Modules/CMakeCXXInformation.cmake

   1
   2 # This file sets the basic flags for the C++ language in CMake.
   3 # It also loads the available platform file for the system-compiler
   4 # if it exists.
   5 # It also loads a system - compiler - processor (or target hardware)
   6 # specific file, which is mainly useful for crosscompiling and embedded systems.
   7
   8 # some compilers use different extensions (e.g. sdcc uses .rel)
   9 # so set the extension here first so it can be overridden by the compiler specific file
  10 IF(UNIX)
  11   SET(CMAKE_CXX_OUTPUT_EXTENSION .o)
  12 ELSE(UNIX)
  13   SET(CMAKE_CXX_OUTPUT_EXTENSION .obj)
  14 ENDIF(UNIX)
  15
  16
  17 GET_FILENAME_COMPONENT(CMAKE_BASE_NAME ${CMAKE_CXX_COMPILER} NAME_WE)
  18 # since the gnu compiler has several names force g++
  19 IF(CMAKE_COMPILER_IS_GNUCXX)
  20   SET(CMAKE_BASE_NAME g++)
  21 ENDIF(CMAKE_COMPILER_IS_GNUCXX)
  22
  23
  24 # load a hardware specific file, mostly useful for embedded compilers
  25 IF(CMAKE_SYSTEM_PROCESSOR)
  26   IF(CMAKE_CXX_COMPILER_ID)
  27     INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
  28   ENDIF(CMAKE_CXX_COMPILER_ID)
  29   IF (NOT _INCLUDED_FILE)
  30     INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
  31   ENDIF (NOT _INCLUDED_FILE)
  32 ENDIF(CMAKE_SYSTEM_PROCESSOR)
  33
  34 # load the system- and compiler specific files
  35 IF(CMAKE_CXX_COMPILER_ID)
  36   INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
  37 ENDIF(CMAKE_CXX_COMPILER_ID)
  38 IF (NOT _INCLUDED_FILE)
  39   INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL)
  40 ENDIF (NOT _INCLUDED_FILE)
  41
  42
  43 # This should be included before the _INIT variables are
  44 # used to initialize the cache.  Since the rule variables
  45 # have if blocks on them, users can still define them here.
  46 # But, it should still be after the platform file so changes can
  47 # be made to those values.
  48
  49 IF(CMAKE_USER_MAKE_RULES_OVERRIDE)
  50    INCLUDE(${CMAKE_USER_MAKE_RULES_OVERRIDE})
  51 ENDIF(CMAKE_USER_MAKE_RULES_OVERRIDE)
  52
  53 IF(CMAKE_USER_MAKE_RULES_OVERRIDE_CXX)
  54    INCLUDE(${CMAKE_USER_MAKE_RULES_OVERRIDE_CXX})
  55 ENDIF(CMAKE_USER_MAKE_RULES_OVERRIDE_CXX)
  56
  57
  58 # for most systems a module is the same as a shared library
  59 # so unless the variable CMAKE_MODULE_EXISTS is set just
  60 # copy the values from the LIBRARY variables
  61 IF(NOT CMAKE_MODULE_EXISTS)
  62   SET(CMAKE_SHARED_MODULE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
  63 ENDIF(NOT CMAKE_MODULE_EXISTS)
  64 # Create a set of shared library variable specific to C++
  65 # For 90% of the systems, these are the same flags as the C versions
  66 # so if these are not set just copy the flags from the c version
  67 IF(NOT CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS)
  68   SET(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS})
  69 ENDIF(NOT CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS)
  70
  71 IF(NOT CMAKE_SHARED_LIBRARY_CXX_FLAGS)
  72   SET(CMAKE_SHARED_LIBRARY_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_C_FLAGS})
  73 ENDIF(NOT CMAKE_SHARED_LIBRARY_CXX_FLAGS)
  74
  75 IF(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)
  76   SET(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS ${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS})
  77 ENDIF(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)
  78
  79 IF(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG)
  80   SET(CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG})
  81 ENDIF(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG)
  82
  83 IF(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP)
  84   SET(CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP})
