i386: Add tests for PIE with undefined weak symbol

* testsuite/ld-i386/i386.exp: Run pie1 and pie1-nacl.
	* testsuite/ld-i386/pie1-nacl.d: New file.
	* testsuite/ld-i386/pie1.d: Likewise.
	* testsuite/ld-i386/pie1.s: Likewise.

ld/ChangeLog

@@ -1,3 +1,10 @@
+2017-07-17  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* testsuite/ld-i386/i386.exp: Run pie1 and pie1-nacl.
+	* testsuite/ld-i386/pie1-nacl.d: New file.
+	* testsuite/ld-i386/pie1.d: Likewise.
+	* testsuite/ld-i386/pie1.s: Likewise.
+
 2017-07-17  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/21782

ld/testsuite/ld-i386/i386.exp

@@ -434,6 +434,8 @@ run_dump_test "property-x86-shstk3a"
 run_dump_test "property-x86-shstk3b"
 run_dump_test "property-x86-shstk4"
 run_dump_test "property-x86-shstk5"
+run_dump_test "pie1"
+run_dump_test "pie1-nacl"
 
 if { !([istarget "i?86-*-linux*"]
        || [istarget "i?86-*-gnu*"]

ld/testsuite/ld-i386/pie1-nacl.d

@@ -0,0 +1,18 @@
+#source: pie1.s
+#as: --32
+#ld: -pie -melf_i386 -z relro
+#objdump: -dw --sym
+#target: i?86-*-nacl* x86_64-*-nacl*
+
+.*: +file format .*
+
+SYMBOL TABLE:
+#...
+10020000 l     O .got.plt	0+ _GLOBAL_OFFSET_TABLE_
+#...
+
+Disassembly of section .text:
+
+0+ <_start>:
+ +0:	8d 80 00 00 fe ef    	lea    -0x10020000\(%eax\),%eax
+#pass

ld/testsuite/ld-i386/pie1.d

@@ -0,0 +1,17 @@
+#as: --32
+#ld: -pie -melf_i386 -z relro
+#objdump: -dw --sym
+#notarget: i?86-*-nacl* x86_64-*-nacl*
+
+.*: +file format .*
+
+SYMBOL TABLE:
+#...
+0+2000 l     O .got.plt	0+ _GLOBAL_OFFSET_TABLE_
+#...
+
+Disassembly of section .text:
+
+0+129 <_start>:
+ +129:	8d 80 00 e0 ff ff    	lea    -0x2000\(%eax\),%eax
+#pass

ld/testsuite/ld-i386/pie1.s

@@ -0,0 +1,5 @@
+	.text
+	.global _start
+	.weak foo
+_start:
+	leal	foo@GOTOFF(%eax), %eax