FindBinUtils: Revert "Use the compiler to get the path to compiler tools"

Revert commit b2fd479df5 (FindBinUtils: Use the compiler to get the path
to compiler tools, 2019-09-22, v3.16.0-rc1~51^2).  The compiler's answer
may incorrectly come from the `PATH`.  Another approach will be needed.

Fixes: #19934

Modules/CMakeFindBinUtils.cmake

@@ -57,44 +57,6 @@ endfunction()
 __resolve_tool_path(CMAKE_LINKER "${_CMAKE_TOOLCHAIN_LOCATION}" "Default Linker")
 __resolve_tool_path(CMAKE_MT     "${_CMAKE_TOOLCHAIN_LOCATION}" "Default Manifest Tool")
 
-function(__get_compiler_component CMAKE_TOOL NAME)
-  get_property(_CMAKE_TOOL_CACHED CACHE ${CMAKE_TOOL} PROPERTY TYPE)
-  # If CMAKE_TOOL is present in the CMake Cache, return
-  if(_CMAKE_TOOL_CACHED)
-    return()
-  endif()
-
-  cmake_parse_arguments(_COMPILER_COMP_ARGS "" "DOC" "HINTS;NAMES" ${ARGN})
-
-  set(_LOCATION_FROM_COMPILER )
-  set(_NAME_FROM_COMPILER )
-
-  if (NOT DEFINED ${CMAKE_TOOL})
-    if("x${CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_ID}" STREQUAL "xGNU" OR
-       "x${CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_ID}" STREQUAL "xClang")
-      execute_process(
-        COMMAND ${CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER} -print-prog-name=${NAME}
-        RESULT_VARIABLE _CMAKE_TOOL_PROG_NAME_RESULT
-        OUTPUT_VARIABLE _CMAKE_TOOL_PROG_NAME_OUTPUT
-        OUTPUT_STRIP_TRAILING_WHITESPACE
-      )
-      if (_CMAKE_TOOL_PROG_NAME_RESULT STREQUAL "0" AND IS_ABSOLUTE "${_CMAKE_TOOL_PROG_NAME_OUTPUT}")
-        get_filename_component(_LOCATION_FROM_COMPILER "${_CMAKE_TOOL_PROG_NAME_OUTPUT}" DIRECTORY)
-        get_filename_component(_NAME_FROM_COMPILER "${_CMAKE_TOOL_PROG_NAME_OUTPUT}" NAME)
-      endif()
-    endif()
-  endif()
-
-  if (NOT _COMPILER_COMP_ARGS_DOC)
-    set(_COMPILER_COMP_ARGS_DOC "Path to ${NAME} program")
-  endif()
-  find_program(${CMAKE_TOOL}
-    NAMES ${_NAME_FROM_COMPILER} ${_COMPILER_COMP_ARGS_NAMES}
-    HINTS ${_LOCATION_FROM_COMPILER} ${_COMPILER_COMP_ARGS_HINTS}
-    DOC "${_COMPILER_COMP_ARGS_DOC}"
-  )
-endfunction()
-
 set(_CMAKE_TOOL_VARS "")
 
 # if it's the MS C/CXX compiler, search for link
@@ -139,38 +101,28 @@ else()
     set(_CMAKE_ADDITIONAL_ADDR2LINE_NAMES "llvm-addr2line")
   endif()
 
-  __get_compiler_component(CMAKE_AR ar NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ar${_CMAKE_TOOLCHAIN_SUFFIX} ${_CMAKE_ADDITIONAL_AR_NAMES}
-                                       HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_AR NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ar${_CMAKE_TOOLCHAIN_SUFFIX} ${_CMAKE_ADDITIONAL_AR_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
 
-  __get_compiler_component(CMAKE_RANLIB ranlib NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ranlib ${_CMAKE_ADDITIONAL_RANLIB_NAMES}
-                                               HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_RANLIB NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ranlib ${_CMAKE_ADDITIONAL_RANLIB_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
   if(NOT CMAKE_RANLIB)
     set(CMAKE_RANLIB : CACHE INTERNAL "noop for ranlib")
   endif()
 
