commit 27e0a3d2cfb3601a31775d203364432bf4237dec
author Mehdi Amini <mehdi.amini@apple.com> Fri Nov 11 04:27:59 2016 +0000
committer Copybara-Service <copybara-worker@google.com> Thu Oct 08 20:32:08 2020 -0700
tree 8b081e93621e8bce2e02ef54efe8fb9d0e0b19b5
parent 6b9ec8e5ae90a6cf82efa8093b06d9dedcc80129

CMake: make LLVM_OPTIMIZED_TABLEGEN friendly with LLVM_EXTERNAL_CLANG_SOURCE_DIR

This is need because of clang-tblgen

Differential Revision: https://reviews.llvm.org/D26483

llvm-svn: 286560
GitOrigin-RevId: e8e98dcb74cd6d297c31c023bfacdf7f28cdaabc

cmake/modules/CrossCompile.cmake

diff --git a/cmake/modules/CrossCompile.cmake b/cmake/modules/CrossCompile.cmake
index 9c598a6..b0726eb 100644
--- a/cmake/modules/CrossCompile.cmake
+++ b/cmake/modules/CrossCompile.cmake
@@ -41,10 +41,15 @@
     if (buildtype)
       set(build_type_flags "-DCMAKE_BUILD_TYPE=${buildtype}")
     endif()
+	if (LLVM_EXTERNAL_CLANG_SOURCE_DIR)
+	  # Propagate LLVM_EXTERNAL_CLANG_SOURCE_DIR so that clang-tblgen can be built
+	  set(external_clang_dir "-DLLVM_EXTERNAL_CLANG_SOURCE_DIR=${LLVM_EXTERNAL_CLANG_SOURCE_DIR}")
+	endif()
     execute_process(COMMAND ${CMAKE_COMMAND} ${build_type_flags}
         -G "${CMAKE_GENERATOR}" -DLLVM_TARGETS_TO_BUILD=${LLVM_TARGETS_TO_BUILD}
         ${CROSS_TOOLCHAIN_FLAGS_${target_name}} ${CMAKE_SOURCE_DIR}
         -DLLVM_TARGET_IS_CROSSCOMPILE_HOST=TRUE
+        ${external_clang_dir}
       WORKING_DIRECTORY ${LLVM_${target_name}_BUILD} )
   endif(NOT IS_DIRECTORY ${LLVM_${target_name}_BUILD})