MIPS CoreMark score certifications from EEMBC were achieved using CoreMark executables built by a gcc compiler version 4.9.x or higher. Mentor Sourcery CodeBench Lite toolchain was used in the certification process along with a gcc plug-in that added an optimization pass.
You can also use the MIPS supported Codescape toolchain to achieve similar results without the need of a gcc plug-in. To do this, simply go to http://codescape.mips.com/components/toolchain/2017.10-05/downloads.html and download/install a package that is suitable for the target ISA and host machine.
For more information on how we build the CoreMark benchmark, please refer to the CoreMark page at http://www.eembc.org/coremark. Once there, look for MIPS certified CoreMark scores. Each score comes with a full disclosure of information about the score submission such as the set of flags used in the compilation and other relevant information.
Note that “-fplugin=” is not needed when using Codescape toolchain.