[PATCH] util/grub-mkrescue: specify -iso-level 3 in xorriso options

[jeffbai]

This is needed for architectures whose EFI executables has file names 
that
exceeds the 8.3 (extension.suffix) convention, such as LoongArch64
(bootloongarch64.efi).

Signed-off-by: Mingcong Bai <jeffbai@aosc.io>
---
 util/grub-mkrescue.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/util/grub-mkrescue.c b/util/grub-mkrescue.c
index abcc1c2f5..27696e034 100644
--- a/util/grub-mkrescue.c
+++ b/util/grub-mkrescue.c
@@ -514,6 +514,8 @@ main (int argc, char *argv[])
   xorriso_push ("-as");
   xorriso_push ("mkisofs");
   xorriso_push ("-graft-points");
+  xorriso_push ("-iso-level");
+  xorriso_push ("3");

   iso9660_dir = grub_util_make_temporary_dir ();
   grub_util_info ("temporary iso9660 dir is `%s'", iso9660_dir);
--
2.39.1