[ARM,testsuite] Skip copysign_softfloat_1.c on hard-float targets

gcc/testsuite/

2017-11-10  Christophe Lyon  <christophe.lyon@linaro.org>

	* lib/target-supports.exp (check_effective_target_arm_soft_ok):
	New function.
	* gcc.target/arm/copysign_softfloat_1.c: Require arm_soft_ok
	effective target.

From-SVN: r254626

gcc/testsuite/ChangeLog

+2017-11-10  Christophe Lyon  <christophe.lyon@linaro.org>
+
+	* lib/target-supports.exp (check_effective_target_arm_soft_ok):
+	New function.
+	* gcc.target/arm/copysign_softfloat_1.c: Require arm_soft_ok
+	effective target.
+
 2017-11-10  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/82934

gcc/testsuite/gcc.target/arm/copysign_softfloat_1.c

 /* { dg-do run } */
 /* { dg-require-effective-target arm_thumb2_ok } */
+/* { dg-require-effective-target arm_soft_ok } */
 /* { dg-skip-if "skip override" { *-*-* } { "-mfloat-abi=softfp" "-mfloat-abi=hard" } { "" } } */
 /* { dg-options "-O2 -mfloat-abi=soft --save-temps" } */
 extern void abort (void);

gcc/testsuite/lib/target-supports.exp

@@ -3414,6 +3414,19 @@ proc check_effective_target_arm_vect_no_misalign { } {
 }
 
 
+# Return 1 if this is an ARM target supporting -mfloat-abi=soft.  Some
+# multilibs may be incompatible with this option.
+
+proc check_effective_target_arm_soft_ok { } {
+    if { [check_effective_target_arm32] } {
+	return [check_no_compiler_messages arm_soft_ok executable {
+	    int main() { return 0;}
+	} "-mfloat-abi=soft"]
+    } else {
+	return 0
+    }
+}
+
 # Return 1 if this is an ARM target supporting -mfpu=vfp
 # -mfloat-abi=softfp.  Some multilibs may be incompatible with these
 # options.