Modules/CMakeCXXInformation.cmake

   1 # This file sets the basic flags for the C++ language in CMake.
   2 # It also loads the available platform file for the system-compiler
   3 # if it exists.
   4
   5
   6 GET_FILENAME_COMPONENT(CMAKE_BASE_NAME ${CMAKE_CXX_COMPILER} NAME_WE)
   7 # since the gnu compiler has several names force g++
   8 IF(CMAKE_COMPILER_IS_GNUCXX)
   9   SET(CMAKE_BASE_NAME g++)
  10 ENDIF(CMAKE_COMPILER_IS_GNUCXX)
  11 SET(CMAKE_SYSTEM_AND_CXX_COMPILER_INFO_FILE
  12   ${CMAKE_ROOT}/Modules/Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}.cmake)
  13 INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL)
  14
  15 # for most systems a module is the same as a shared library
  16 # so unless the variable CMAKE_MODULE_EXISTS is set just
  17 # copy the values from the LIBRARY variables
  18 IF(NOT CMAKE_MODULE_EXISTS)
  19   SET(CMAKE_SHARED_MODULE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
  20 ENDIF(NOT CMAKE_MODULE_EXISTS)
  21 # Create a set of shared library variable specific to C++
  22 # For 90% of the systems, these are the same flags as the C versions
  23 # so if these are not set just copy the flags from the c version
  24 IF(NOT CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS)
  25   SET(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS})
  26 ENDIF(NOT CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS)
  27
  28 IF(NOT CMAKE_SHARED_LIBRARY_CXX_FLAGS)
  29   SET(CMAKE_SHARED_LIBRARY_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_C_FLAGS})
  30 ENDIF(NOT CMAKE_SHARED_LIBRARY_CXX_FLAGS)
  31
  32 IF(NOT CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)
  33   SET(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS})
  34 ENDIF(NOT CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)
  35
  36 IF(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG)
  37   SET(CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG})
  38 ENDIF(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG)
  39
  40 IF(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP)
  41   SET(CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP})
  42 ENDIF(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP)
  43
  44 IF(NOT CMAKE_INCLUDE_FLAG_CXX)
  45   SET(CMAKE_INCLUDE_FLAG_CXX ${CMAKE_INCLUDE_FLAG_C})
  46 ENDIF(NOT CMAKE_INCLUDE_FLAG_CXX)
  47
  48 IF(NOT CMAKE_INCLUDE_FLAG_SEP_CXX)
  49   SET(CMAKE_INCLUDE_FLAG_SEP_CXX ${CMAKE_INCLUDE_FLAG_SEP_C})
  50 ENDIF(NOT CMAKE_INCLUDE_FLAG_SEP_CXX)
  51
  52 # repeat for modules
  53 IF(NOT CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS)
  54   SET(CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS ${CMAKE_SHARED_MODULE_CREATE_C_FLAGS})
  55 ENDIF(NOT CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS)
  56
  57 IF(NOT CMAKE_SHARED_MODULE_CXX_FLAGS)
  58   SET(CMAKE_SHARED_MODULE_CXX_FLAGS ${CMAKE_SHARED_MODULE_C_FLAGS})
  59 ENDIF(NOT CMAKE_SHARED_MODULE_CXX_FLAGS)
  60
  61 IF(NOT CMAKE_SHARED_MODULE_LINK_CXX_FLAGS)
  62   SET(CMAKE_SHARED_MODULE_LINK_CXX_FLAGS ${CMAKE_SHARED_MODULE_LINK_C_FLAGS})
  63 ENDIF(NOT CMAKE_SHARED_MODULE_LINK_CXX_FLAGS)
  64
  65 IF(NOT CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG)
  66   SET(CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG ${CMAKE_SHARED_MODULE_RUNTIME_FLAG})
  67 ENDIF(NOT CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG)
  68
  69 IF(NOT CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG_SEP)
  70   SET(CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG_SEP ${CMAKE_SHARED_MODULE_RUNTIME_FLAG_SEP})
  71 ENDIF(NOT CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG_SEP)
  72
  73 # add the flags to the cache based
  74 # on the initial values computed in the platform/*.cmake files
  75 # use _INIT variables so that this only happens the first time
  76 # and you can set these flags in the cmake cache
  77 SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS_ENV_INIT} $ENV{CXXFLAGS} ${CMAKE_CXX_FLAGS_INIT}" CACHE STRING
  78      "Flags used by the compiler during all build types.")
  79
  80
  81 IF(NOT CMAKE_NOT_USING_CONFIG_FLAGS)
  82   SET (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG_INIT}" CACHE STRING
  83      "Flags used by the compiler during debug builds.")
