[runtimes] Create Tests.cmake if it does not exist

This is necessary so that Tests.cmake is always included in the
generated build file and any changes made by subbuilds are detected
without needing to rerun CMake.

This is equivalent to an earlier version of D121647.

Differential Revision: https://reviews.llvm.org/D121647

diff --git a/llvm/runtimes/CMakeLists.txt b/llvm/runtimes/CMakeLists.txt
index 9ee124a5616ccaeaaaedbdd4896a58abfa6fb8d4..f4c486924fb5bddf89e35b43cb21a11daadd0b1f 100644 (file)
--- a/llvm/runtimes/CMakeLists.txt
+++ b/llvm/runtimes/CMakeLists.txt
@@ -220,7 +220,11 @@ function(runtime_default_target)
   endforeach()
 
   if(LLVM_INCLUDE_TESTS)
-    include(${LLVM_BINARY_DIR}/runtimes/Tests.cmake OPTIONAL)
+    if (NOT EXISTS ${LLVM_BINARY_DIR}/runtimes/Tests.cmake)
+      # This file will be later replaced by the runtimes subbuild.
+      file(TOUCH ${LLVM_BINARY_DIR}/runtimes/Tests.cmake)
+    endif()
+    include(${LLVM_BINARY_DIR}/runtimes/Tests.cmake)
     set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${LLVM_BINARY_DIR}/runtimes/Tests.cmake)
     set_property(GLOBAL APPEND PROPERTY LLVM_LIT_TESTSUITES ${SUB_LIT_TESTSUITES})
     set_property(GLOBAL APPEND PROPERTY LLVM_LIT_PARAMS ${SUB_LIT_PARAMS})
@@ -302,7 +306,11 @@ function(runtime_register_target name target)
   endforeach()
 
   if(LLVM_INCLUDE_TESTS)
-    include(${LLVM_BINARY_DIR}/runtimes/${name}/Tests.cmake OPTIONAL)
+    if (NOT EXISTS ${LLVM_BINARY_DIR}/runtimes/Tests.cmake)
+      # This file will be later replaced by the runtimes subbuild.
+      file(TOUCH ${LLVM_BINARY_DIR}/runtimes/Tests.cmake)
+    endif()
+    include(${LLVM_BINARY_DIR}/runtimes/Tests.cmake)
     set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${LLVM_BINARY_DIR}/runtimes/${name}/Tests.cmake)
     set_property(GLOBAL APPEND PROPERTY LLVM_LIT_TESTSUITES ${SUB_LIT_TESTSUITES})
     set_property(GLOBAL APPEND PROPERTY LLVM_LIT_PARAMS ${SUB_LIT_PARAMS})