1 files changed, 16 insertions, 0 deletions
diff --git a/Modules/CheckVariableExists.c b/Modules/CheckVariableExists.c
new file mode 100644
index 0000000..e4d1e8d
--- /dev/null
+++ b/Modules/CheckVariableExists.c
@@ -0,0 +1,16 @@
+#ifdef CHECK_VARIABLE_EXISTS
+
+extern int CHECK_VARIABLE_EXISTS;
+
+int main()
+{
+  int* p;
+  p = &CHECK_VARIABLE_EXISTS;
+  return 0;
+}
+
+#else  /* CHECK_VARIABLE_EXISTS */
+
+#  error "CHECK_VARIABLE_EXISTS has to specify the variable"
+
+#endif /* CHECK_VARIABLE_EXISTS */