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lib/cbprintf: CONFIG_CBPRINTF_LIBC_SUBSTS should be optional

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When aiming for the smallest build result, it is desirable to
use CONFIG_CBPRINTF_NANO together with CONFIG_MINIMAL_LIBC. However
that doesn't mean we need all the functions enabled by having
CONFIG_CBPRINTF_LIBC_SUBSTS=y which increases the binary size even if
those functions are not used and not linked in.

When CONFIG_CBPRINTF_LIBC_SUBSTS=n such functions are not defined
anyway so z_cbvprintf_impl() won't be invoked with missing
functionalities.

Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
This commit is contained in:
Nicolas Pitre 2023-08-03 12:18:05 -04:00 committed by Carles Cufí
parent 35e3bfcdef
commit 4755ebee6a
1 changed files with 1 additions and 1 deletions
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2
lib/os/Kconfig.cbprintf
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@ -16,7 +16,7 @@ config CBPRINTF_COMPLETE
config CBPRINTF_NANO
bool "Space-optimized but feature-limited"
# nano needs to count characters if it's the formatter for libc
select CBPRINTF_LIBC_SUBSTS if MINIMAL_LIBC
imply CBPRINTF_LIBC_SUBSTS if MINIMAL_LIBC
help
If selected a completely different implementation of the core
formatting capability is substituted. This has a much smaller code