Add $PLT_CFLAGS to -fPIC for run_cc_link_tests

Some x86 linker tests expect PLT.  This patch adds $PLT_CFLAGS to -fPIC
for run_cc_link_tests.

	* ld-i386/i386.exp (run_cc_link_tests): Add $PLT_CFLAGS to
	-fPIC if needed.
	* ld-x86-64/mpx.exp (run_cc_link_tests): Likewise.
	* ld-x86-64/x86-64.exp (run_cc_link_tests): Likewise.

ld/testsuite/ChangeLog

@@ -1,3 +1,10 @@
+2015-07-27  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* ld-i386/i386.exp (run_cc_link_tests): Add $PLT_CFLAGS to
+	-fPIC if needed.
+	* ld-x86-64/mpx.exp (run_cc_link_tests): Likewise.
+	* ld-x86-64/x86-64.exp (run_cc_link_tests): Likewise.
+
 2015-07-27  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* ld-elfvsb/elfvsb.exp (visibility_run): Pass $PLT_CFLAGS to

ld/testsuite/ld-i386/i386.exp

@@ -310,6 +310,9 @@ run_dump_test "pr17057"
 run_dump_test "pr17935-1"
 run_dump_test "pr17935-2"
 
+# Add $PLT_CFLAGS if PLT is expected.
+global PLT_CFLAGS
+
 # Must be Linux native with the C compiler
 if { [isnative]
      && [istarget "i?86-*-linux*"]
@@ -342,7 +345,7 @@ if { [isnative]
 	[list \
 	    "Build libplt-main3.a" \
 	    "" \
-	    "-fPIC" \
+	    "-fPIC $PLT_CFLAGS" \
 	    { plt-main3.c } \
 	    {{readelf {-Wr} plt-main3.rd}} \
 	    "libplt-main3.a" \
@@ -350,7 +353,7 @@ if { [isnative]
 	[list \
 	    "Build libplt-main4.a" \
 	    "" \
-	    "-fPIC" \
+	    "-fPIC $PLT_CFLAGS" \
 	    { plt-main4.c } \
 	    {{readelf {-Wr} plt-main4.rd}} \
 	    "libplt-main4.a" \

ld/testsuite/ld-x86-64/mpx.exp

@@ -36,28 +36,59 @@ if { [which $CC] == 0 } {
     return
 }
 
-set build_tests {
+# Add $PLT_CFLAGS if PLT is expected.
-  {"Build libmpx1a.a"
+global PLT_CFLAGS
-   "" "-Wa,-madd-bnd-prefix -fPIC"
-   {mpx1a.c}  {{readelf {-r --wide} mpx1a.rd}} "libmpx1a.a"}
-  {"Build libmpx1b.a"
-   "" ""
-   {mpx1b.c} {} "libmpx1b.a"}
-  {"Build libmpx1c.a"
-   "" "-Wa,-madd-bnd-prefix"
-   {mpx1c.c} {{readelf {-r --wide} mpx1c.rd}} "libmpx1c.a"}
-  {"Build libmpx2a.a"
-   "" "-Wa,-madd-bnd-prefix -fPIE"
-   {mpx2a.c}  {{readelf {-r --wide} mpx2a.rd}} "libmpx2a.a"}
-  {"Build libmpx2b.a"
-   "" "-fPIE"
-   {mpx2b.c} {} "libmpx2b.a"}
-  {"Build libmpx2c.a"
-   "" "-Wa,-madd-bnd-prefix -fPIE"
-   {mpx2c.c} {{readelf {-r --wide} mpx2c.rd}} "libmpx2c.a"}
-}
 
-run_cc_link_tests $build_tests
+run_cc_link_tests [list \
+    [list \
+	"Build libmpx1a.a" \
+	"" \
+	"-Wa,-madd-bnd-prefix -fPIC $PLT_CFLAGS" \
+	{mpx1a.c} \
+	{{readelf {-r --wide} mpx1a.rd}} \
+	"libmpx1a.a" \
+    ] \
+    [list \
+	"Build libmpx1b.a" \
+	"" \
+	"" \
+	{mpx1b.c} \
+	{} \
+	"libmpx1b.a" \
+    ] \
+    [list \
+	"Build libmpx1c.a" \
+	"" \
+	"-Wa,-madd-bnd-prefix" \
+	{mpx1c.c} \
+	{{readelf {-r --wide} mpx1c.rd}} \
+	"libmpx1c.a" \
+    ] \
+    [list \
+	"Build libmpx2a.a" \
+	"" \
+	"-Wa,-madd-bnd-prefix -fPIE $PLT_CFLAGS" \
+	{mpx2a.c} \
+	{{readelf {-r --wide} mpx2a.rd}} \
+	"libmpx2a.a" \
+	] \
+    [list \
+	"Build libmpx2b.a" \
+	"" \
+	"-fPIE" \
+	{mpx2b.c} \
+	{} \
+	"libmpx2b.a" \
+    ] \
+    [list \
+	"Build libmpx2c.a" \
+	"" \
+	"-Wa,-madd-bnd-prefix -fPIE $PLT_CFLAGS" \
+	{mpx2c.c} \
+	{{readelf {-r --wide} mpx2c.rd}} \
+	"libmpx2c.a" \
+    ] \
+]
 
 set run_tests {
     {"Run mpx1"

ld/testsuite/ld-x86-64/x86-64.exp

@@ -326,6 +326,9 @@ run_dump_test "pr17935-2"
 run_dump_test "pr18160"
 run_dump_test "pr18176"
 
+# Add $PLT_CFLAGS if PLT is expected.
+global PLT_CFLAGS
+
 # Must be native with the C compiler
 if { [isnative] && [which $CC] != 0 } {
     run_cc_link_tests {
@@ -376,7 +379,7 @@ if { [isnative] && [which $CC] != 0 } {
 	[list \
 	    "Build libplt-main3.a" \
 	    "" \
-	    "-fPIC" \
+	    "-fPIC $PLT_CFLAGS" \
 	    { plt-main3.c } \
 	    {{readelf {-Wr} plt-main3.rd}} \
 	    "libplt-main3.a" \
@@ -384,7 +387,7 @@ if { [isnative] && [which $CC] != 0 } {
 	[list \
 	    "Build libplt-main4.a" \
 	    "" \
-	    "-fPIC" \
+	    "-fPIC $PLT_CFLAGS" \
 	    { plt-main4.c } \
 	    {{readelf {-Wr} plt-main4.rd}} \
 	    "libplt-main4.a" \