Add a compile-time test for PR ld/22263

This compile-time test requires a target C compiler to run.  It fails
on many targets where ELF backend linkers incorrectly check bfd_link_pic
for TLS relocations, which should check bfd_link_executable instead.

	PR ld/22263
	* testsuite/ld-elf/pr22263-1.rd: New file.
	* testsuite/ld-elf/pr22263-1a.c: Likewise.
	* testsuite/ld-elf/pr22263-1b.c: Likewise.
	* testsuite/ld-elf/tls.exp: Likewise.

ld/ChangeLog

@@ -1,3 +1,11 @@
+2017-10-12  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR ld/22263
+	* testsuite/ld-elf/pr22263-1.rd: New file.
+	* testsuite/ld-elf/pr22263-1a.c: Likewise.
+	* testsuite/ld-elf/pr22263-1b.c: Likewise.
+	* testsuite/ld-elf/tls.exp: Likewise.
+
 2017-10-12  Nick Clifton  <nickc@redhat.com>
 
 	* testsuite/ld-aarch64/pcrel_pic_defined.d: Expect errors not

ld/testsuite/ld-elf/pr22263-1.rd

@@ -0,0 +1,2 @@
+
+There are no relocations in this file.

ld/testsuite/ld-elf/pr22263-1a.c

@@ -0,0 +1,7 @@
+__thread int * foo;
+
+void
+bar (void)
+{
+  *foo = 1;
+}

ld/testsuite/ld-elf/pr22263-1b.c

@@ -0,0 +1,12 @@
+extern __thread int *foo;
+ 
+static int x;
+
+extern void bar (void);
+
+int
+_start ()
+{
+  foo = &x;
+  return 0;
+}

ld/testsuite/ld-elf/tls.exp

@@ -0,0 +1,51 @@
+# Expect script for TLS tests.
+#   Copyright (C) 2017 Free Software Foundation, Inc.
+#
+# This file is part of the GNU Binutils.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
+#
+
+# Make sure that binutils can correctly handle TLS.
+
+if { ![istarget *-*-linux*]
+     && ![istarget *-*-nacl*]
+     && ![istarget *-*-gnu*] } {
+    return
+}
+
+if { [istarget *-*-linux*aout*]
+     || [istarget *-*-linux*oldld*] } {
+    return
+}
+
+# Check to see if the C compiler works.
+if { [which $CC] == 0 } {
+    return
+}
+
+run_ld_link_tests [list \
+    [list \
+	"Build pr22263-1" \
+	"-pie -e _start" \
+	"" \
+	"" \
+	{ pr22263-1a.c pr22263-1b.c } \
+	{{readelf -r pr22263-1.rd}} \
+	"pr22263-1" \
+	"-fPIE -O2" \
+    ] \
+]