diff options
| author | Etienne Dechamps <[email protected]> | 2012-07-25 14:38:58 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2012-07-26 13:42:57 -0700 |
| commit | 705741827ab55e7d92c3eb74f332a5ddd24971b5 (patch) | |
| tree | 1b8ca75c3355fb84cba4fddd0c7b4852be95d763 /config/kernel-bdi-setup-and-register.m4 | |
| parent | fc88a6dda92a4fc00491a8afa24d144cc94063e4 (diff) | |
When checking for symbol exports, try compiling.
This patch adds a new autoconf function: ZFS_LINUX_TRY_COMPILE_SYMBOL.
This new function does the following:
- Call LINUX_TRY_COMPILE with the specified parameters.
- If unsuccessful, return false.
- If successful and we're configuring with --enable-linux-builtin,
return true.
- Else, call CHECK_SYMBOL_EXPORT with the specified parameters and
return the result.
All calls to CHECK_SYMBOL_EXPORT are converted to
LINUX_TRY_COMPILE_SYMBOL so that the tests work even when configuring
for builtin on a kernel which doesn't have loadable module support, or
hasn't been built yet.
Signed-off-by: Brian Behlendorf <[email protected]>
Issue #851
Diffstat (limited to 'config/kernel-bdi-setup-and-register.m4')
| -rw-r--r-- | config/kernel-bdi-setup-and-register.m4 | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/config/kernel-bdi-setup-and-register.m4 b/config/kernel-bdi-setup-and-register.m4 index 56fab8757..4196091e9 100644 --- a/config/kernel-bdi-setup-and-register.m4 +++ b/config/kernel-bdi-setup-and-register.m4 @@ -5,11 +5,17 @@ dnl # exported by the kernel. This is a trivial helper function but dnl # using it significantly simplifies the code surrounding setting dnl # up and tearing down the bdi structure. dnl # -AC_DEFUN([ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER], [ - ZFS_CHECK_SYMBOL_EXPORT( - [bdi_setup_and_register], - [mm/backing-dev.c], - [AC_DEFINE(HAVE_BDI_SETUP_AND_REGISTER, 1, - [bdi_setup_and_register() is available])], - []) +AC_DEFUN([ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER], + [AC_MSG_CHECKING([whether bdi_setup_and_register() is available]) + ZFS_LINUX_TRY_COMPILE_SYMBOL([ + #include <linux/backing-dev.h> + ], [ + bdi_setup_and_register(NULL, NULL, 0); + ], [bdi_setup_and_register], [mm/backing-dev.c], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BDI_SETUP_AND_REGISTER, 1, + [bdi_setup_and_register() is available]) + ], [ + AC_MSG_RESULT(no) + ]) ]) |