Revert r243503 "[libcxx] Cleanup CMake configuration and integrate with LLVM"

This caused clang-format to stop linking on Mac; see PR24306.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@243550 91177308-0d34-0410-b5e6-96231b3b80d8

cmake/Modules/HandleLibcxxFlags.cmake

@@ -1,147 +0,0 @@
-# HandleLibcxxFlags - A set of macros used to setup the flags used to compile
-# and link libc++. These macros add flags to the following CMake variables.
-# - LIBCXX_COMPILE_FLAGS: flags used to compile libc++
-# - LIBCXX_LINK_FLAGS: flags used to link libc++
-# - LIBCXX_LIBRARIES: libraries to link libc++ to.
-
-include(CheckCXXCompilerFlag)
-
-unset(add_flag_if_supported)
-
-# Mangle the name of a compiler flag into a valid CMake identifier.
-# Ex: --std=c++11 -> STD_EQ_CXX11
-macro(mangle_name str output)
-  string(STRIP "${str}" strippedStr)
-  string(REGEX REPLACE "^/" "" strippedStr "${strippedStr}")
-  string(REGEX REPLACE "^-+" "" strippedStr "${strippedStr}")
-  string(REGEX REPLACE "-+$" "" strippedStr "${strippedStr}")
-  string(REPLACE "-" "_" strippedStr "${strippedStr}")
-  string(REPLACE "=" "_EQ_" strippedStr "${strippedStr}")
-  string(REPLACE "+" "X" strippedStr "${strippedStr}")
-  string(TOUPPER "${strippedStr}" ${output})
-endmacro()
-
-# Remove a list of flags from all CMake variables that affect compile flags.
-# This can be used to remove unwanted flags specified on the command line
-# or added in other parts of LLVM's cmake configuration.
-macro(remove_flags)
-  foreach(var ${ARGN})
-    string(REPLACE "${var}" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-    string(REPLACE "${var}" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-    string(REPLACE "${var}" "" CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
-    string(REPLACE "${var}" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
-    string(REPLACE "${var}" "" CMAKE_SHARED_MODULE_FLAGS "${CMAKE_SHARED_MODULE_FLAGS}")
-    remove_definitions(${var})
-  endforeach()
-endmacro(remove_flags)
-
-# Add a macro definition if condition is true.
-macro(define_if condition def)
-  if (${condition})
-    add_definitions(${def})
-  endif()
-endmacro()
-
-# Add a macro definition if condition is not true.
-macro(define_if_not condition def)
-  if (NOT ${condition})
-    add_definitions(${def})
-  endif()
-endmacro()
-
-# Add a specified list of flags to both 'LIBCXX_COMPILE_FLAGS' and
-# 'LIBCXX_LINK_FLAGS'.
-macro(add_flags)
-  foreach(value ${ARGN})
-    list(APPEND LIBCXX_COMPILE_FLAGS ${value})
-    list(APPEND LIBCXX_LINK_FLAGS ${value})
-  endforeach()
-endmacro()
-
-# If the specified 'condition' is true then add a list of flags to both
-# 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'.
-macro(add_flags_if condition)
-  if (${condition})
-    add_flags(${ARGN})
-  endif()
-endmacro()
-
-# Add each flag in the list to LIBCXX_COMPILE_FLAGS and LIBCXX_LINK_FLAGS
-# if that flag is supported by the current compiler.
-macro(add_flags_if_supported)
-  foreach(flag ${ARGN})
-      mangle_name("${flag}" flagname)
-      check_cxx_compiler_flag("${flag}" "LIBCXX_SUPPORTS_${flagname}_FLAG")
-      add_flags_if(LIBCXX_SUPPORTS_${flagname}_FLAG ${flag})
-  endforeach()
-endmacro()
-
-# Add a list of flags to 'LIBCXX_COMPILE_FLAGS'.
-macro(add_compile_flags)
-  foreach(f ${ARGN})
-    list(APPEND LIBCXX_COMPILE_FLAGS ${f})
-  endforeach()
-endmacro()
-
-# If 'condition' is true then add the specified list of flags to
-# 'LIBCXX_COMPILE_FLAGS'
-macro(add_compile_flags_if condition)
-  if (${condition})
-    add_compile_flags(${ARGN})
-  endif()
-endmacro()
-
-# For each specified flag, add that flag to 'LIBCXX_COMPILE_FLAGS' if the
-# flag is supported by the C++ compiler.
-macro(add_compile_flags_if_supported)
-  foreach(flag ${ARGN})
-      mangle_name("${flag}" flagname)
-      check_cxx_compiler_flag("-Werror ${flag}" "LIBCXX_SUPPORTS_${flagname}_FLAG")
-      add_compile_flags_if(LIBCXX_SUPPORTS_${flagname}_FLAG ${flag})
-  endforeach()
-endmacro()
-
-# Add a list of flags to 'LIBCXX_LINK_FLAGS'.
-macro(add_link_flags)
-  foreach(f ${ARGN})
-    list(APPEND LIBCXX_LINK_FLAGS ${f})
-  endforeach()
-endmacro()
-
-# If 'condition' is true then add the specified list of flags to
-# 'LIBCXX_LINK_FLAGS'
-macro(add_link_flags_if condition)
-  if (${condition})
-    add_link_flags(${ARGN})
-  endif()
-endmacro()
-
-# For each specified flag, add that flag to 'LIBCXX_LINK_FLAGS' if the
-# flag is supported by the C++ compiler.
-macro(add_link_flags_if_supported)
-  foreach(flag ${ARGN})
-    mangle_name("${flag}" flagname)
-    check_cxx_compiler_flag("${flag}" "LIBCXX_SUPPORTS_${flagname}_FLAG")
-    add_link_flags_if(LIBCXX_SUPPORTS_${flagname}_FLAG ${flag})
-  endforeach()
-endmacro()
-
-# Add a list of libraries or link flags to 'LIBCXX_LIBRARIES'.
-macro(add_library_flags)
-  foreach(lib ${ARGN})
-    list(APPEND LIBCXX_LIBRARIES ${lib})
-  endforeach()
-endmacro()
-
-# if 'condition' is true then add the specified list of libraries and flags
-# to 'LIBCXX_LIBRARIES'.
-macro(add_library_flags_if condition)
-  if(${condition})
-    add_library_flags(${ARGN})
-  endif()
-endmacro()
-
-# Turn a comma separated CMake list into a space separated string.
-macro(split_list listname)
-  string(REPLACE ";" " " ${listname} "${${listname}}")
-endmacro()