feat(driver): link INCLUDE_OBJ objects and check EXTERN symbols

Each EXTERN symbol must be defined by an INCLUDE_OBJ object file or by
the embedded C library selected with INCLUDE_OBJ "__libc". Objects are
linked natively, loaded by the embedded JIT and passed to lli.

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

1 files changed, 13 insertions, 1 deletions

diff --git a/tools/driver/NativeCompiler.h b/tools/driver/NativeCompiler.h
index 5e13c4d..ffc38f1 100644
--- a/tools/driver/NativeCompiler.h
+++ b/tools/driver/NativeCompiler.h
@@ -1,9 +1,21 @@
 #pragma once
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSet.h"
+#include <string>
+#include <vector>
 
 namespace cps { class CodeGen; }
 
 // Generate a host executable without an external compiler, linker or SDK.
 // Failure leaves any existing output intact and reports a diagnostic.
-bool compileNative(const cps::CodeGen &CG, llvm::StringRef OutputPath, const char *Argv0);
+// Objects named by INCLUDE_OBJ are linked after the program object.
+bool compileNative(const cps::CodeGen &CG, llvm::StringRef OutputPath, const char *Argv0,
+                   const std::vector<std::string> &Objects);
+
+// Defined global C symbols of an INCLUDE_OBJ object file. Returns false with a
+// message when the file cannot be read or is not an object file.
+bool collectObjectSymbols(llvm::StringRef Path, llvm::StringSet<> &Out, std::string &Error);
+
+// Defined global symbols of the embedded C library (INCLUDE_OBJ "__libc").
+bool collectLibcSymbols(llvm::StringSet<> &Out);