2 #=============================================================================
3 # Copyright 2004-2012 Kitware, Inc.
5 # Distributed under the OSI-approved BSD License (the "License");
6 # see accompanying file Copyright.txt for details.
8 # This software is distributed WITHOUT ANY WARRANTY; without even the
9 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
10 # See the License for more information.
11 #=============================================================================
12 # (To distribute this file outside of CMake, substitute the full
13 # License text for the above reference.)
15 macro(_cmake_find_compiler lang)
16 # Use already-enabled languages for reference.
17 get_property(_languages GLOBAL PROPERTY ENABLED_LANGUAGES)
18 list(REMOVE_ITEM _languages "${lang}")
20 if(CMAKE_${lang}_COMPILER_INIT)
21 # Search only for the specified compiler.
22 set(CMAKE_${lang}_COMPILER_LIST "${CMAKE_${lang}_COMPILER_INIT}")
24 # Re-order the compiler list with preferred vendors first.
25 set(_${lang}_COMPILER_LIST "${CMAKE_${lang}_COMPILER_LIST}")
26 set(CMAKE_${lang}_COMPILER_LIST "")
27 # Prefer vendors of compilers from reference languages.
28 foreach(l ${_languages})
29 list(APPEND CMAKE_${lang}_COMPILER_LIST
30 ${_${lang}_COMPILER_NAMES_${CMAKE_${l}_COMPILER_ID}})
32 # Prefer vendors based on the platform.
33 list(APPEND CMAKE_${lang}_COMPILER_LIST ${CMAKE_${lang}_COMPILER_NAMES})
34 # Append the rest of the list and remove duplicates.
35 list(APPEND CMAKE_${lang}_COMPILER_LIST ${_${lang}_COMPILER_LIST})
36 unset(_${lang}_COMPILER_LIST)
37 list(REMOVE_DUPLICATES CMAKE_${lang}_COMPILER_LIST)
38 if(CMAKE_${lang}_COMPILER_EXCLUDE)
39 list(REMOVE_ITEM CMAKE_${lang}_COMPILER_LIST
40 ${CMAKE_${lang}_COMPILER_EXCLUDE})
44 # Look for directories containing compilers of reference languages.
45 set(_${lang}_COMPILER_HINTS)
46 foreach(l ${_languages})
47 if(CMAKE_${l}_COMPILER AND IS_ABSOLUTE "${CMAKE_${l}_COMPILER}")
48 get_filename_component(_hint "${CMAKE_${l}_COMPILER}" PATH)
49 if(IS_DIRECTORY "${_hint}")
50 list(APPEND _${lang}_COMPILER_HINTS "${_hint}")
57 if(_${lang}_COMPILER_HINTS)
58 # Prefer directories containing compilers of reference languages.
59 list(REMOVE_DUPLICATES _${lang}_COMPILER_HINTS)
60 find_program(CMAKE_${lang}_COMPILER
61 NAMES ${CMAKE_${lang}_COMPILER_LIST}
62 PATHS ${_${lang}_COMPILER_HINTS}
64 DOC "${lang} compiler")
66 find_program(CMAKE_${lang}_COMPILER NAMES ${CMAKE_${lang}_COMPILER_LIST} DOC "${lang} compiler")
67 if(CMAKE_${lang}_COMPILER_INIT AND NOT CMAKE_${lang}_COMPILER)
68 set(CMAKE_${lang}_COMPILER "${CMAKE_${lang}_COMPILER_INIT}" CACHE FILEPATH "${lang} compiler" FORCE)
70 unset(_${lang}_COMPILER_HINTS)