add on_fetch to binutils package (#4636)

* add on_fetch to binutils package

* Update xmake.lua

* Update xmake.lua

* check more tools in binutil's on_fetch

* fix boolean operator

---------

Co-authored-by: ruki <waruqi@gmail.com>

packages/b/binutils/xmake.lua

@@ -19,6 +19,31 @@ package("binutils")
         add_extsources("brew::binutils")
     end
 
+    on_fetch("@linux", "@macosx", "@msys", function (package, opt)
+        if opt.system then
+            if package:is_binary() then
+                local tools = {"lb", "ranlib", "objcopy"}
+                for _, tool in ipairs(tools) do
+                    if not package:find_tool(tool) then
+                        return
+                    end
+                end
+                return {}
+            elseif package:is_library() then
+                local libs = {"bfd", "ctf", "opcodes"}
+                local result
+                for _, lib in ipairs(libs) do
+                    local libinfo = package:find_package("system::" .. lib)
+                    if libinfo then
+                        result = result or {links = {}}
+                        table.insert(result.links, libinfo.links)
+                    end
+                end
+                return result
+            end
+        end
+    end)
+
     add_deps("bison")
 
     on_install("@linux", "@macosx", "@msys", function (package)