Some subtargets don't provide the canonical function names as
the symbol name in C libraries, and libcalls will only work if
the builtins are patched to emit the correct library name.

For example, on NetBSD, cabsl has the symbol name __c99_cabsl,
and the patching is done via netbsd_patch_builtin.

With this change, libgfortran.so is correctly built with a
reference to __c99_cabsl, instead of "cabsl" which is not defined.

gcc/ChangeLog:
        * config/aarch64/aarch64-builtins.c
          (aarch64_general_init_builtins): Call SUBTARGET_INIT_BUILTINS.
---
 gcc/config/aarch64/aarch64-builtins.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/config/aarch64/aarch64-builtins.c 
b/gcc/config/aarch64/aarch64-builtins.c
index 25ab866ccd4..df13c9be051 100644
--- a/gcc/config/aarch64/aarch64-builtins.c
+++ b/gcc/config/aarch64/aarch64-builtins.c
@@ -1459,6 +1459,10 @@ aarch64_general_init_builtins (void)
 
   if (TARGET_MEMTAG)
     aarch64_init_memtag_builtins ();
+
+#ifdef SUBTARGET_INIT_BUILTINS
+  SUBTARGET_INIT_BUILTINS;
+#endif
 }
 
 /* Implement TARGET_BUILTIN_DECL for the AARCH64_BUILTIN_GENERAL group.  */
-- 
2.28.0

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