GCC: libgcc/unwind-c.c:46:1: error: ‘parse_lsda_header’ defined but not used

[Blackhex]

Recent GCC commit Windows-on-ARM-Experiments/gcc-woarm64@71c7b44 added -Werror when building libgcc and it fails on this error:

Issue

/root/mingw-woarm64-build/code/gcc/libgcc/unwind-c.c:46:1: error: ‘parse_lsda_header’ defined but not used [-Werror=unused-function]
   46 | parse_lsda_header (struct _Unwind_Context *context, const unsigned char *p,
      | ^~~~~~~~~~~~~~~~~

Workaround

The current workaround is to add -Wno-error=unused-function to libgcc/config/aarch64/t-aarch64.