[cmake] Remove support for invoking llvm-config.

I already removed the one invocation of llvm-config. This code is just dead.

rdar://26154980

Author: gottesmm

cmake/modules/SwiftSharedCMakeConfig.cmake

@@ -12,93 +12,6 @@ else()
   set(cmake_3_2_USES_TERMINAL USES_TERMINAL)
 endif()
 
-# Invokes llvm_config to get various configuration information needed to compile
-# programs which use llvm.
-#
-# Optional output parameters:
-#   [ENABLE_ASSERTIONS enableAssertions]
-#     If assertions are enabled.
-#
-#   [TOOLS_BINARY_DIR toolsBinaryDir]
-#     Path to llvm tools bin directory.
-#
-#   [LIBRARY_DIR toolsLibDir]
-#     Path to llvm tools lib directory.
-#
-#   [INCLUDE_DIR includeDir]
-#     Path to llvm include directory.
-#
-#   [OBJ_ROOT_DIR objRootDir]
-#     Path to llvm build tree.
-#
-#   [SOURCE_DIR srcDir]
-#     Path to llvm source tree.
-function(_swift_llvm_config_info)
-  # Parse the arguments we were given.
-  set(onevalueargs ENABLE_ASSERTIONS TOOLS_BINARY_DIR LIBRARY_DIR INCLUDE_DIR OBJ_ROOT_DIR SOURCE_DIR)
-  cmake_parse_arguments(
-    SWIFTLLVM
-    "" # options
-    "${onevalueargs}"
-    "" # multi-value args
-    ${ARGN})
-
-  find_program(LLVM_CONFIG "llvm-config")
-  if(NOT LLVM_CONFIG)
-    message(FATAL_ERROR "llvm-config not found -- ${LLVM_CONFIG}")
-  endif()
-
-  set(CONFIG_OUTPUT)
-  message(STATUS "Found LLVM_CONFIG as ${LLVM_CONFIG}")
-  set(CONFIG_COMMAND ${LLVM_CONFIG}
-      "--assertion-mode"
-      "--bindir"
-      "--libdir"
-      "--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 ${HAD_ERROR}")
-  endif()
-
-  list(GET CONFIG_OUTPUT 0 ENABLE_ASSERTIONS)
-  list(GET CONFIG_OUTPUT 1 TOOLS_BINARY_DIR)
-  list(GET CONFIG_OUTPUT 2 LIBRARY_DIR)
-  list(GET CONFIG_OUTPUT 3 INCLUDE_DIR)
-  list(GET CONFIG_OUTPUT 4 LLVM_OBJ_ROOT)
-  list(GET CONFIG_OUTPUT 5 MAIN_SRC_DIR)
-
-  if(SWIFTLLVM_ENABLE_ASSERTIONS)
-    set("${SWIFTLLVM_ENABLE_ASSERTIONS}" "${ENABLE_ASSERTIONS}" PARENT_SCOPE)
-  endif()
-  if(SWIFTLLVM_TOOLS_BINARY_DIR)
-    set("${SWIFTLLVM_TOOLS_BINARY_DIR}" "${TOOLS_BINARY_DIR}" PARENT_SCOPE)
-  endif()
-  if(SWIFTLLVM_LIBRARY_DIR)
-    set("${SWIFTLLVM_LIBRARY_DIR}" "${LIBRARY_DIR}" PARENT_SCOPE)
-  endif()
-  if(SWIFTLLVM_INCLUDE_DIR)
-    set("${SWIFTLLVM_INCLUDE_DIR}" "${INCLUDE_DIR}" PARENT_SCOPE)
-  endif()
-  if(SWIFTLLVM_OBJ_ROOT_DIR)
-    set("${SWIFTLLVM_OBJ_ROOT_DIR}" "${LLVM_OBJ_ROOT}" PARENT_SCOPE)
-  endif()
-  if(SWIFTLLVM_SOURCE_DIR)
-    set("${SWIFTLLVM_SOURCE_DIR}" "${MAIN_SRC_DIR}" PARENT_SCOPE)
-  endif()
-endfunction()
-
 # Common cmake project config for standalone builds.
 #
 # Parameters: