Prototype julia function when compiling to avoid implicit declaration warning

Author: brenhinkeller

src/StaticCompiler.jl

@@ -377,7 +377,9 @@ function generate_executable(f, tt, path=tempname(), name=GPUCompiler.safe_name(
         # Write a minimal wrapper to avoid having to specify a custom entry
         wrapper_path = joinpath(path, "wrapper.c")
         f = open(wrapper_path, "w")
-        print(f, """int main(int argc, char** argv)
+        print(f, """int julia_$name(int argc, char** argv);
+        
+        int main(int argc, char** argv)
         {
             julia_$name(argc, argv);
             return 0;