Re: grub/head build with pre-release GCC10 ; fail @ "grub-core/disk/mdraid1x_linux.c:181:15: error: ..."

[PGNet Dev]

my bad re: patch. pebkac (looking UP might help :-/ )

with

        diff -ur grub.ORIG/grub-core/disk/mdraid1x_linux.c 
grub/grub-core/disk/mdraid1x_linux.c
        --- grub.ORIG/grub-core/disk/mdraid1x_linux.c   2020-03-24 
09:24:08.656640265 -0700
        +++ grub/grub-core/disk/mdraid1x_linux.c        2020-03-24 
09:58:27.638619782 -0700
        @@ -179,7 +179,8 @@
         
               if (grub_disk_read (disk, sector, 
                                  (char *) &sb.dev_roles[grub_le_to_cpu32 
(sb.dev_number)]
        -                         - (char *) &sb,
        +                         ((char *) &sb.dev_roles - (char *) sb)
        +                         + grub_le_to_cpu32 (sb.dev_number) * 
sizeof(grub_uint16_t),
                                  sizeof (role), &role))
                return NULL;

gcc10 build returns,

        ...
        make
                ...
                grub-core/disk/mdraid1x_linux.c: In function 
‘grub_mdraid_detect’:
                grub-core/disk/mdraid1x_linux.c:182:6: error: cannot convert to 
a pointer type
                  182 |      ((char *) &sb.dev_roles - (char *) sb)
                      |      ^
                grub-core/disk/mdraid1x_linux.c:181:16: error: called object is 
not a function or function pointer
                  181 |      (char *) &sb.dev_roles[grub_le_to_cpu32 
(sb.dev_number)]
                      |                ^~
                make[2]: *** [Makefile:7059: 
grub-core/disk/libgrubmods_a-mdraid1x_linux.o] Error 1
                make[2]: Leaving directory '/usr/local/src/grub'
                make[1]: *** [Makefile:11920: all-recursive] Error 1
                make[1]: Leaving directory '/usr/local/src/grub'
                make: *** [Makefile:3772: all] Error 2