00 0 nsecs.bin 0x00100000 0
    header address       0x00097e00, its memory size 0xzx
    first  image address 0x00097c00, its memory size 0x00000200
    second image address 0x00100000, its memory size 0x0003d800
    rm -f nsecs.nxe
    make[6]: Leaving directory '/c/opt/rtems/kernel/pc686/i386-rtems4.11/c/pc686/testsuites/samples/nsecs'
    make[5]: Leaving directory '/c/opt/rtems/kernel/pc686/i386-rtems4.11/c/pc686/testsuites/samples'
    make[4]: Leaving directory '/c/opt/rtems/kernel/pc686/i386-rtems4.11/c/pc686/testsuites/samples'
    make[4]: Entering directory '/c/opt/rtems/kernel/pc686/i386-rtems4.11/c/pc686/testsuites'
    make[4]: Nothing to be done for 'all-am'.
    make[4]: Leaving directory '/c/opt/rtems/kernel/pc686/i386-rtems4.11/c/pc686/testsuites'
    make[3]: Leaving directory '/c/opt/rtems/kernel/pc686/i386-rtems4.11/c/pc686/testsuites'
    make[2]: Leaving directory '/c/opt/rtems/kernel/pc686/i386-rtems4.11/c/pc686'
    make[1]: Leaving directory '/c/opt/rtems/kernel/pc686/i386-rtems4.11/c'
    make[1]: Entering directory '/c/opt/rtems/kernel/pc686'
    make[1]: Nothing to be done for 'all-am'.
    make[1]: Leaving directory '/c/opt/rtems/kernel/pc686'
     /c/opt/rtems/kernel/pc696
    $

Install the kernel to our prefix:

    $ make install
    Making install in tools/build
    make[1]: Entering directory '/c/opt/rtems/kernel/pc686/tools/build'
    make[2]: Entering directory '/c/opt/rtems/kernel/pc686/tools/build'
     /usr/bin/mkdir -p '/c/opt/rtems/4.11/bin'
      /usr/bin/install -c cklength.exe eolstrip.exe packhex.exe unhex.exe
      rtems-bin2c.exe '/c/opt/rtems/4.11/bin'
     /usr/bin/mkdir -p '/c/opt/rtems/4.11/bin'
     /usr/bin/install -c install-if-change '/c/opt/rtems/4.11/bin'
    make[2]: Nothing to be done for 'install-data-am'.
    make[2]: Leaving directory '/c/opt/rtems/kernel/pc686/tools/build'
    make[1]: Leaving directory '/c/opt/rtems/kernel/pc686/tools/build'
    Making install in tools/cpu
    make[1]: Entering directory '/c/opt/rtems/kernel/pc686/tools/cpu'
    Making install in generic
    make[2]: Entering directory '/c/opt/rtems/kernel/pc686/tools/cpu/generic'
    make[3]: Entering directory '/c/opt/rtems/kernel/pc686/tools/cpu/generic'
    make[3]: Nothing to be done for 'install-exec-am'.
    make[3]: Nothing to be done for 'install-data-am'.
    make[3]: Leaving directory '/c/opt/rtems/kernel/pc686/tools/cpu/generic'
    make[2]: Leaving directory '/c/opt/rtems/kernel/pc686/tools/cpu/generic'
    make[2]: Entering directory '/c/opt/rtems/kernel/pc686/tools/cpu'
    make[3]: Entering directory '/c/opt/rtems/kernel/pc686/tools/cpu'
    make[3]: Nothing to be done for 'install-exec-am'.
    make[3]: Nothing to be done for 'install-data-am'.
      ..........
    make[2]: Entering directory '/c/opt/rtems/kernel/pc686'
    make[2]: Nothing to be done for 'install-exec-am'.
     /usr/bin/mkdir -p '/c/opt/rtems/4.11/make'
     /usr/bin/install -c -m 644 /c/opt/rtems/kernel/rtems/make/main.cfg
     /c/opt/rtems/kernel/rtems/make/leaf.cfg '/c/opt/rtems/4.11/make'
     /usr/bin/mkdir -p '/c/opt/rtems/4.11/share/rtems4.11/make/Templates'
     /usr/bin/install -c -m 644
     /c/opt/rtems/kernel/rtems/make/Templates/Makefile.dir
     /c/opt/rtems/kernel/rtems/make/Templates/Makefile.leaf
     /c/opt/rtems/kernel/rtems/make/Templates/Makefile.lib
     '/c/opt/rtems/4.11/share/rtems4.11/make/Templates'
     /usr/bin/mkdir -p '/c/opt/rtems/4.11/make/custom'
     /usr/bin/install -c -m 644 /c/opt/rtems/kernel/rtems/make/custom/default.cfg
     '/c/opt/rtems/4.11/make/custom'
    make[2]: Leaving directory '/c/opt/rtems/kernel/pc686'
    make[1]: Leaving directory '/c/opt/rtems/kernel/pc686'
     /c/opt/rtems/kernel/pc686
    $