[lld][WebAssembly] -Bdynamic by default if -pie or -shared is specified

Author: yamt

lld/wasm/Driver.cpp

@@ -554,6 +554,11 @@ static void readConfigs(opt::InputArgList &args) {
   config->zStackSize =
       args::getZOptionValue(args, OPT_z, "stack-size", WasmPageSize);
 
+  // -Bdynamic by default if -pie or -shared is specified.
+  if (config->pie || config->shared) {
+    config->isStatic = false;
+  }
+
   if (config->maxMemory != 0 && config->noGrowableMemory) {
     // Erroring out here is simpler than defining precedence rules.
     error("--max-memory is incompatible with --no-growable-memory");