mirror_zfs/config/kernel-kasan-enabled.m4
Rob Norris c9845a1332 Linux: work around use of GPL-only symbol kasan_flag_enabled
We may not be able to avoid our code referencing the symbol, but we can
ensure that a symbol of that name is available to the linker during
build, and so not require linking the GPL-exported version.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #18009
Closes #18040
2025-12-10 10:21:29 -08:00

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dnl #
dnl # 6.18: some architectures and config option causes the kasan_ inline
dnl # functions to reference the GPL-only symbol 'kasan_flag_enabled',
dnl # breaking the build. Detect this and work
dnl # around it.
AC_DEFUN([ZFS_AC_KERNEL_SRC_KASAN_ENABLED], [
ZFS_LINUX_TEST_SRC([kasan_enabled], [
#include <linux/kasan.h>
], [
kasan_enabled();
], [], [ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_KASAN_ENABLED], [
AC_MSG_CHECKING([whether kasan_enabled() is GPL-only])
ZFS_LINUX_TEST_RESULT([kasan_enabled_license], [
AC_MSG_RESULT(no)
], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KASAN_ENABLED_GPL_ONLY, 1,
[kasan_enabled() is GPL-only])
])
])