Emit unused EH frames for weak definitions on Darwin,

because assembler/linker can't cope with weak absolutes.
PR 1880.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45811 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/include/llvm/Target/TargetAsmInfo.h b/include/llvm/Target/TargetAsmInfo.h
index c318275..8192b46 100644
--- a/include/llvm/Target/TargetAsmInfo.h
+++ b/include/llvm/Target/TargetAsmInfo.h
@@ -309,6 +309,10 @@ namespace llvm {
     ///
     const char *GlobalEHDirective;          // Defaults to NULL.
 
+    /// SupportsWeakEmptyEHFrame - True if target assembler and linker will
+    /// handle a weak_definition of constant 0 for an omitted EH frame.
+    bool SupportsWeakOmittedEHFrame;  // Defaults to true.
+
     /// DwarfSectionOffsetDirective - Special section offset directive.
     const char* DwarfSectionOffsetDirective; // Defaults to NULL
     
@@ -585,6 +589,9 @@ namespace llvm {
     const char *getGlobalEHDirective() const {
       return GlobalEHDirective;
     }
+    bool getSupportsWeakOmittedEHFrame() const {
+      return SupportsWeakOmittedEHFrame;
+    }
     const char *getDwarfSectionOffsetDirective() const {
       return DwarfSectionOffsetDirective;
     }