tools/boost_install/BoostConfig.cmake

   1 # Copyright 2019 Peter Dimov
   2 # Distributed under the Boost Software License, Version 1.0.
   3 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
   4
   5 # This CMake configuration file, installed as part of the Boost build
   6 # and installation procedure done by `b2 install`, provides support
   7 # for find_package(Boost).
   8 #
   9 # It's roughly, but not perfectly, compatible with the behavior
  10 # of find_package(Boost) as provided by FindBoost.cmake.
  11 #
  12 # A typical use might be
  13 #
  14 # find_package(Boost 1.70 REQUIRED COMPONENTS filesystem regex PATHS C:/Boost)
  15 #
  16 # On success, the above invocation would define the targets Boost::headers,
  17 # Boost::filesystem and Boost::regex. Boost::headers represents all
  18 # header-only libraries. An alias, Boost::boost, for Boost::headers is
  19 # provided for compatibility.
  20 #
  21 # Since Boost libraries can coexist in many variants - 32/64 bit,
  22 # static/dynamic runtime, debug/release, the following variables can be used
  23 # to control which variant is chosen:
  24 #
  25 # Boost_USE_DEBUG_LIBS:     When OFF, disables debug libraries.
  26 # Boost_USE_RELEASE_LIBS:   When OFF, disables release libraries.
  27 # Boost_USE_MULTITHREADED:  When ON, uses multithreaded Boost libraries.
  28 #                           When OFF, uses single-threaded libraries.
  29 #                           The default is to use either.
  30 # Boost_USE_STATIC_LIBS:    When ON, uses static Boost libraries; when OFF,
  31 #                           uses shared Boost libraries; when not set, uses
  32 #                           static on Windows, shared otherwise.
  33 # Boost_USE_STATIC_RUNTIME: When ON, uses Boost libraries linked against the
  34 #                           static runtime. The default is shared runtime.
  35 # Boost_USE_DEBUG_RUNTIME:  When ON, uses Boost libraries linked against the
  36 #                           debug runtime. When OFF, against the release
  37 #                           runtime. The default is to use either.
  38 # Boost_COMPILER:           The compiler that has been used to build Boost,
  39 #                           such as vc141, gcc7, clang37. The default is
  40 #                           determined from CMAKE_CXX_COMPILER_ID.
  41 # Boost_PYTHON_VERSION:     The version of Python against which Boost.Python
  42 #                           has been built; only required when more than one
  43 #                           Boost.Python library is present.
  44 #
  45 # The following variables control the verbosity of the output:
  46 #
  47 # Boost_VERBOSE:            Enable verbose output
  48 # Boost_DEBUG:              Enable debug (even more verbose) output
  49
  50 if(Boost_VERBOSE OR Boost_DEBUG)
  51
  52   message(STATUS "Found Boost ${Boost_VERSION} at ${Boost_DIR}")
  53
  54   # Output requested configuration (f.ex. "REQUIRED COMPONENTS filesystem")
  55
  56   if(Boost_FIND_QUIETLY)
  57     set(_BOOST_CONFIG "${_BOOST_CONFIG} QUIET")
  58   endif()
  59
  60   if(Boost_FIND_REQUIRED)
  61     set(_BOOST_CONFIG "${_BOOST_CONFIG} REQUIRED")
  62   endif()
  63
  64   foreach(__boost_comp IN LISTS Boost_FIND_COMPONENTS)
  65     if(${Boost_FIND_REQUIRED_${__boost_comp}})
  66       list(APPEND _BOOST_COMPONENTS ${__boost_comp})
  67     else()
  68       list(APPEND _BOOST_OPTIONAL_COMPONENTS ${__boost_comp})
  69     endif()
  70   endforeach()
  71
  72   if(_BOOST_COMPONENTS)
  73     set(_BOOST_CONFIG "${_BOOST_CONFIG} COMPONENTS ${_BOOST_COMPONENTS}")
  74   endif()
  75
  76   if(_BOOST_OPTIONAL_COMPONENTS)
  77     set(_BOOST_CONFIG "${_BOOST_CONFIG} OPTIONAL_COMPONENTS ${_BOOST_OPTIONAL_COMPONENTS}")
  78   endif()
  79
  80   if(_BOOST_CONFIG)
  81     message(STATUS "  Requested configuration:${_BOOST_CONFIG}")
  82   endif()
