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-rw-r--r--Modules/CheckVariableExists.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/Modules/CheckVariableExists.c b/Modules/CheckVariableExists.c
new file mode 100644
index 000000000..752f6e486
--- /dev/null
+++ b/Modules/CheckVariableExists.c
@@ -0,0 +1,20 @@
+#ifdef CHECK_VARIABLE_EXISTS
+
+extern int CHECK_VARIABLE_EXISTS;
+
+#ifdef __CLASSIC_C__
+int main(){
+ int ac;
+ char*av[];
+#else
+int main(int ac, char*av[]){
+#endif
+ if(ac > 1000){return *av[0];}
+ return CHECK_VARIABLE_EXISTS;
+}
+
+#else /* CHECK_VARIABLE_EXISTS */
+
+# error "CHECK_VARIABLE_EXISTS has to specify the variable"
+
+#endif /* CHECK_VARIABLE_EXISTS */