diff --git a/clang/lib/Driver/ToolChains/WebAssembly.cpp b/clang/lib/Driver/ToolChains/WebAssembly.cpp
--- a/clang/lib/Driver/ToolChains/WebAssembly.cpp
+++ b/clang/lib/Driver/ToolChains/WebAssembly.cpp
@@ -77,6 +77,12 @@
 
   const char *Crt1 = "crt1.o";
   const char *Entry = NULL;
+
+  // If crt1-command.o exists, it supports new-style commands, so use it.
+  // Otherwise, use the old crt1.o.
+  if (ToolChain.GetFilePath("crt1-command.o") != "crt1-command.o")
+    Crt1 = "crt1-command.o";
+
   if (const Arg *A = Args.getLastArg(options::OPT_mexec_model_EQ)) {
     StringRef CM = A->getValue();
     if (CM == "command") {