From: Dave Chinner <dchinner@xxxxxxxxxx>
gcc 9.2.1 throws lots of new warnings during the build like this:
xfs_format.h:790:3: warning: taking address of packed member of ‘struct xfs_agfl’ may result in an unaligned pointer value [-Waddress-of-packed-member]
790 | &(XFS_BUF_TO_AGFL(bp)->agfl_bno[0]) : \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xfs_alloc.c:3149:13: note: in expansion of macro ‘XFS_BUF_TO_AGFL_BNO’
3149 | agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, agflbp);
| ^~~~~~~~~~~~~~~~~~~
We know this packed structure aligned correctly, so turn off this
warning to shut gcc up.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
---
include/builddefs.in | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/builddefs.in b/include/builddefs.in
index 4700b52706a7..6fdc9ebb70c7 100644
--- a/include/builddefs.in
+++ b/include/builddefs.in
@@ -13,7 +13,7 @@ OPTIMIZER = @opt_build@
MALLOCLIB = @malloc_lib@
LOADERFLAGS = @LDFLAGS@
LTLDFLAGS = @LDFLAGS@
-CFLAGS = @CFLAGS@ -D_FILE_OFFSET_BITS=64
+CFLAGS = @CFLAGS@ -D_FILE_OFFSET_BITS=64 -Wno-address-of-packed-member
BUILD_CFLAGS = @BUILD_CFLAGS@ -D_FILE_OFFSET_BITS=64
LIBRT = @librt@
--
2.24.0.rc0
