[committed] testsuite: pru: Fix pr64366.c for new -std=gnu23 default

[Dimitar Dimitrov]

Provide function declaration in order to fix the test case build with
the new -std=gnu23 default.

Pushed to trunk.

gcc/testsuite/ChangeLog:

        * gcc.target/pru/pr64366.c (foobar): Provide full function
        delaration.

Signed-off-by: Dimitar Dimitrov <dimi...@dinux.eu>
---
 gcc/testsuite/gcc.target/pru/pr64366.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.target/pru/pr64366.c 
b/gcc/testsuite/gcc.target/pru/pr64366.c
index 1608d469499..8a7f78e338f 100644
--- a/gcc/testsuite/gcc.target/pru/pr64366.c
+++ b/gcc/testsuite/gcc.target/pru/pr64366.c
@@ -63,7 +63,7 @@ typedef struct BigStruct{
   int8_t xx;
 }  BigStruct;
 
-extern void foobar();
+extern void foobar(const char *fmt, ...);
 
 void
 test_large_fn (uint8_t ui8_1, int8_t si8_1, uint16_t ui16_1, int16_t si16_1,
-- 
2.47.0