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Linux build: handle CONFIG_OBJTOOL_WERROR=y

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Linux 5.16 by default fails the build on objtool warnings. We have
known and understood objtool warnings we can't fix without
involving Linux maintainers.

To work around this we introduce an objtool wrapper script which
removes the `--Werror` flag.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Attila Fülöp <attila@fueloep.org>
Closes #17456
This commit is contained in:
Attila Fülöp
2025-06-16 17:12:09 +02:00
committed by GitHub
parent bd27b75401
commit 6cf17f6538
7 changed files with 98 additions and 0 deletions
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config/kernel-objtool.m4
+17
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@@ -49,6 +49,15 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_OBJTOOL], [
#error "STACK_FRAME_NON_STANDARD is not defined."
#endif
])
dnl # 6.15 made CONFIG_OBJTOOL_WERROR=y the default. We need to handle
dnl # this or our build will fail.
ZFS_LINUX_TEST_SRC([config_objtool_werror], [
#if !defined(CONFIG_OBJTOOL_WERROR)
#error "CONFIG_OBJTOOL_WERROR is not defined."
#endif
])
])
AC_DEFUN([ZFS_AC_KERNEL_OBJTOOL], [
@@ -84,6 +93,14 @@ AC_DEFUN([ZFS_AC_KERNEL_OBJTOOL], [
],[
AC_MSG_RESULT(no)
])
AC_MSG_CHECKING([whether CONFIG_OBJTOOL_WERROR is defined])
ZFS_LINUX_TEST_RESULT([config_objtool_werror],[
AC_MSG_RESULT(yes)
CONFIG_OBJTOOL_WERROR_DEFINED=yes
],[
AC_MSG_RESULT(no)
])
],[
AC_MSG_RESULT(no)
])