Fix testsuite fallout from r252976.

gcc/testsuite/ChangeLog:

	PR c/81854
	* gcc.dg/attr-ifunc-1.c: Correct type errors.
	* gcc.dg/attr-ifunc-2.c: Ditto.
	* gcc.dg/attr-ifunc-3.c: Ditto.
	* gcc.dg/attr-ifunc-4.c: Ditto.
	* gcc.dg/attr-ifunc-5.c: Ditto.
	* gcc.dg/pr81854.c: Require ifunc support.
	* gcc/testsuite/lib/target-supports.exp: Correct type error.

From-SVN: r253037

gcc/testsuite/ChangeLog

+2017-09-20  Martin Sebor  <msebor@redhat.com>
+
+	PR c/81854
+	* gcc.dg/attr-ifunc-1.c: Correct type errors.
+	* gcc.dg/attr-ifunc-2.c: Ditto.
+	* gcc.dg/attr-ifunc-3.c: Ditto.
+	* gcc.dg/attr-ifunc-4.c: Ditto.
+	* gcc.dg/attr-ifunc-5.c: Ditto.
+	* gcc.dg/pr81854.c: Require ifunc support.
+	* gcc/testsuite/lib/target-supports.exp: Correct type error.
+
 2017-09-20  Jeff Law  <law@redhat.com>
 
 	* gcc.target/i386/stack-check-11.c: Update test and regexp

gcc/testsuite/gcc.dg/attr-ifunc-1.c

@@ -2,15 +2,13 @@
 /* { dg-require-ifunc "" } */
 /* { dg-options "" } */
 
-typedef int F (void);
-
 static int implementation (void)
 {
   __builtin_printf ("'ere I am JH\n");
   return 0;
 }
 
-static F* resolver (void)
+static __typeof__ (implementation)* resolver (void)
 {
   return implementation;
 }

gcc/testsuite/gcc.dg/attr-ifunc-2.c

 /* { dg-require-ifunc "" } */
 
-static void *resolver ()
+typedef int F (void);
+
+static F *resolver ()
 {
   return 0;
 }

gcc/testsuite/gcc.dg/attr-ifunc-3.c

@@ -14,7 +14,7 @@ static int __attribute__((noinline))
   return 0;
 }
 
-static void *resolver (void)
+static __typeof__ (implementation) *resolver (void)
 {
   return (void *)implementation;
 }

gcc/testsuite/gcc.dg/attr-ifunc-4.c

@@ -4,15 +4,15 @@
 
 #include <stdio.h>
 
-static void *implementation (void)
+static int implementation (void)
 {
   printf ("'ere I am JH\n");
   return 0;
 }
 
-static void *resolver (void)
+static __typeof__ (implementation)* resolver (void)
 {
-  return (void *)implementation;
+  return implementation;
 }
 
 static int magic (void) __attribute__ ((ifunc ("resolver")));

gcc/testsuite/gcc.dg/attr-ifunc-5.c

@@ -4,13 +4,13 @@
 
 #include <stdio.h>
 
-static void *implementation (void)
+static int implementation (void)
 {
   printf ("'ere I am JH\n");
   return 0;
 }
 
-static void *resolver (void)
+static __typeof__ (implementation)* resolver (void)
 {
   return (void *)implementation;
 }

gcc/testsuite/gcc.dg/pr81854.c

 /* PR c/81854 - weak alias of an incompatible symbol accepted
-   { dg-do compile } */
+   { dg-do compile }
+   { dg-require-ifunc "" } */
 
 const char* __attribute__ ((weak, alias ("f0_target")))
 f0 (void);          /* { dg-error "alias between function and variable" } */

gcc/testsuite/lib/target-supports.exp

@@ -439,7 +439,8 @@ proc check_ifunc_available { } {
 	#ifdef __cplusplus
 	extern "C"
 	#endif
-	void g() {}
+	typedef void F (void);
+	F* g() {}
 	void f() __attribute__((ifunc("g")));
     }]
 }