feat(codegen): FUNCTION MAIN entry point

Invoke the internal entry function through the generated exception handler
and truncate its INTEGER result to the process exit status.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/cps/FunctionAST.h b/include/cps/FunctionAST.h
index 9b2d49b..4dfe908 100644
--- a/include/cps/FunctionAST.h
+++ b/include/cps/FunctionAST.h
@@ -1,5 +1,6 @@
 #pragma once
 #include "cps/AST.h"
+#include "cps/Identifier.h"
 #include <cstdint>
 #include <vector>
 #include <string>
@@ -46,7 +47,10 @@ public:
     bool isExternal() const { return IsExternal; }
     const std::string &getOwnerClass() const { return OwnerClass; }
     bool isPublic() const { return IsPublic; }
-    std::string getLinkName() const { return OwnerClass.empty() ? Name : OwnerClass + "." + Name; }
+    std::string getLinkName() const {
+        if (!OwnerClass.empty()) return OwnerClass + "." + Name;
+        return sameIdentifier(Name, "MAIN") ? "__cps_main" : Name;
+    }
 };
 
 class FunctionDefAST : public StmtAST {