Using gcc7 from the contrib layer
Starting with the warrior branch, meta-tegra includes a contrib layer with user-contributed recipes
for optional inclusion in your builds. The layer includes recipes for gcc7 that you can use for compatibility
with CUDA 10.0.
Follow the steps below to switch to GCC 7:
- Use
bitbake-layers add-layerto add themeta-tegra/contriblayer to your project inbuild/conf/bblayers.conf. - Select GCC version in your
build/conf/local.confand use the required configuration like this:
GCCVERSION = "7.%"
require contrib/conf/include/gcc-compat.conf
Older GCC versions, such as GCC 7, does NOT support fmacro-prefix-map. As a result, due to the default settings, while building newer releases of the Yocto Project, for example Warrior, with older GCC version you may get errors like "cannot compute suffix of object files". To fix add the following lines to your build/conf/local.conf:
# GCC 7 doesn't support fmacro-prefix-map, results in "error: cannot compute suffix of object files: cannot compile"
DEBUG_PREFIX_MAP_remove = "-fmacro-prefix-map=${WORKDIR}=/usr/src/debug/${PN}/${EXTENDPE}${PV}-${PR}"
NOTE: This configuration is applied in contrib/conf/include/gcc-compat.conf. No further actions are required if you have already required it in build/conf/local.conf.