[PATCH] aarch64: Ensure const and sign correctness

[Pekka Seppänen]

Be const and sign correct by using a matching CIE augmentation type.
Use a builtin instead of relying <string.h> being included.

libgcc/ChangeLog:

        * config/aarch64/aarch64-unwind.h (aarch64_cie_signed_with_b_key):
        Use const unsigned type and a builtin.
        
Signed-off-by: Pekka Seppänen <p...@gcc.mail.kapsi.fi>
---
 libgcc/config/aarch64/aarch64-unwind.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libgcc/config/aarch64/aarch64-unwind.h 
b/libgcc/config/aarch64/aarch64-unwind.h
index 3ad2f8239ed..d669edd671b 100644
--- a/libgcc/config/aarch64/aarch64-unwind.h
+++ b/libgcc/config/aarch64/aarch64-unwind.h
@@ -40,8 +40,9 @@ aarch64_cie_signed_with_b_key (struct _Unwind_Context 
*context)
       const struct dwarf_cie *cie = get_cie (fde);
       if (cie != NULL)
        {
-         char *aug_str = cie->augmentation;
-         return strchr (aug_str, 'B') == NULL ? 0 : 1;
+         const unsigned char *aug_str = cie->augmentation;
+         return __builtin_strchr ((const char *) aug_str,
+                                  'B') == NULL ? 0 : 1;
        }
     }
   return 0;
-- 
2.34.1