The OpenRISC architecture supports multicore implementations. The or1k-elf toolchain is a toolchain that can execute code on multiple cores in a symmetric fashion.

If you build the toolchain manually, you should use a different prefix, such as /opt/toolchains/or1k-elf-multicore and you need to build newlib with the environment variable CFLAGS="-D__OR1K_MULTICORE__":

../newlib/configure --target=or1k-elf \
	--prefix=$PREFIX \
	CFLAGS_FOR_TARGET="-D__OR1K_MULTICORE__"

Pre-Compiled Toolchain

You can install pre-compiled toolchains and install them on your Linux system. We have prebuilt-toolchains for releases of the different components that are preferably installed to /opt/toolchains/or1k-elf-multicore or /opt/toolchains/or1k-elf. You can find some older multicore releases here. The last ones being:</p>

• GCC 4.9.2, Binutils 2.26, Newlib 2.3.0 (+or1k backports), GDB 7.11
• GCC 5.2.0, Binutils 2.26, Newlib 2.3.0 (+or1k backports), GDB 7.11

After downloading a release you can extract it anywhere in your filesystem, preferable to /opt/toolchains/or1k-elf/. You need to add the toolchain to your path:

export PATH=/opt/toolchains/or1k-elf/bin:${PATH}