[libclc] Move CMake for prepare_builtins to a subdirectory (#148815)

This simply makes things better self-contained.

Author: frasercrmck

libclc/CMakeLists.txt

@@ -164,34 +164,14 @@ endif()
 
 list( SORT LIBCLC_TARGETS_TO_BUILD )
 
-# Construct LLVM version define
-set( LLVM_VERSION_DEFINE "-DHAVE_LLVM=0x${LLVM_VERSION_MAJOR}0${LLVM_VERSION_MINOR}" )
-
 # This needs to be set before any target that needs it
 # We need to use LLVM_INCLUDE_DIRS here, because if we are linking to an
 # llvm build directory, this includes $src/llvm/include which is where all the
 # headers are not $build/include/ which is what LLVM_INCLUDE_DIR is set to.
 include_directories( ${LLVM_INCLUDE_DIRS} )
 
-# Setup prepare_builtins tools
-set(LLVM_LINK_COMPONENTS
-  BitReader
-  BitWriter
-  Core
-  IRReader
-  Support
-)
-if( LIBCLC_STANDALONE_BUILD )
-  add_llvm_executable( prepare_builtins utils/prepare-builtins.cpp )
-  set( prepare_builtins_exe prepare_builtins )
-  set( prepare_builtins_target prepare_builtins )
-else()
-  add_llvm_utility( prepare_builtins utils/prepare-builtins.cpp )
-  setup_host_tool( prepare_builtins PREPARE_BUILTINS prepare_builtins_exe prepare_builtins_target )
-endif()
-target_compile_definitions( prepare_builtins PRIVATE ${LLVM_VERSION_DEFINE} )
-# These were not properly reported in early LLVM and we don't need them
-target_compile_options( prepare_builtins PRIVATE -fno-rtti -fno-exceptions )
+# Configure prepare_builtins
+add_subdirectory( utils )
 
 # Setup arch devices
 set( r600--_devices cedar cypress barts cayman )

libclc/utils/CMakeLists.txt

@@ -0,0 +1,24 @@
+# Construct LLVM version define
+set( LLVM_VERSION_DEFINE "-DHAVE_LLVM=0x${LLVM_VERSION_MAJOR}0${LLVM_VERSION_MINOR}" )
+
+# Setup prepare_builtins tools
+set( LLVM_LINK_COMPONENTS
+  BitReader
+  BitWriter
+  Core
+  IRReader
+  Support
+)
+
+if( LIBCLC_STANDALONE_BUILD )
+  add_llvm_executable( prepare_builtins prepare-builtins.cpp )
+  set( prepare_builtins_exe prepare_builtins )
+  set( prepare_builtins_target prepare_builtins )
+else()
+  add_llvm_utility( prepare_builtins prepare-builtins.cpp )
+  setup_host_tool( prepare_builtins PREPARE_BUILTINS prepare_builtins_exe prepare_builtins_target )
+endif()
+
+target_compile_definitions( prepare_builtins PRIVATE ${LLVM_VERSION_DEFINE} )
+# These were not properly reported in early LLVM and we don't need them
+target_compile_options( prepare_builtins PRIVATE -fno-rtti -fno-exceptions )