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                  OpenRISC Unified GNU Tool Chain Repository
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                  ==========================================
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This directory is where you will find all the source trees for the standard
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GNU tool chain. The newlib library is included, since that is required for GCC
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testing.
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The structure mirrors that of the main Free Software Foundation repository.
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Using a unified directory means that the entire tool chain can be built in a
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single pass. The script "bld.sh" will build a unified source tree in the a
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directory (default name "srcw") and then configure, build, check and install
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all the tools using a separate build directory (default "bld-or32"). The
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default install directory is "/opt/or32-elf-new").
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Use "./bld.sh --help" to check the options available, which includes options
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to change all the default directories, omit building newlib and to control
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whichphases of the build process (linking, configuring, building, checking and
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installing) are run.
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By default the tests (which require DejaGnu to be installed) are *not* run.
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Note in particular that the script requires a version of Or1ksim built from
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SVN (not Or1ksim 0.4.0 release) and that the --or1ksim parameter should be
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used to point to the directory where or1ksim is installed (default
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/opt/or1ksim-new).
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The current version builds GDB separately, because it is not compatible with
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the libraries in binutils used in the unified build.
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Apple OS X notes:
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  * Install required libraries with MacPorts:
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Some GNU libraries that are not supplied as standard with Apple's OS X must be
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installed. They could be built and installed independently but the author found
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the  MacPorts package management system a simple and easy way to install them.
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First the MacPorts app must be installed. To install MacPorts follow the
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instructions on the  project's page here:  http://www.macports.org
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Once MacPorts is installed install the packages "gmp", "mpfr", and "dejagnu"
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with the command:
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$ sudo port install gmp mpfr dejagnu
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  * Build environment variables:
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Once the require libraries are installed, their location must be passed to the
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compiler. The CPPFLAGS, CFLAGS and LFLAGS environment variables are used for
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this. The standard place MacPorts places its installed libraries is /opt/local
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so if this default location was used export the following flags before running
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the bld.sh script:
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$ export CPPFLAGS="-I/opt/local/include"
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$ export CFLAGS="-L/opt/local/lib"
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$ export LDFLAGS="-L/opt/local/lib"
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The bld.sh script should then be OK to run as described above.
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Any questions should be posted on the OpenRISC forum at
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opencores.org/forum,OpenRISC, or discussed on IRC at freenode.net, channel
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#opencores.
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Jeremy Bennett
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20 August 2010

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