  85 ENDIF(NOT CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP)
  86
  87 IF(NOT CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG)
  88   SET(CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG})
  89 ENDIF(NOT CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG)
  90
  91 IF(NOT CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG)
  92   SET(CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG})
  93 ENDIF(NOT CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG)
  94
  95 IF(NOT CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG_SEP)
  96   SET(CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_CXX_FLAG_SEP})
  97 ENDIF(NOT CMAKE_EXECUTABLE_RUNTIME_CXX_FLAG_SEP)
  98
  99 IF(NOT CMAKE_EXECUTABLE_RPATH_LINK_CXX_FLAG)
 100   SET(CMAKE_EXECUTABLE_RPATH_LINK_CXX_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_CXX_FLAG})
 101 ENDIF(NOT CMAKE_EXECUTABLE_RPATH_LINK_CXX_FLAG)
 102
 103 IF(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_CXX_WITH_RUNTIME_PATH)
 104   SET(CMAKE_SHARED_LIBRARY_LINK_CXX_WITH_RUNTIME_PATH ${CMAKE_SHARED_LIBRARY_LINK_C_WITH_RUNTIME_PATH})
 105 ENDIF(NOT DEFINED CMAKE_SHARED_LIBRARY_LINK_CXX_WITH_RUNTIME_PATH)
 106
 107 IF(NOT CMAKE_INCLUDE_FLAG_CXX)
 108   SET(CMAKE_INCLUDE_FLAG_CXX ${CMAKE_INCLUDE_FLAG_C})
 109 ENDIF(NOT CMAKE_INCLUDE_FLAG_CXX)
 110
 111 IF(NOT CMAKE_INCLUDE_FLAG_SEP_CXX)
 112   SET(CMAKE_INCLUDE_FLAG_SEP_CXX ${CMAKE_INCLUDE_FLAG_SEP_C})
 113 ENDIF(NOT CMAKE_INCLUDE_FLAG_SEP_CXX)
 114
 115 # repeat for modules
 116 IF(NOT CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS)
 117   SET(CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS ${CMAKE_SHARED_MODULE_CREATE_C_FLAGS})
 118 ENDIF(NOT CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS)
 119
 120 IF(NOT CMAKE_SHARED_MODULE_CXX_FLAGS)
 121   SET(CMAKE_SHARED_MODULE_CXX_FLAGS ${CMAKE_SHARED_MODULE_C_FLAGS})
 122 ENDIF(NOT CMAKE_SHARED_MODULE_CXX_FLAGS)
 123
 124 IF(NOT CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG)
 125   SET(CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG ${CMAKE_SHARED_MODULE_RUNTIME_FLAG})
 126 ENDIF(NOT CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG)
 127
 128 IF(NOT CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG_SEP)
 129   SET(CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG_SEP ${CMAKE_SHARED_MODULE_RUNTIME_FLAG_SEP})
 130 ENDIF(NOT CMAKE_SHARED_MODULE_RUNTIME_CXX_FLAG_SEP)
 131
 132 # Initialize CXX link type selection flags from C versions.
 133 FOREACH(type SHARED_LIBRARY SHARED_MODULE EXE)
 134   IF(NOT CMAKE_${type}_LINK_STATIC_CXX_FLAGS)
 135     SET(CMAKE_${type}_LINK_STATIC_CXX_FLAGS
 136       ${CMAKE_${type}_LINK_STATIC_C_FLAGS})
 137   ENDIF(NOT CMAKE_${type}_LINK_STATIC_CXX_FLAGS)
 138   IF(NOT CMAKE_${type}_LINK_DYNAMIC_CXX_FLAGS)
 139     SET(CMAKE_${type}_LINK_DYNAMIC_CXX_FLAGS
 140       ${CMAKE_${type}_LINK_DYNAMIC_C_FLAGS})
 141   ENDIF(NOT CMAKE_${type}_LINK_DYNAMIC_CXX_FLAGS)
 142 ENDFOREACH(type)
 143
 144 # add the flags to the cache based
 145 # on the initial values computed in the platform/*.cmake files
 146 # use _INIT variables so that this only happens the first time
 147 # and you can set these flags in the cmake cache
 148 SET(CMAKE_CXX_FLAGS_INIT "$ENV{CXXFLAGS} ${CMAKE_CXX_FLAGS_INIT}")
 149 # avoid just having a space as the initial value for the cache
 150 IF(CMAKE_CXX_FLAGS_INIT STREQUAL " ")
 151   SET(CMAKE_CXX_FLAGS_INIT)
 152 ENDIF(CMAKE_CXX_FLAGS_INIT STREQUAL " ")
 153 SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS_INIT}" CACHE STRING
 154      "Flags used by the compiler during all build types.")
 155
 156 IF(NOT CMAKE_NOT_USING_CONFIG_FLAGS)
 157   SET (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG_INIT}" CACHE STRING
 158      "Flags used by the compiler during debug builds.")
