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

cross-compiling.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58950 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f634503b453c0d7bae96a2e6e62c94a6c0fdf4d9..ac7da6554d2f5133f46c7b92c5cd6f762003af67 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -114,12 +114,13 @@ set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} ${LLVM_LIBS} )
 set(LLVM_TABLEGEN "tblgen" CACHE
   STRING "Native TableGen executable.")
 
+add_subdirectory(utils/TableGen)
+
 if( CMAKE_CROSSCOMPILING )
+  # This adds a dependency on target `tblgen', so must go after utils/TableGen
   include( CrossCompileLLVM )
 endif( CMAKE_CROSSCOMPILING )
 
-add_subdirectory(utils/TableGen)
-
 add_custom_command(OUTPUT ${llvm_builded_incs_dir}/Intrinsics.gen
   COMMAND ${LLVM_TABLEGEN} -gen-intrinsic -I ${LLVM_MAIN_INCLUDE_DIR} ${LLVM_MAIN_INCLUDE_DIR}/llvm/Intrinsics.td -o ${llvm_builded_incs_dir}/Intrinsics.gen
   DEPENDS tblgen

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