* ld-selective: New directory with new files to test

selective linking.

       * lib/ld-lib.exp (ld_nm):  Strip leading underscore from $name.

ld/testsuite/ld-selective/1.c

@@ -0,0 +1,12 @@
+/* _start should be the only thing left after GC.  */
+
+void _start() __asm__("_start");
+void _start()
+{
+}
+
+void dropme1()
+{
+}
+
+int dropme2[102] = { 0 };

ld/testsuite/ld-selective/2.c

@@ -0,0 +1,19 @@
+/* Normally we should loose foo and keep _start and _init. 
+   With -u foo, we should keep that as well.  */
+
+void _start() __asm__("_start");
+void _start()
+{
+}
+
+void __attribute__((section(".init")))
+_init()
+{
+}
+
+int foo() __asm__("foo");
+int foo()
+{
+  static int x = 1;
+  return x++;
+}

ld/testsuite/ld-selective/3.cc

@@ -0,0 +1,33 @@
+struct A
+{
+  virtual void foo();
+  virtual void bar();
+};
+
+void A::foo() { }			// keep
+void A::bar() { }			// loose
+
+struct B : public A
+{
+  virtual void foo();
+};
+
+void B::foo() { }			// keep
+
+void _start() __asm__("_start");	// keep
+
+A a;					// keep
+B b;
+A *getme() { return &a; }		// keep
+
+void _start()
+{
+  getme()->foo();
+}
+
+// In addition, keep A's virtual table.
+
+// We'll wind up keeping `b' and thus B's virtual table because
+// `a' and `b' are both referenced from the constructor function.
+
+extern "C" void __main() { }

ld/testsuite/ld-selective/4.cc

@@ -0,0 +1,28 @@
+struct A
+{
+  virtual void foo();
+  virtual void bar();
+};
+
+void A::foo() { }			// loose
+void A::bar() { }			// keep
+
+struct B : public A
+{
+  virtual void foo();
+};
+
+void B::foo() { }			// loose
+
+void _start() __asm__("_start");	// keep
+
+A a;					// keep
+B b;
+A *getme() { return &a; }		// keep
+
+void _start()
+{
+  getme()->bar();
+}
+
+extern "C" void __main() { }