As suggested in long ago in a galaxy far, far away [1], I tried
turning it on and it seems to work, as is evidenced by the Mesa
package in Debian/ia64. Please enable it with the following patch.
[1] https://sourceware.org/ml/binutils/2007-07/msg00241.html
bfd * elfnn-ia64.c (elf_backend_can_gc_sections): Enable.
+2018-02-20 Jason Duerstock <jason.duerstock@gmail.com>
+
+ * elfnn-ia64.c (elf_backend_can_gc_sections): Enable.
+
2018-02-19 Maciej W. Rozycki <macro@mips.com>
Revert
elfNN_ia64_print_private_bfd_data
#define elf_backend_plt_readonly 1
+#define elf_backend_can_gc_sections 1
#define elf_backend_want_plt_sym 0
#define elf_backend_plt_alignment 5
#define elf_backend_got_header_size 0