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Linux: bump -std to gnu11

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Linux switched from -std=gnu89 to -std=gnu11 in 5.18
(torvalds/linux@e8c07082a8). We've always overridden that with gnu99
because we use some newer features.

More recent kernels are using C11 features in headers that we include.
GCC generally doesn't seem to care, but more recent versions of Clang
seem to be enforcing our gnu99 override more strictly, which breaks the
build in some configurations.

Just bumping our "override" to match the kernel seems to be the easiest
workaround. It's an effective no-op since 5.18, while still allowing us
to build on older kernels.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #17954
This commit is contained in:
Rob Norris 2025-11-19 22:37:49 +11:00 committed by Brian Behlendorf
parent f45622ff42
commit aa091a17bd
1 changed files with 1 additions and 1 deletions
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2
module/Kbuild.in
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@ -2,7 +2,7 @@
# first. This ensures its module initialization function is run before
# any of the other module initialization functions which depend on it.
ZFS_MODULE_CFLAGS += -std=gnu99 -Wno-declaration-after-statement
ZFS_MODULE_CFLAGS += -std=gnu11 -Wno-declaration-after-statement
ZFS_MODULE_CFLAGS += -Wmissing-prototypes
ZFS_MODULE_CFLAGS += @KERNEL_DEBUG_CFLAGS@ @KERNEL_NO_FORMAT_ZERO_LENGTH@