diff options
| author | Nikolay Borisov <[email protected]> | 2016-07-29 18:48:33 +0300 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2016-08-01 12:43:01 -0700 |
| commit | 4b9dddf43084306de34394d666b874b912ca42ca (patch) | |
| tree | e3bd770b12a4d1fd955bc4c9b3770be038c05ceb | |
| parent | fb833883872ba17f1f04f99741b6f47cf404c340 (diff) | |
Add handling for kernel 4.7's CONFIG_TRIM_UNUSED_KSYMS
Kernel 4.7 added the option to trim the unused exported symbols. In
my testing this showed to be problematic since the PDE_DATA function
was considered unused and as such was trimmed. This in turn caused the
respective test during spl's configure stage to falsely detect that
PDE_DATA is not defined, which in turn caused build failures later.
Handle this situation by adding detection whether CONFIG_TRIM_UNUSED_KSYMS
is enabled and refuse to build against a kernel which has it enabled
Signed-off-by: Nikolay Borisov <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #565
| -rw-r--r-- | config/spl-build.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/config/spl-build.m4 b/config/spl-build.m4 index e9eb77861..3ed0e8fd0 100644 --- a/config/spl-build.m4 +++ b/config/spl-build.m4 @@ -24,6 +24,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [ SPL_AC_ATOMIC_SPINLOCK SPL_AC_SHRINKER_CALLBACK SPL_AC_CTL_NAME + SPL_AC_CONFIG_TRIM_UNUSED_KSYMS SPL_AC_PDE_DATA SPL_AC_SET_FS_PWD_WITH_CONST SPL_AC_2ARGS_VFS_UNLINK @@ -1249,6 +1250,26 @@ AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [ ]) dnl # +dnl # config trim unused symbols, +dnl # Verify the kernel has CONFIG_TRIM_UNUSED_KSYMS DISABLED. +dnl # +AC_DEFUN([SPL_AC_CONFIG_TRIM_UNUSED_KSYMS], [ + AC_MSG_CHECKING([whether CONFIG_TRIM_UNUSED_KSYM is disabled]) + SPL_LINUX_TRY_COMPILE([ + #if defined(CONFIG_TRIM_UNUSED_KSYMS) + #error CONFIG_TRIM_UNUSED_KSYMS not defined + #endif + ],[ ],[ + AC_MSG_RESULT([yes]) + ],[ + AC_MSG_RESULT([no]) + AC_MSG_ERROR([ + *** This kernel has unused symbols trimming enabled, please disable. + *** Rebuild the kernel with CONFIG_TRIM_UNUSED_KSYMS=n set.]) + ]) +]) + +dnl # dnl # 2.6.39 API compat, dnl # The function zlib_deflate_workspacesize() now take 2 arguments. dnl # This was done to avoid always having to allocate the maximum size |