Add tests for --add-needed/--copy-dt-needed-entries

* ld-elf/shared.exp (build_tests): Build libneeded1b.so,
	libneeded1a.so and libneeded1c.o.
	(run_tests): Test --add-needed and --copy-dt-needed-entries.
	Add tests for --no-add-needed and --no-copy-dt-needed-entries.

	* ld-elf/needed1.out: New file.
	* ld-elf/needed1a.c: Likewise.
	* ld-elf/needed1b.c: Likewise.
	* ld-elf/needed1c.c: Likewise.

ld/testsuite/ChangeLog

@@ -1,3 +1,15 @@
+2012-12-04  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* ld-elf/shared.exp (build_tests): Build libneeded1b.so,
+	libneeded1a.so and libneeded1c.o.
+	(run_tests): Test --add-needed and --copy-dt-needed-entries.
+	Add tests for --no-add-needed and --no-copy-dt-needed-entries.
+
+	* ld-elf/needed1.out: New file.
+	* ld-elf/needed1a.c: Likewise.
+	* ld-elf/needed1b.c: Likewise.
+	* ld-elf/needed1c.c: Likewise.
+
 2012-12-03  Maciej W. Rozycki  <macro@codesourcery.com>
 
 	* ld-mips-elf/attr-gnu-4-45.d: Add missing "readelf" keyword.

ld/testsuite/ld-elf/needed1.out

@@ -0,0 +1,2 @@
+OK
+OK

ld/testsuite/ld-elf/needed1a.c

@@ -0,0 +1,7 @@
+extern void bar (void);
+
+void
+foo (void)
+{
+  bar ();
+}

ld/testsuite/ld-elf/needed1b.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+void
+bar (void)
+{
+  printf ("OK\n");
+}

ld/testsuite/ld-elf/needed1c.c

@@ -0,0 +1,10 @@
+extern void foo (void);
+extern void bar (void);
+
+int
+main ()
+{
+  foo ();
+  bar ();
+  return 0;
+}

ld/testsuite/ld-elf/shared.exp

@@ -179,6 +179,15 @@ set build_tests {
   {"Build libpr14862.so"
    "-shared -Wl,--version-script=pr11138-1.map" "-fPIC"
    {pr14862-2.c} {} "libpr14862.so"}
+  {"Build libneeded1b.so"
+   "-shared" "-fPIC"
+   {needed1b.c} {} "libneeded1b.so"}
+  {"Build libneeded1a.so"
+   "-shared -Ltmpdir -lneeded1b" "-fPIC"
+   {needed1a.c} {} "libneeded1a.so"}
+  {"Build libneeded1c.o"
+   "-r -nostdlib" ""
+   {needed1c.c} {} "libneeded1c.o"}
 }
 
 run_cc_link_tests $build_tests
@@ -317,11 +326,33 @@ set run_tests {
     {"Run with pr14862-1.c libpr14862.so"
      "--as-needed tmpdir/libpr14862-1.o tmpdir/libpr14862.so" ""
      {dummy.c} "pr14862" "pr14862.out"}
+    {"Link with --add-needed"
+     "tmpdir/libneeded1c.o --add-needed -rpath=tmpdir -Ltmpdir -lneeded1a" ""
+     {dummy.c} "needed1a" "needed1.out"}
+    {"Link with --copy-dt-needed-entries"
+     "tmpdir/libneeded1c.o --copy-dt-needed-entries -rpath=tmpdir -Ltmpdir -lneeded1a" ""
+     {dummy.c} "needed1b" "needed1.out"}
 }
 
 # NetBSD ELF systems do not currently support the .*_array sections.
 run_ld_link_exec_tests [list "*-*-netbsdelf*"] $run_tests
 
+# Check --no-add-needed and --no-copy-dt-needed-entries
+set testname "--no-add-needed"
+set exec_output [run_host_cmd "$CC" "$gcc_gas_flag $gcc_ld_flag tmpdir/libneeded1c.o -Wl,--no-add-needed,-rpath-link=tmpdir -Ltmpdir -lneeded1a"]
+if { [ regexp "'bar' is defined in DSO tmpdir/libneeded1b.so" $exec_output ] } {
+    pass $testname
+} {
+    fail $testname
+}
+set testname "--no-copy-dt-needed-entries"
+set exec_output [run_host_cmd "$CC" "$gcc_gas_flag $gcc_ld_flag tmpdir/libneeded1c.o -Wl,--no-copy-dt-needed-entries,-rpath-link=tmpdir -Ltmpdir -lneeded1a"]
+if { [ regexp "'bar' is defined in DSO tmpdir/libneeded1b.so" $exec_output ] } {
+    pass $testname
+} {
+    fail $testname
+}
+
 # Check to see if the C++ compiler works
 if { [which $CXX] == 0 } {
     return