summaryrefslogtreecommitdiffstats
path: root/Modules/CMakeExpandImportedTargets.cmake
blob: ad065f05086fd463cb4f4f5febd96a091915641e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#.rst:
# CMakeExpandImportedTargets
# --------------------------
#
# Deprecated.  Do not use.
#
# This module was once needed to expand imported targets to the underlying
# libraries they reference on disk for use with the :command:`try_compile`
# and :command:`try_run` commands.  These commands now support imported
# libraries in their ``LINK_LIBRARIES`` options (since CMake 2.8.11
# for :command:`try_compile` and since CMake 3.2 for :command:`try_run`).
#
# This module does not support the policy :policy:`CMP0022` ``NEW``
# behavior or use of the :prop_tgt:`INTERFACE_LINK_LIBRARIES` property
# because :manual:`generator expressions <cmake-generator-expressions(7)>`
# cannot be evaluated during configuration.
#
# ::
#
#  CMAKE_EXPAND_IMPORTED_TARGETS(<var> LIBRARIES lib1 lib2...libN
#                                [CONFIGURATION <config>])
#
# CMAKE_EXPAND_IMPORTED_TARGETS() takes a list of libraries and replaces
# all imported targets contained in this list with their actual file
# paths of the referenced libraries on disk, including the libraries
# from their link interfaces.  If a CONFIGURATION is given, it uses the
# respective configuration of the imported targets if it exists.  If no
# CONFIGURATION is given, it uses the first configuration from
# ${CMAKE_CONFIGURATION_TYPES} if set, otherwise ${CMAKE_BUILD_TYPE}.
#
# ::
#
#     cmake_expand_imported_targets(expandedLibs
#       LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}
#       CONFIGURATION "${CMAKE_TRY_COMPILE_CONFIGURATION}" )

function(CMAKE_EXPAND_IMPORTED_TARGETS _RESULT )

   set(options )
   set(oneValueArgs CONFIGURATION )
   set(multiValueArgs LIBRARIES )

   cmake_parse_arguments(CEIT "${options}" "${oneValueArgs}" "${multiValueArgs}"  ${ARGN})

   if(CEIT_UNPARSED_ARGUMENTS)
      message(FATAL_ERROR "Unknown keywords given to CMAKE_EXPAND_IMPORTED_TARGETS(): \"${CEIT_UNPARSED_ARGUMENTS}\"")
   endif()

   if(NOT CEIT_CONFIGURATION)
      if(CMAKE_CONFIGURATION_TYPES)
         list(GET CMAKE_CONFIGURATION_TYPES 0 CEIT_CONFIGURATION)
      else()
         set(CEIT_CONFIGURATION ${CMAKE_BUILD_TYPE})
      endif()
   endif()

   # handle imported library targets

   set(_CCSR_REQ_LIBS ${CEIT_LIBRARIES})

   set(_CHECK_FOR_IMPORTED_TARGETS TRUE)
   set(_CCSR_LOOP_COUNTER 0)
   while(_CHECK_FOR_IMPORTED_TARGETS)
      math(EXPR _CCSR_LOOP_COUNTER "${_CCSR_LOOP_COUNTER} + 1 ")
      set(_CCSR_NEW_REQ_LIBS )
      set(_CHECK_FOR_IMPORTED_TARGETS FALSE)
      foreach(_CURRENT_LIB ${_CCSR_REQ_LIBS})
         if(TARGET "${_CURRENT_LIB}")
           get_target_property(_importedConfigs "${_CURRENT_LIB}" IMPORTED_CONFIGURATIONS)
         else()
           set(_importedConfigs "")
         endif()
         if (_importedConfigs)
#            message(STATUS "Detected imported target ${_CURRENT_LIB}")
            # Ok, so this is an imported target.
            # First we get the imported configurations.
            # Then we get the location of the actual library on disk of the first configuration.
            # then we'll get its link interface libraries property,
            # iterate through it and replace all imported targets we find there
            # with there actual location.

            # guard against infinite loop: abort after 100 iterations ( 100 is arbitrary chosen)
            if ("${_CCSR_LOOP_COUNTER}" LESS 100)
               set(_CHECK_FOR_IMPORTED_TARGETS TRUE)
#                else ()
#                   message(STATUS "********* aborting loop, counter : ${_CCSR_LOOP_COUNTER}")
            endif ()

            # if one of the imported configurations equals ${CMAKE_TRY_COMPILE_CONFIGURATION},
            # use it, otherwise simply use the first one:
            list(FIND _importedConfigs "${CEIT_CONFIGURATION}" _configIndexToUse)
            if("${_configIndexToUse}" EQUAL -1)
              set(_configIndexToUse 0)
            endif()
            list(GET _importedConfigs ${_configIndexToUse} _importedConfigToUse)

            get_target_property(_importedLocation "${_CURRENT_LIB}" IMPORTED_LOCATION_${_importedConfigToUse})
            get_target_property(_linkInterfaceLibs "${_CURRENT_LIB}" IMPORTED_LINK_INTERFACE_LIBRARIES_${_importedConfigToUse} )

            list(APPEND _CCSR_NEW_REQ_LIBS  "${_importedLocation}")
#            message(STATUS "Appending lib ${_CURRENT_LIB} as ${_importedLocation}")
            if(_linkInterfaceLibs)
               foreach(_currentLinkInterfaceLib ${_linkInterfaceLibs})
#                  message(STATUS "Appending link interface lib ${_currentLinkInterfaceLib}")
                  if(_currentLinkInterfaceLib)
                     list(APPEND _CCSR_NEW_REQ_LIBS "${_currentLinkInterfaceLib}" )
                  endif()
               endforeach()
            endif()
         else()
            # "Normal" libraries are just used as they are.
            list(APPEND _CCSR_NEW_REQ_LIBS "${_CURRENT_LIB}" )
#            message(STATUS "Appending lib directly: ${_CURRENT_LIB}")
         endif()
      endforeach()

      set(_CCSR_REQ_LIBS ${_CCSR_NEW_REQ_LIBS} )
   endwhile()

   # Finally we iterate once more over all libraries. This loop only removes
   # all remaining imported target names (there shouldn't be any left anyway).
   set(_CCSR_NEW_REQ_LIBS )
   foreach(_CURRENT_LIB ${_CCSR_REQ_LIBS})
      if(TARGET "${_CURRENT_LIB}")
        get_target_property(_importedConfigs "${_CURRENT_LIB}" IMPORTED_CONFIGURATIONS)
      else()
        set(_importedConfigs "")
      endif()
      if (NOT _importedConfigs)
         list(APPEND _CCSR_NEW_REQ_LIBS "${_CURRENT_LIB}" )
#         message(STATUS "final: appending ${_CURRENT_LIB}")
      else ()
#             message(STATUS "final: skipping ${_CURRENT_LIB}")
      endif ()
   endforeach()
#   message(STATUS "setting -${_RESULT}- to -${_CCSR_NEW_REQ_LIBS}-")
   set(${_RESULT} "${_CCSR_NEW_REQ_LIBS}" PARENT_SCOPE)

endfunction()