1 files changed, 30 insertions, 0 deletions
diff --git a/libs/libevent/docs/cmake/CheckFunctionExistsEx.c b/libs/libevent/docs/cmake/CheckFunctionExistsEx.c
new file mode 100644
index 0000000000..5ee3e5913a
--- /dev/null
+++ b/libs/libevent/docs/cmake/CheckFunctionExistsEx.c
@@ -0,0 +1,30 @@
+#ifdef CHECK_FUNCTION_EXISTS
+
+#ifndef _WIN32
+char CHECK_FUNCTION_EXISTS();
+#endif
+
+#ifdef __CLASSIC_C__
+int main(){
+  int ac;
+  char*av[];
+#else
+int main(int ac, char*av[]){
+#endif
+#ifdef _WIN32
+  void * p = &CHECK_FUNCTION_EXISTS;
+#else
+  CHECK_FUNCTION_EXISTS();
+#endif
+  if(ac > 1000)
+    {
+    return *av[0];
+    }
+  return 0;
+}
+
+#else  /* CHECK_FUNCTION_EXISTS */
+
+#  error "CHECK_FUNCTION_EXISTS has to specify the function"
+
+#endif /* CHECK_FUNCTION_EXISTS */