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kernel: introduce KERNEL_WERROR config option

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In commit b2d1eb717b65 ("generic: 5.15: enable Werror by default for
kernel compile") CONFIG_WERROR=y was enabled and all warnings/errors
reported with GCC 12 were fixed.

Keeping this in sync with past/future GCC versions is going to be uphill
battle, so lets introduce new KERNEL_WERROR config option, enable it by
default only for tested/known working combinations and on buildbots.

References: #12687
Signed-off-by: Petr Štetiar <ynezz@true.cz>
(cherry picked from commit ce8c639a6c539534be14a540e7c3e9933d3a34ef)
This commit is contained in:
Petr Štetiar 2023-05-24 09:46:45 +02:00 committed by Christian Marangi
parent 677ecd09d2
commit 33612fdb92
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GPG Key ID: AC001D09ADBFEAD7
2 changed files with 17 additions and 1 deletions
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16
config/Config-kernel.in
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@ -1340,3 +1340,19 @@ config KERNEL_UBIFS_FS_SECURITY
config KERNEL_JFFS2_FS_SECURITY
bool "JFFS2 Security Labels"
config KERNEL_WERROR
bool "Compile the kernel with warnings as errors"
default BUILDBOT
default y if GCC_USE_VERSION_12
help
A kernel build should not cause any compiler warnings, and this
enables the '-Werror' (for C) and '-Dwarnings' (for Rust) flags
to enforce that rule by default. Certain warnings from other tools
such as the linker may be upgraded to errors with this option as
well.
However, if you have a new (or very old) compiler or linker with odd
and unusual warnings, or you have some architecture with problems,
you may need to disable this config option in order to
successfully build the kernel.

2
target/linux/generic/config-5.15
View File

@ -7476,7 +7476,7 @@ CONFIG_WATCHDOG_OPEN_TIMEOUT=0
# CONFIG_WD80x3 is not set
# CONFIG_WDAT_WDT is not set
# CONFIG_WDTPCI is not set
CONFIG_WERROR=y
# CONFIG_WERROR is not set
# CONFIG_WEXT_CORE is not set
# CONFIG_WEXT_PRIV is not set
# CONFIG_WEXT_PROC is not set