[RuntimeDyld] Guard UsedTLSStorage to x86 ELF only

UsedTLSStorage is only used in allocateTLSSection,
guarded in x87 ELF only.
So clang will emit error with -Werror on.

.../llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp:288:12:
error: private field 'UsedTLSStorage' is not used
[-Werror,-Wunused-private-field]
  unsigned UsedTLSStorage = 0;
           ^

diff --git a/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp b/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp
index 278f83b..02c11f7 100644 (file)
--- a/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp
+++ b/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp
@@ -285,7 +285,9 @@ private:
   uintptr_t SlabSize = 0;
   uintptr_t CurrentSlabOffset = 0;
   SectionIDMap *SecIDMap = nullptr;
+#if defined(__x86_64__) && defined(__ELF__)
   unsigned UsedTLSStorage = 0;
+#endif
 };
 
 uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,