# HG changeset patch
# User Christian Kamm <kamm incasoftware de>
# Date 1236525671 -3600
# Node ID 186d44690036bcfb9f64dc43066926c5df9c6d00
# Parent  7f0e5ae75fcc741338a7586bcd572102989f8ca7
Give compile units LinkOnceLinkage to circumvent duplicate symbols with LLVM linking.

diff -r 7f0e5ae75fcc -r 186d44690036 gen/todebug.cpp
--- a/gen/todebug.cpp	Sun Mar 08 04:23:44 2009 +0100
+++ b/gen/todebug.cpp	Sun Mar 08 16:21:11 2009 +0100
@@ -500,6 +500,12 @@
         false, // isMain,
         false // isOptimized
     );
+    
+    // if the linkage stays internal, we can't llvm-link the generated modules together:
+    // llvm's DwarfWriter uses path and filename to determine the symbol name and we'd
+    // end up with duplicate symbols
+    m->ir.irModule->diCompileUnit.getGV()->setLinkage(llvm::GlobalValue::LinkOnceLinkage);
+    m->ir.irModule->diCompileUnit.getGV()->setName(std::string("llvm.dbg.compile_unit_") + srcpath + m->srcfile->name->toChars());
 
     return m->ir.irModule->diCompileUnit;
 }