Set PLT_CFLAGS to "-fplt" if supported

GCC 6 supports -fno-plt.  But some linker tests expect PLT.  This patch
defines PLT_CFLAGS to "-fplt" if target compiler supports it.

	* config/default.exp (PLT_CFLAGS): New.

diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog
index db1302f..a81149c 100644 (file)
--- a/ld/testsuite/ChangeLog
+++ b/ld/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2015-07-27  H.J. Lu  <hongjiu.lu@intel.com>
+
+       * config/default.exp (PLT_CFLAGS): New.
+
 2015-07-27  Szabolcs Nagy  <szabolcs.nagy@arm.com>
 
        PR ld/18705

diff --git a/ld/testsuite/config/default.exp b/ld/testsuite/config/default.exp
index e25189b..5acc963 100644 (file)
--- a/ld/testsuite/config/default.exp
+++ b/ld/testsuite/config/default.exp
@@ -278,3 +278,38 @@ if ![info exists LD] then {
 if ![info exists LDFLAGS] then {
     set LDFLAGS {}
 }
+
+# Set PLT_CFLAGS to "-fplt" if target compiler supports it.
+
+if { ![info exists PLT_CFLAGS] } then {
+    if { [which $CC] != 0 } {
+       # Check if gcc supports -fplt
+       set flags ""
+       if [board_info [target_info name] exists cflags] {
+           append flags " [board_info [target_info name] cflags]"
+       }
+       if [board_info [target_info name] exists ldflags] {
+           append flags " [board_info [target_info name] ldflags]"
+       }
+
+       set basename "tmpdir/plt[pid]"
+       set src ${basename}.c
+       set output ${basename}.o
+       set f [open $src "w"]
+       puts $f ""
+       close $f
+       remote_download host $src
+       set plt_available [run_host_cmd_yesno "$CC" "$flags -c -fplt $src -o $output"]
+       remote_file host delete $src
+       remote_file host delete $output
+       file delete $src
+
+       if { $plt_available == 1 } then {
+           set PLT_CFLAGS "-fplt"
+       } else {
+           set PLT_CFLAGS ""
+       }
+    } else {
+       set PLT_CFLAGS ""
+    }
+}