  83
  84   unset(_BOOST_CONFIG)
  85   unset(_BOOST_COMPONENTS)
  86   unset(_BOOST_OPTIONAL_COMPONENTS)
  87
  88 endif()
  89
  90 macro(boost_find_component comp req)
  91
  92   set(_BOOST_QUIET)
  93   if(Boost_FIND_QUIETLY)
  94     set(_BOOST_QUIET QUIET)
  95   endif()
  96
  97   set(_BOOST_REQUIRED)
  98   if(${req} AND Boost_FIND_REQUIRED)
  99     set(_BOOST_REQUIRED REQUIRED)
 100   endif()
 101
 102   if("${comp}" MATCHES "^(python|numpy|mpi_python)([1-9])([0-9])$")
 103
 104     # handle pythonXY and numpyXY versioned components for compatibility
 105
 106     set(Boost_PYTHON_VERSION "${CMAKE_MATCH_2}.${CMAKE_MATCH_3}")
 107     set(__boost_comp_nv "${CMAKE_MATCH_1}")
 108
 109   else()
 110
 111     set(__boost_comp_nv "${comp}")
 112
 113   endif()
 114
 115   get_filename_component(_BOOST_CMAKEDIR "${CMAKE_CURRENT_LIST_DIR}/../" ABSOLUTE)
 116
 117   if(Boost_DEBUG)
 118     message(STATUS "BoostConfig: find_package(boost_${__boost_comp_nv} ${Boost_VERSION} EXACT CONFIG ${_BOOST_REQUIRED} ${_BOOST_QUIET} HINTS ${_BOOST_CMAKEDIR})")
 119   endif()
 120   find_package(boost_${__boost_comp_nv} ${Boost_VERSION} EXACT CONFIG ${_BOOST_REQUIRED} ${_BOOST_QUIET} HINTS ${_BOOST_CMAKEDIR})
 121
 122   set(__boost_comp_found ${boost_${__boost_comp_nv}_FOUND})
 123
 124   # FindPackageHandleStandardArgs expects <package>_<component>_FOUND
 125   set(Boost_${comp}_FOUND ${__boost_comp_found})
 126
 127   # FindBoost sets Boost_<COMPONENT>_FOUND
 128   string(TOUPPER ${comp} _BOOST_COMP)
 129   set(Boost_${_BOOST_COMP}_FOUND ${__boost_comp_found})
 130
 131   # FindBoost compatibility variables: Boost_LIBRARIES, Boost_<C>_LIBRARY
 132   if(__boost_comp_found)
 133
 134     list(APPEND Boost_LIBRARIES Boost::${__boost_comp_nv})
 135     set(Boost_${_BOOST_COMP}_LIBRARY Boost::${__boost_comp_nv})
 136
 137     if(NOT "${comp}" STREQUAL "${__boost_comp_nv}" AND NOT TARGET Boost::${comp})
 138
 139       # Versioned target alias (f.ex. Boost::python27) for compatibility
 140       add_library(Boost::${comp} INTERFACE IMPORTED)
 141       set_property(TARGET Boost::${comp} APPEND PROPERTY INTERFACE_LINK_LIBRARIES Boost::${__boost_comp_nv})
 142
 143     endif()
 144
 145   endif()
 146
 147   unset(_BOOST_REQUIRED)
 148   unset(_BOOST_QUIET)
 149   unset(_BOOST_CMAKEDIR)
 150   unset(__boost_comp_nv)
 151   unset(__boost_comp_found)
 152   unset(_BOOST_COMP)
 153
 154 endmacro()
 155
 156 # Find boost_headers
 157
 158 boost_find_component(headers 1)
 159
 160 if(NOT boost_headers_FOUND)
 161
 162   set(Boost_FOUND 0)
 163   set(Boost_NOT_FOUND_MESSAGE "A required dependency, boost_headers, has not been found.")
 164
 165   return()
 166
 167 endif()
 168
 169 # Compatibility variables
 170
 171 set(Boost_MAJOR_VERSION ${Boost_VERSION_MAJOR})
 172 set(Boost_MINOR_VERSION ${Boost_VERSION_MINOR})
 173 set(Boost_SUBMINOR_VERSION ${Boost_VERSION_PATCH})
 174
 175 set(Boost_VERSION_STRING ${Boost_VERSION})
 176 set(Boost_VERSION_MACRO ${Boost_VERSION_MAJOR}0${Boost_VERSION_MINOR}0${Boost_VERSION_PATCH})
 177
 178 get_target_property(Boost_INCLUDE_DIRS Boost::headers INTERFACE_INCLUDE_DIRECTORIES)
 179 set(Boost_LIBRARIES "")
 180
 181 # Find components
 182
 183 foreach(__boost_comp IN LISTS Boost_FIND_COMPONENTS)
 184
 185   boost_find_component(${__boost_comp} ${Boost_FIND_REQUIRED_${__boost_comp}})
 186
 187 endforeach()
 188
 189 # Compatibility targets
 190
 191 if(NOT TARGET Boost::boost)
 192
 193   add_library(Boost::boost INTERFACE IMPORTED)
 194   set_property(TARGET Boost::boost APPEND PROPERTY INTERFACE_LINK_LIBRARIES Boost::headers)
 195
 196   # All Boost:: targets already disable autolink
 197   add_library(Boost::diagnostic_definitions INTERFACE IMPORTED)
 198   add_library(Boost::disable_autolinking INTERFACE IMPORTED)
 199   add_library(Boost::dynamic_linking INTERFACE IMPORTED)
 200
 201 endif()