From 019b5a03c6ac9b1e9d1f44c3e8ddb406bf9cf2bb Mon Sep 17 00:00:00 2001
From: Chris Bieneman <beanz@apple.com>
Date: Tue, 25 Jul 2017 20:53:31 +0000
Subject: [PATCH] [CMake] Allow TableGen.cmake to be included multiple times

This patch allows TableGen.cmake to be safely included multiple times in sub-projects.

llvm-svn: 309029
---
 llvm/cmake/modules/TableGen.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/cmake/modules/TableGen.cmake b/llvm/cmake/modules/TableGen.cmake
index 8c3e2d7..8ee7f97 100644
--- a/llvm/cmake/modules/TableGen.cmake
+++ b/llvm/cmake/modules/TableGen.cmake
@@ -110,7 +110,7 @@ function(add_public_tablegen_target target)
   set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} ${target} PARENT_SCOPE)
 endfunction()
 
-if(LLVM_USE_HOST_TOOLS)
+if(LLVM_USE_HOST_TOOLS AND NOT TARGET NATIVE_LIB_LLVMTABLEGEN)
   llvm_ExternalProject_BuildCmd(tblgen_build_cmd LLVMSupport
     ${LLVM_NATIVE_BUILD}
     CONFIGURATION Release)
-- 
2.7.4