From e1f41ed9fafaf7eb4f2da6878a3fabcf2f7c021e Mon Sep 17 00:00:00 2001
From: _ov4 <ov4@ov4.org>
Date: Sat, 17 Oct 2026 09:13:32 +0000
Subject: feat(driver): compile multiple source files with INCLUDE visibility

Reject builds without an entry program and duplicate cross-file definitions.
Preserve source order for each unit's own constants and import visible exports.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 lib/CodeGen/FunctionGen.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'lib/CodeGen/FunctionGen.cc')

diff --git a/lib/CodeGen/FunctionGen.cc b/lib/CodeGen/FunctionGen.cc
index b66b55a..cc88a78 100644
--- a/lib/CodeGen/FunctionGen.cc
+++ b/lib/CodeGen/FunctionGen.cc
@@ -106,7 +106,8 @@ void FunctionGen::createArgumentAllocas(Function *F, const std::vector<ParamDecl
 
 const FuncSig *FunctionGen::getSignature(const std::string &Name) const {
     auto It = Signatures.find(Name);
-    return It == Signatures.end() ? nullptr : &It->second;
+    return It == Signatures.end() || (Visible && !Visible(It->second.OwnerUnit))
+               ? nullptr : &It->second;
 }
 
 Function *FunctionGen::emitPrototype(PrototypeAST *Proto) {
@@ -134,6 +135,7 @@ Function *FunctionGen::emitPrototype(PrototypeAST *Proto) {
     }
 
     FuncSig Sig;
+    Sig.OwnerUnit = CurrentUnit;
     Sig.Name = Proto->getLinkName();
     Sig.ReturnTypeName = Proto->getReturnType();
 
-- 
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