On Fri, Mar 23, 2018 at 06:57:42PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
>
> Enable link time optimization (LTO) if the builder requests it. The
> extra link optimization results in smaller binaries.
>
> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Are you seeing this? When I try compiling with --enable-lto, I'm
getting a large number of what appear to be spurious compiler warnings:
LD e2fsck
/usr/projects/e2fsprogs/e2fsprogs-maint/lib/ext2fs/ext2fsP.h:178:13: warning: type of ‘ext2fs_warn_bitmap32’ does not match original declaration [-Wlto-type-mismatch]
extern void ext2fs_warn_bitmap32(ext2fs_generic_bitmap bitmap,const char *func);
^
/usr/projects/e2fsprogs/e2fsprogs-maint/lib/ext2fs/gen_bitmap64.c:745:6: note: ‘ext2fs_warn_bitmap32’ was previously declared here
void ext2fs_warn_bitmap32(ext2fs_generic_bitmap bitmap, const char *func)
^
/usr/projects/e2fsprogs/e2fsprogs-maint/lib/ext2fs/gen_bitmap64.c:745:6: note: code may be misoptimized unless -fno-strict-aliasing is used
/usr/projects/e2fsprogs/e2fsprogs-maint/lib/ext2fs/bitops.h:106:13: warning: type of ‘ext2fs_unmark_block_bitmap_range’ does not match original declaration [-Wlto-type-mismatch]
extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
^
/usr/projects/e2fsprogs/e2fsprogs-maint/lib/ext2fs/gen_bitmap.c:593:6: note: ‘ext2fs_unmark_block_bitmap_range’ was previously declared here
void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
^
/usr/projects/e2fsprogs/e2fsprogs-maint/lib/ext2fs/gen_bitmap.c:593:6: note: code may be misoptimized unless -fno-strict-aliasing is used
...
This is using gcc version: gcc (Debian 7.3.0-12) 7.3.0
- Ted
