Update.

* elf/Makefile: Add rules to build and run initfirst test.
	* elf/initfirst.c: New file.
	* elf/firstobj.c: New file.

elf/initfirst.c

@@ -0,0 +1,22 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+int
+main (void)
+{
+  void *h = dlopen ("firstobj.so", RTLD_LAZY);
+  void *f;
+  if (! h)
+    {
+      printf ("cannot find firstobj.so: %s\n", dlerror ());
+      return 1;
+    }
+  f = dlsym (h, "foo");
+  if (! f)
+    {
+      printf ("cannot find symbol foo: %s\n", dlerror ());
+      return 2;
+    }
+  ((void (*) (void)) f) ();
+  return 0;
+}