It seems, that there are currently some unhandled corner cases in which
`.toolchain_build_ver` results in empty file and thus forcing rebuilds,
even if the toolchain was build correctly just a few moments ago. Until
proper fix is found, workaround that by checking for this corner case
and simply populate `.toolchain_build_ver` file.
While at it, improve the UX and display version mismatch, so it's more
clear what has forced the rebuild:
"Toolchain build version changed (11.2.0-1 != ), running make targetclean"
References: https://gitlab.com/ynezz/openwrt/-/jobs/2133332533/raw
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Fixes following complaints and suggestions:
In scripts/check-toolchain-clean.sh line 2:
eval `grep CONFIG_GCC_VERSION .config`
^-- SC2046 (warning): Quote this to prevent word splitting.
^-- SC2006 (style): Use $(...) notation instead of legacy backticks `...`.
Signed-off-by: Petr Štetiar <ynezz@true.cz>
This can be used to ensure that the compiled code is up to date, when
something important changes in the toolchain.
A recent example of this is the gcc 11 fix for a code miscompilation issue
Signed-off-by: Felix Fietkau <nbd@nbd.name>
