Reapply working parts of CMake cleanup.
This patch adds the working parts of r243503. The difference with this patch
is that it doesn't include the HandleLLVMOptions.cmake file.
llvm-svn: 243698
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 10ed6c361c1c0da0dcdae7366b9fb1809eb744f0
diff --git a/cmake/Modules/HandleOutOfTreeLLVM.cmake b/cmake/Modules/HandleOutOfTreeLLVM.cmake
new file mode 100644
index 0000000..1cd3cd7
--- /dev/null
+++ b/cmake/Modules/HandleOutOfTreeLLVM.cmake
@@ -0,0 +1,95 @@
+macro(find_llvm_parts)
+# Rely on llvm-config.
+ set(CONFIG_OUTPUT)
+ find_program(LLVM_CONFIG "llvm-config")
+ if(DEFINED LLVM_PATH)
+ set(LLVM_INCLUDE_DIR ${LLVM_INCLUDE_DIR} CACHE PATH "Path to llvm/include")
+ set(LLVM_PATH ${LLVM_PATH} CACHE PATH "Path to LLVM source tree")
+ set(LLVM_MAIN_SRC_DIR ${LLVM_PATH})
+ set(LLVM_CMAKE_PATH "${LLVM_PATH}/cmake/modules")
+ elseif(LLVM_CONFIG)
+ message(STATUS "Found LLVM_CONFIG as ${LLVM_CONFIG}")
+ set(CONFIG_COMMAND ${LLVM_CONFIG}
+ "--includedir"
+ "--prefix"
+ "--src-root")
+ execute_process(
+ COMMAND ${CONFIG_COMMAND}
+ RESULT_VARIABLE HAD_ERROR
+ OUTPUT_VARIABLE CONFIG_OUTPUT
+ )
+ if(NOT HAD_ERROR)
+ string(REGEX REPLACE
+ "[ \t]*[\r\n]+[ \t]*" ";"
+ CONFIG_OUTPUT ${CONFIG_OUTPUT})
+ else()
+ string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
+ message(STATUS "${CONFIG_COMMAND_STR}")
+ message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
+ endif()
+
+ list(GET CONFIG_OUTPUT 0 INCLUDE_DIR)
+ list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT)
+ list(GET CONFIG_OUTPUT 2 MAIN_SRC_DIR)
+
+ set(LLVM_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include")
+ set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
+ set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
+ set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/share/llvm/cmake")
+ else()
+ set(LLVM_FOUND OFF)
+ return()
+ endif()
+
+ if (NOT EXISTS ${LLVM_MAIN_SRC_DIR})
+ message(FATAL_ERROR "Not found: ${LLVM_MAIN_SRC_DIR}")
+ endif()
+
+ if(NOT EXISTS ${LLVM_CMAKE_PATH})
+ message(FATAL_ERROR "Not found: ${LLVM_CMAKE_PATH}")
+ endif()
+
+ list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
+ list(APPEND CMAKE_MODULE_PATH "${LLVM_MAIN_SRC_DIR}/cmake/modules")
+
+ set(LLVM_FOUND ON)
+endmacro(find_llvm_parts)
+
+
+if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+ set(LIBCXX_BUILT_STANDALONE 1)
+
+ find_llvm_parts()
+
+ # LLVM Options --------------------------------------------------------------
+ include(FindPythonInterp)
+ if( NOT PYTHONINTERP_FOUND )
+ message(WARNING "Failed to find python interpreter. "
+ "The libc++ test suite will be disabled.")
+ set(LLVM_INCLUDE_TESTS OFF)
+ endif()
+
+ if (NOT DEFINED LLVM_INCLUDE_TESTS)
+ set(LLVM_INCLUDE_TESTS ${LLVM_FOUND})
+ endif()
+
+ # Required LIT Configuration ------------------------------------------------
+ # Define the default arguments to use with 'lit', and an option for the user
+ # to override.
+ set(LIT_ARGS_DEFAULT "-sv --show-xfail --show-unsupported")
+ if (MSVC OR XCODE)
+ set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
+ endif()
+ set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
+
+ # Make sure we can use the console pool for recent cmake and ninja > 1.5
+ # Needed for add_lit_testsuite
+ if(CMAKE_VERSION VERSION_LESS 3.1.20141117)
+ set(cmake_3_2_USES_TERMINAL)
+ else()
+ set(cmake_3_2_USES_TERMINAL USES_TERMINAL)
+ endif()
+
+ # Add LLVM Functions --------------------------------------------------------
+ include(AddLLVM OPTIONAL)
+endif()