cg: Emit external weak linakge for global variables.

trailofbits · Oct 7, 2024 · 0a01243 · 0a01243
1 parent c1830ac
commit 0a01243
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/lib/vast/Dialect/Core/Linkage.cpp b/lib/vast/Dialect/Core/Linkage.cpp
@@ -170,6 +170,13 @@ namespace vast::core {
                 return GlobalLinkageKind::ExternalWeakLinkage;
             }
         }
+        if (const auto *var = llvm::dyn_cast< clang::VarDecl >(decl)) {
+            if (!var->hasDefinition() && var->isExternallyVisible()
+                && (var->hasAttr< clang::WeakAttr >() || var->isWeakImported()))
+            {
+                return core::GlobalLinkageKind::ExternalWeakLinkage;
+            }
+        }
 
         if (decl->hasAttr< clang::WeakAttr >()) {
             if (is_constant)