Makefile: Refine -s handling in the make parameters
When looking for the silent flag 's' in MAKEFLAGS we accidentally catch
variable definitions like "ARCH=mips" or "CROSS_COMPILE=/cross/...",
causing several test builds to be silent.
MAKEFLAGS contains the single-letter make flags (without the dash),
followed by flags that don't have a single-letter equivalent such as
"--warn-undefined-variables" (with the dashes), followed by "--" and
command-line variables. For example `make ARCH=mips -k' results in
MAKEFLAGS "k -- ARCH=mips". Running $(filter-out --%) on this does not
discard ARCH=mips, only "--". However adding $(firstword) ensures that
we run the filter either on the single-letter flags or on something
beginning with "--", and avoids silent builds.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20230606143733.994679-2-jean-philippe@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
1 file changed