 
-  __get_compiler_component(CMAKE_STRIP strip NAMES ${_CMAKE_TOOLCHAIN_PREFIX}strip${_CMAKE_TOOLCHAIN_SUFFIX} ${_CMAKE_ADDITIONAL_STRIP_NAMES}
-                                             HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
-  __get_compiler_component(CMAKE_LINKER ld NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ld ${_CMAKE_ADDITIONAL_LINKER_NAMES}
-                                           HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
-  __get_compiler_component(CMAKE_NM nm NAMES ${_CMAKE_TOOLCHAIN_PREFIX}nm ${_CMAKE_ADDITIONAL_NM_NAMES}
-                                       HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
-  __get_compiler_component(CMAKE_OBJDUMP objdump NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objdump ${_CMAKE_ADDITIONAL_OBJDUMP_NAMES}
-                                       HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
-  __get_compiler_component(CMAKE_OBJCOPY objcopy NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objcopy ${_CMAKE_ADDITIONAL_OBJCOPY_NAMES}
-                                       HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
-  __get_compiler_component(CMAKE_READELF readelf NAMES ${_CMAKE_TOOLCHAIN_PREFIX}readelf ${_CMAKE_ADDITIONAL_READELF_NAMES}
-                                       HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
-  __get_compiler_component(CMAKE_DLLTOOL dlltool NAMES ${_CMAKE_TOOLCHAIN_PREFIX}dlltool ${_CMAKE_ADDITIONAL_DLLTOOL_NAMES}
-                                       HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
-  __get_compiler_component(CMAKE_ADDR2LINE addr2line NAMES ${_CMAKE_TOOLCHAIN_PREFIX}addr2line ${_CMAKE_ADDITIONAL_ADDR2LINE_NAMES}
-                                       HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_STRIP NAMES ${_CMAKE_TOOLCHAIN_PREFIX}strip${_CMAKE_TOOLCHAIN_SUFFIX} ${_CMAKE_ADDITIONAL_STRIP_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_LINKER NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ld ${_CMAKE_ADDITIONAL_LINKER_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_NM NAMES ${_CMAKE_TOOLCHAIN_PREFIX}nm ${_CMAKE_ADDITIONAL_NM_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_OBJDUMP NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objdump ${_CMAKE_ADDITIONAL_OBJDUMP_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_OBJCOPY NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objcopy ${_CMAKE_ADDITIONAL_OBJCOPY_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_READELF NAMES ${_CMAKE_TOOLCHAIN_PREFIX}readelf ${_CMAKE_ADDITIONAL_READELF_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_DLLTOOL NAMES ${_CMAKE_TOOLCHAIN_PREFIX}dlltool ${_CMAKE_ADDITIONAL_DLLTOOL_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_ADDR2LINE NAMES ${_CMAKE_TOOLCHAIN_PREFIX}addr2line ${_CMAKE_ADDITIONAL_ADDR2LINE_NAMES} HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
 
   list(APPEND _CMAKE_TOOL_VARS AR RANLIB STRIP LINKER NM OBJDUMP OBJCOPY READELF DLLTOOL ADDR2LINE)
 endif()
 
 if(CMAKE_PLATFORM_HAS_INSTALLNAME)
-  __get_compiler_component(CMAKE_INSTALL_NAME_TOOL install_name_tool NAMES ${_CMAKE_TOOLCHAIN_PREFIX}install_name_tool HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
+  find_program(CMAKE_INSTALL_NAME_TOOL NAMES ${_CMAKE_TOOLCHAIN_PREFIX}install_name_tool HINTS ${_CMAKE_TOOLCHAIN_LOCATION})
 
   if(NOT CMAKE_INSTALL_NAME_TOOL)
     message(FATAL_ERROR "Could not find install_name_tool, please check your installation.")

Modules/Compiler/GNU-FindBinUtils.cmake

@@ -15,27 +15,21 @@ string(REGEX MATCH "^([0-9]+\\.[0-9]+)" __version_x_y
 get_filename_component(__gcc_hints "${CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER}" DIRECTORY)
 
 # http://manpages.ubuntu.com/manpages/wily/en/man1/gcc-ar.1.html
-__get_compiler_component(
-    CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_AR gcc-ar
-    HINTS
-      ${__gcc_hints}
-    NAMES
-      "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar-${__version_x_y}"
-      "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar-${__version_x}"
-      "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar"
+find_program(CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_AR NAMES
+    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar-${__version_x_y}"
+    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar-${__version_x}"
+    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar${_CMAKE_COMPILER_SUFFIX}"
+    HINTS ${__gcc_hints}
     DOC "A wrapper around 'ar' adding the appropriate '--plugin' option for the GCC compiler"
 )
 mark_as_advanced(CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_AR)
 
 # http://manpages.ubuntu.com/manpages/wily/en/man1/gcc-ranlib.1.html
-__get_compiler_component(
-    CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_RANLIB gcc-ranlib
-    HINTS
-      ${__gcc_hints}
-    NAMES
-      "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib-${__version_x_y}"
-      "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib-${__version_x}"
-      "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib"
+find_program(CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_RANLIB NAMES
+    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib-${__version_x_y}"
+    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib-${__version_x}"
+    "${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib${_CMAKE_COMPILER_SUFFIX}"
+    HINTS ${__gcc_hints}
     DOC "A wrapper around 'ranlib' adding the appropriate '--plugin' option for the GCC compiler"
 )
 mark_as_advanced(CMAKE_${_CMAKE_PROCESSING_LANGUAGE}_COMPILER_RANLIB)