Download the Coverity Scan Self-buld and install it. You will need to configure ARM-NON-EABI- Compiler for it to use:
Configure
cov-configure --comptype gcc --compiler /opt/devkitpro/devkitARM/bin/arm-none-eabi-gcc
Run it (I'm running on Ubuntu)
cov-build --dir cov-int make all
Make a tarball
tar czvf proxmark3.tgz cov-int
Upload it to scan.coverity.com