 159   SET (CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL_INIT}" CACHE STRING
 160       "Flags used by the compiler during release minsize builds.")
 161   SET (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE_INIT}" CACHE STRING
 162      "Flags used by the compiler during release builds (/MD /Ob1 /Oi /Ot /Oy /Gs will produce slightly less optimized but smaller files).")
 163   SET (CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT}" CACHE STRING
 164      "Flags used by the compiler during Release with Debug Info builds.")
 165
 166 ENDIF(NOT CMAKE_NOT_USING_CONFIG_FLAGS)
 167
 168 IF(CMAKE_CXX_STANDARD_LIBRARIES_INIT)
 169   SET(CMAKE_CXX_STANDARD_LIBRARIES "${CMAKE_CXX_STANDARD_LIBRARIES_INIT}"
 170     CACHE STRING "Libraries linked by defalut with all C++ applications.")
 171   MARK_AS_ADVANCED(CMAKE_CXX_STANDARD_LIBRARIES)
 172 ENDIF(CMAKE_CXX_STANDARD_LIBRARIES_INIT)
 173
 174 INCLUDE(CMakeCommonLanguageInclude)
 175
 176 # now define the following rules:
 177 # CMAKE_CXX_CREATE_SHARED_LIBRARY
 178 # CMAKE_CXX_CREATE_SHARED_MODULE
 179 # CMAKE_CXX_COMPILE_OBJECT
 180 # CMAKE_CXX_LINK_EXECUTABLE
 181
 182 # variables supplied by the generator at use time
 183 # <TARGET>
 184 # <TARGET_BASE> the target without the suffix
 185 # <OBJECTS>
 186 # <OBJECT>
 187 # <LINK_LIBRARIES>
 188 # <FLAGS>
 189 # <LINK_FLAGS>
 190
 191 # CXX compiler information
 192 # <CMAKE_CXX_COMPILER>
 193 # <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS>
 194 # <CMAKE_CXX_SHARED_MODULE_CREATE_FLAGS>
 195 # <CMAKE_CXX_LINK_FLAGS>
 196
 197 # Static library tools
 198 # <CMAKE_AR>
 199 # <CMAKE_RANLIB>
 200
 201
 202 # create a shared C++ library
 203 IF(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
 204   SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
 205       "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 206 ENDIF(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
 207
 208 # create a c++ shared module copy the shared library rule by default
 209 IF(NOT CMAKE_CXX_CREATE_SHARED_MODULE)
 210   SET(CMAKE_CXX_CREATE_SHARED_MODULE ${CMAKE_CXX_CREATE_SHARED_LIBRARY})
 211 ENDIF(NOT CMAKE_CXX_CREATE_SHARED_MODULE)
 212
 213
 214 # Create a static archive incrementally for large object file counts.
 215 # If CMAKE_CXX_CREATE_STATIC_LIBRARY is set it will override these.
 216 SET(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> cr <TARGET> <LINK_FLAGS> <OBJECTS>")
 217 SET(CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> r  <TARGET> <LINK_FLAGS> <OBJECTS>")
 218 SET(CMAKE_CXX_ARCHIVE_FINISH "<CMAKE_RANLIB> <TARGET>")
 219
 220 # compile a C++ file into an object file
 221 IF(NOT CMAKE_CXX_COMPILE_OBJECT)
 222   SET(CMAKE_CXX_COMPILE_OBJECT
 223     "<CMAKE_CXX_COMPILER>  <DEFINES> <FLAGS> -o <OBJECT> -c <SOURCE>")
 224 ENDIF(NOT CMAKE_CXX_COMPILE_OBJECT)
 225
 226 IF(NOT CMAKE_CXX_LINK_EXECUTABLE)
 227   SET(CMAKE_CXX_LINK_EXECUTABLE
 228     "<CMAKE_CXX_COMPILER>  <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS>  -o <TARGET> <LINK_LIBRARIES>")
 229 ENDIF(NOT CMAKE_CXX_LINK_EXECUTABLE)
 230
 231 MARK_AS_ADVANCED(
 232 CMAKE_BUILD_TOOL
 233 CMAKE_VERBOSE_MAKEFILE
 234 CMAKE_CXX_FLAGS
 235 CMAKE_CXX_FLAGS_RELEASE
 236 CMAKE_CXX_FLAGS_RELWITHDEBINFO
 237 CMAKE_CXX_FLAGS_MINSIZEREL
 238 CMAKE_CXX_FLAGS_DEBUG)
 239
 240 SET(CMAKE_CXX_INFORMATION_LOADED 1)
 241