Silence dozens of useless warnings from ranlib on macOS [ci skip]

configure.ac

@@ -433,6 +433,12 @@ AS_CASE(["$build_os"],
     ])
     rm -fr conftest*
   ])
+AS_CASE(["$build_os"],
+  [darwin*], [
+    AC_SUBST(X_WRAPPER_AR, "`cd -P "${tooldir}" && pwd`/darwin-ar $AR")
+  ], [
+    AC_SUBST(X_WRAPPER_AR, "$AR")
+  ])
 AS_CASE(["$target_os"],
   [wasi*], [
     # Clang linker automatically uses wasm-opt with -O if it found.

template/Makefile.in

@@ -230,7 +230,7 @@ RMALL         = @RMALL@
 LN_S          = @LN_S@
 TOUCH         = touch
 NM            = @NM@
-AR            = @AR@
+AR            = @X_WRAPPER_AR@
 ARFLAGS       = @ARFLAGS@$(empty)
 RANLIB        = @RANLIB@
 AS            = @AS@

tool/darwin-ar

@@ -0,0 +1,5 @@
+#!/bin/bash
+exec 2> >(exec grep -v \
+  -e 'has no symbols$' \
+  >&2)
+exec "$@"