c import

src/core.zig

@@ -23,6 +23,7 @@ pub const Compilation = struct {
     root: ?*Node = null,
     resolved_root: ?*Node = null,
     import_sources: std.StringHashMap([:0]const u8),
+    module_scopes: std.StringHashMap(std.StringHashMap(void)),
     sema_result: ?sema.SemaResult = null,
     ir_emitter: ?ir.LLVMEmitter = null,
 
@@ -34,6 +35,7 @@ pub const Compilation = struct {
             .source = source,
             .diagnostics = errors.DiagnosticList.init(allocator, source, file_path),
             .import_sources = std.StringHashMap([:0]const u8).init(allocator),
+            .module_scopes = std.StringHashMap(std.StringHashMap(void)).init(allocator),
             .target_config = target_config,
         };
     }
@@ -66,6 +68,13 @@ pub const Compilation = struct {
             &self.diagnostics,
         ) catch return error.CompileError;
 
+        // Preserve per-module visibility scopes for C import access checking
+        self.module_scopes.put(self.file_path, mod.scope) catch {};
+        var cache_it = cache.iterator();
+        while (cache_it.next()) |entry| {
+            self.module_scopes.put(entry.key_ptr.*, entry.value_ptr.scope) catch {};
+        }
+
         // Store main file source in import_sources so error reporting can find it
         self.import_sources.put(self.file_path, self.source) catch {};
 
@@ -143,6 +152,7 @@ pub const Compilation = struct {
         lowering.resolved_root = root;
         lowering.target_config = self.target_config;
         lowering.diagnostics = &self.diagnostics;
+        lowering.module_scopes = &self.module_scopes;
         lowering.lowerRoot(root);
         if (self.diagnostics.hasErrors()) return error.CompileError;
         return module;