use prototype for function pointer in static link libc init barrier

this is not needed for correctness, but doesn't hurt, and in some
cases the compiler may pessimize the call assuming the callee might be
variadic when it lacks a prototype.

diff --git a/src/env/__libc_start_main.c b/src/env/__libc_start_main.c
index f9aa019db30a3ddc64bb1a15ab8e5d29c1070d0e..b4965d7fdcfac47f09712adb3dfcd60eac3eb565 100644 (file)
--- a/src/env/__libc_start_main.c
+++ b/src/env/__libc_start_main.c
@@ -79,7 +79,7 @@ int __libc_start_main(int (*main)(int,char **,char **), int argc, char **argv)
 
        /* Barrier against hoisting application code or anything using ssp
         * or thread pointer prior to its initialization above. */
-       int (*stage2)();
+       int (*stage2)(int (*)(int,char **,char **), int, char **);
        __asm__ ( "" : "=r"(stage2) : "0"(libc_start_main_stage2) : "memory" );
        return stage2(main, argc, argv);
 }