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OpenRISC Stable GNU Tool Chain Repository
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=========================================
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This directory is where you will find the source trees for the stable versions
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of the standard GNU tool chain past and present. The newlib library is
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included, since that is required for GCC testing.
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Note that the Linux tool chain requires uClibc and Linux, which should be
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downloaded using git.
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Development source trees are found in the gdb-dev directory.
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The structure mirrors that of the Free Software Foundation tool releases.
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The scripts use a unified directory which allows the entire newlib tool chain
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to be built in a single pass. The script "bld-all.sh" will build a unified
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source tree in the a directory (default name "unisrc") and then configure,
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build, check and install all the tools for both newlib and uClibc tool chains
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using separate build directories (defaults "bd-elf", "bd-elf-gdb", "bd-linux"
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and "bd-linux-gdb"). The default install directory is "/opt/or32-elf-new".
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Use "./bld-all.sh --help" to check the options available, which includes
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options to change all the default directories, omit building newlib and to
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control whichphases of the build process (linking, configuring, building,
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checking and 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-all.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-all.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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1 March 2012
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