diff options
| author | David Sterba <dsterba@suse.com> | 2016-10-14 18:39:40 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-10-25 14:28:36 +0200 |
| commit | cf8fd1a70884db0b31e312d0780611f262bb9b45 (patch) | |
| tree | 88717f4d22793aa3fa04876244c08d0234c29dbc /configure.ac | |
| parent | 508000138c53707c961ce7364aff798e594604b7 (diff) | |
btrfs-progs: build: detect fiemap shared flag but don't fail build
The FIEMAP_EXTENT_SHARED fiemap flag was introduced in 2.6.33. If the
headers do not provide the definition, the build will fail. The support
of the fiemap sharing depends on the running kernel. There are still
systems with 2.6.32 kernel headers but running newer versions.
To support such environment, don't fail build, provide own defintion of
the structure and detect if there's an old kernel in use in the relevant
command (btrfs fi du).
Reported-by: Abhay Sachan <lkp.abhay@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 8fd8f425..9c6df3b9 100644 --- a/configure.ac +++ b/configure.ac @@ -144,8 +144,16 @@ if test "$DISABLE_BTRFSCONVERT" = 0 && test "x$convertfs" = "x"; then AC_MSG_ERROR([no filesystems for convert, use --disable-convert instead]) fi +HAVE_OWN_FIEMAP_EXTENT_SHARED_DEFINE=0 AX_CHECK_DEFINE([linux/fiemap.h], [FIEMAP_EXTENT_SHARED], [], - [AC_MSG_ERROR([no definition of FIEMAP_EXTENT_SHARED found])]) + [HAVE_OWN_FIEMAP_EXTENT_SHARED_DEFINE=1 + AC_MSG_WARN([no definition of FIEMAP_EXTENT_SHARED found, probably old kernel, will use own defintion, 'btrfs fi du' might report wrong numbers])]) + +if test "x$HAVE_OWN_FIEMAP_EXTENT_SHARED_DEFINE" == "x1"; then +AC_DEFINE([HAVE_OWN_FIEMAP_EXTENT_SHARED_DEFINE], [1], [We defined FIEMAP_EXTENT_SHARED]) +else +AC_DEFINE([HAVE_OWN_FIEMAP_EXTENT_SHARED_DEFINE], [0], [We did not define FIEMAP_EXTENT_SHARED]) +fi dnl Define <NAME>_LIBS= and <NAME>_CFLAGS= by pkg-config dnl |