  84   SET (CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL_INIT}" CACHE STRING
  85       "Flags used by the compiler during release minsize builds.")
  86   SET (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE_INIT}" CACHE STRING
  87      "Flags used by the compiler during release builds (/MD /Ob1 /Oi /Ot /Oy /Gs will produce slightly less optimized but smaller files).")
  88   SET (CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT}" CACHE STRING
  89      "Flags used by the compiler during Release with Debug Info builds.")
  90
  91 ENDIF(NOT CMAKE_NOT_USING_CONFIG_FLAGS)
  92
  93
  94 INCLUDE(CMakeCommonLanguageInclude)
  95
  96 # now define the following rules:
  97 # CMAKE_CXX_CREATE_SHARED_LIBRARY
  98 # CMAKE_CXX_CREATE_SHARED_MODULE
  99 # CMAKE_CXX_CREATE_STATIC_LIBRARY
 100 # CMAKE_CXX_COMPILE_OBJECT
 101 # CMAKE_CXX_LINK_EXECUTABLE
 102
 103 # variables supplied by the generator at use time
 104 # <TARGET>
 105 # <TARGET_BASE> the target without the suffix
 106 # <OBJECTS>
 107 # <OBJECT>
 108 # <LINK_LIBRARIES>
 109 # <FLAGS>
 110 # <LINK_FLAGS>
 111
 112 # CXX compiler information
 113 # <CMAKE_CXX_COMPILER>
 114 # <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS>
 115 # <CMAKE_CXX_SHARED_MODULE_CREATE_FLAGS>
 116 # <CMAKE_CXX_LINK_FLAGS>
 117
 118 # Static library tools
 119 # <CMAKE_AR>
 120 # <CMAKE_RANLIB>
 121
 122
 123 # create a shared C++ library
 124 IF(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
 125   SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
 126       "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 127 ENDIF(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
 128
 129 IF(CMAKE_COMPILER_IS_GNUCXX)
 130   SET(CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} -lgcc")
 131 ENDIF(CMAKE_COMPILER_IS_GNUCXX)
 132
 133 # create a c++ shared module copy the shared library rule by default
 134 IF(NOT CMAKE_CXX_CREATE_SHARED_MODULE)
 135   SET(CMAKE_CXX_CREATE_SHARED_MODULE ${CMAKE_CXX_CREATE_SHARED_LIBRARY})
 136 ENDIF(NOT CMAKE_CXX_CREATE_SHARED_MODULE)
 137
 138
 139 # create a C++ static library
 140 IF(NOT CMAKE_CXX_CREATE_STATIC_LIBRARY)
 141   SET(CMAKE_CXX_CREATE_STATIC_LIBRARY
 142       "<CMAKE_AR> cr <TARGET> <LINK_FLAGS> <OBJECTS> "
 143       "<CMAKE_RANLIB> <TARGET> ")
 144 ENDIF(NOT CMAKE_CXX_CREATE_STATIC_LIBRARY)
 145
 146 # compile a C++ file into an object file
 147 IF(NOT CMAKE_CXX_COMPILE_OBJECT)
 148   SET(CMAKE_CXX_COMPILE_OBJECT
 149     "<CMAKE_CXX_COMPILER> -o <OBJECT> <FLAGS> -c <SOURCE>")
 150 ENDIF(NOT CMAKE_CXX_COMPILE_OBJECT)
 151
 152 IF(NOT CMAKE_CXX_LINK_EXECUTABLE)
 153   SET(CMAKE_CXX_LINK_EXECUTABLE
 154     "<CMAKE_CXX_COMPILER> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <FLAGS> <OBJECTS>  -o <TARGET> <LINK_LIBRARIES>")
 155 ENDIF(NOT CMAKE_CXX_LINK_EXECUTABLE)
 156
 157 IF(CMAKE_USER_MAKE_RULES_OVERRIDE)
 158    INCLUDE(${CMAKE_USER_MAKE_RULES_OVERRIDE})
 159 ENDIF(CMAKE_USER_MAKE_RULES_OVERRIDE)
 160
 161
 162 MARK_AS_ADVANCED(
 163 CMAKE_BUILD_TOOL
 164 CMAKE_VERBOSE_MAKEFILE
 165 CMAKE_CXX_FLAGS
 166 CMAKE_CXX_FLAGS_RELEASE
 167 CMAKE_CXX_FLAGS_RELWITHDEBINFO
 168 CMAKE_CXX_FLAGS_MINSIZEREL
 169 CMAKE_CXX_FLAGS_DEBUG)
 170
 171 SET(CMAKE_CXX_INFOMATION_LOADED 1)
 172