CMake: Non-working code for auto-building the native tblgen util when

[oota-llvm.git] / cmake / modules / CrossCompileLLVM.cmake

diff --git a/cmake/modules/CrossCompileLLVM.cmake b/cmake/modules/CrossCompileLLVM.cmake
index 0377c056142834de7ccac6c8979fec1bcb0884a9..36ae306d01f2d353f72e747c74adacbcad1d61f2 100644 (file)
--- a/cmake/modules/CrossCompileLLVM.cmake
+++ b/cmake/modules/CrossCompileLLVM.cmake
@@ -1,6 +1,42 @@
-# TODO: Build a native tblgen when cross-compiling, if the user\r
-# didn't set LLVM_TABLEGEN. Then, remove this check:\r
-if( CMAKE_CROSSCOMPILING AND ${LLVM_TABLEGEN} STREQUAL "tblgen" )\r
+\r
+if( ${LLVM_TABLEGEN} STREQUAL "tblgen" )\r
+  # TODO: remove this when autobuilding the native tblgen works.\r
   message(FATAL_ERROR\r
     "Set LLVM_TABLEGEN to the full route to a native tblgen executable")\r
+\r
+  message(STATUS "Configuring native TableGen...")\r
+  set(CX_NATIVE_TG_DIR "${CMAKE_BINARY_DIR}/native")\r
+\r
+  execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${CX_NATIVE_TG_DIR}\r
+    RESULT_VARIABLE CX_NATIVE_TG_RV)\r
+  if( NOT CX_NATIVE_TG_RV EQUAL 0 )\r
+    message(FATAL_ERROR "Failed to create directory ${CX_NATIVE_TG_DIR}")\r
+  endif()\r
+\r
+  execute_process(\r
+    COMMAND ${CMAKE_COMMAND} -UMAKE_TOOLCHAIN_FILE -DCMAKE_BUILD_TYPE=Release ${CMAKE_SOURCE_DIR}\r
+    WORKING_DIRECTORY ${CX_NATIVE_TG_DIR}\r
+    RESULT_VARIABLE CX_NATIVE_TG_RV\r
+    ERROR_VARIABLE CX_NATIVE_TG_ERROR)\r
+  if( NOT CX_NATIVE_TG_RV EQUAL 0 )\r
+    message(FATAL_ERROR\r
+      "Error while configuring native TableGen:\n${CX_NATIVE_TG_ERROR}")\r
+  endif()\r
+\r
+  message(STATUS "Native TableGen configured.")\r
+\r
+  set(LLVM_TABLEGEN "${CX_NATIVE_TG_DIR}/bin/tblgen")\r
+\r
+  add_custom_command(OUTPUT ${LLVM_TABLEGEN}\r
+    COMMAND ${CMAKE_BUILD_TOOL} -C ${CX_NATIVE_TG_DIR}/utils/TableGen\r
+    COMMENT "Building native TableGen...")\r
+  add_custom_target(NativeTableGen DEPENDS ${LLVM_TABLEGEN})\r
+  add_dependencies(tblgen NativeTableGen)\r
+\r
+  # TODO: We should clean the native build when the `clean target\r
+  # is invoked. This doesn't work.\r
+#   add_custom_command(TARGET clean\r
+#     COMMAND ${CMAKE_BUILD_TOOL} -C ${CX_NATIVE_TG_DIR}/utils/TableGen clean\r
+#     POST_BUILD\r
+#     COMMENT "Cleaning native TableGen...")\r
 endif()\r