[CMake] Add lto subdirectory explicitly.

This is required because ExternalProject_Add requires all targets specified in the DEPENDS argument must exist before calling ExternalProject_Add.

I have a follow-up patch to clang that enables using the just-built libLTO in bootstrap builds, so we need to be able to add the LTO target as a dependency in clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247316 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 203169350c53ab60f0871461893fae94ea16fc7d..aca4350fcb286d07c7f141c99ba8d46469641d96 100644 (file)
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -30,6 +30,10 @@ if(CYGWIN OR NOT LLVM_ENABLE_PIC)
   set(LLVM_TOOL_LLVM_LTO_BUILD Off)
 endif()
 
   set(LLVM_TOOL_LLVM_LTO_BUILD Off)
 endif()
 

+# Add LTO before clang, ExternalProject requires targets specified in DEPENDS
+# to exist before the call to ExternalProject_Add
+add_llvm_tool_subdirectory(lto)
+

 # Projects supported via LLVM_EXTERNAL_*_SOURCE_DIR need to be explicitly
 # specified.
 add_llvm_external_project(clang)
 # Projects supported via LLVM_EXTERNAL_*_SOURCE_DIR need to be explicitly
 # specified.
 add_llvm_external_project(clang)