From: Chris Bieneman <beanz@apple.com>
Date: Tue, 25 Jul 2017 20:53:31 +0000 (+0000)
Subject: [CMake] Allow TableGen.cmake to be included multiple times
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=02829e6c9c79402c45a6acb42570c013bb9a52db;p=llvm

[CMake] Allow TableGen.cmake to be included multiple times

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309029 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/cmake/modules/TableGen.cmake b/cmake/modules/TableGen.cmake
index 8c3e2d7d700..8ee7f970991 100644
--- a/cmake/modules/TableGen.cmake
+++ b/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)