More user friendly (built tree is automatically used).
This commit is contained in:
Sebastien Barre
parent
e58632aed3
commit
449564a8e5
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@ -3,15 +3,17 @@
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#
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# This module defines:
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#
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# VTK_INSTALL_PATH - where is the installed version of VTK.
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# USE_BUILT_VTK - should a built-from-source version of VTK be used
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# VTK_INSTALL_PATH - Where is the installed version of VTK.
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# USE_BUILT_VTK - Should a built-from-source version of VTK be used.
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#
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# VTK_BINARY_PATH - where is (one of) the binary tree(s).
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# USE_INSTALLED_VTK - should an installed version of VTK be used
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# VTK_BINARY_PATH - Where is (one of) the binary tree(s).
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# USE_INSTALLED_VTK - Should an installed version of VTK be used
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#
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# USE_VTK_FILE - the full path and location of the UseVTK.cmake file
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# ONLY SET if ONE of the USE_BUILT_VTK or
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# USE_INSTALLED_VTK is set to ON.
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# USE_VTK_FILE - (internal)
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# Full path and location to the UseVTK.cmake file.
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# This value changes each time USE_BUILT_VTK or
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# USE_INSTALLED_VTK is modified, and only if ONE of
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# these setting is set to ON.
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#
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#
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@ -36,6 +38,15 @@ FIND_PATH(VTK_BINARY_PATH UseVTK.cmake
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$ENV{HOME}/vtkbin
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)
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#
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# If we found a built tree, USE_BUILT_VTK allows the user to
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# use it or not. Defaults to ON.
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#
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IF (VTK_BINARY_PATH)
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SET (USE_BUILT_VTK 1 CACHE BOOL
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"Use a built (versus installed) version of VTK. Be sure that VTK_BINARY_PATH is correct.")
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ENDIF (VTK_BINARY_PATH)
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#
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# Look for an installed tree
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#
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@ -49,92 +60,63 @@ FIND_PATH(VTK_INSTALL_PATH include/vtk/UseVTK.cmake
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[HKEY_LOCAL_MACHINE\\SOFTWARE\\Kitware\\VTK\\40]
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)
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#
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# If we found a built tree, USE_BUILT_VTK allows the user to
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# use it or not.
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#
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# Important: it *has* to be set to OFF first in order to allow
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# the user to change the VTK_BINARY_PATH value *before* the USE_VTK_FILE
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# is set (and the cache created).
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#
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# For example, CMake could have picked-up the wrong VTK binary path, and if
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# the related VTK cache was immediately loaded there would not be any way
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# to overwrite these cache values (even by changing the binary path or
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# USE_VTK_FILE).
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#
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IF (VTK_BINARY_PATH)
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SET (USE_BUILT_VTK 0 CACHE BOOL
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"Use a built (versus installed) version of VTK. Be sure VTK_BINARY_PATH is correct before setting it to ON.")
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ENDIF (VTK_BINARY_PATH)
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#
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# If we found an installed tree, USE_INSTALLED_VTK allows the user to
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# use it or not.
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#
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# Important: it *has* to be set to OFF first in order to allow
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# the user to change the VTK_INSTALL_PATH value before the USE_VTK_FILE
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# is set (and the cache created).
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#
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# For example, you might have simultaneously installed different major
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# versions like VTK 3.2, 4.0, 5.1, etc.
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#
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# Moreover, USE_INSTALLED_VTK has to be OFF since USE_BUILT_VTK has to be OFF
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# too (see above). If USE_INSTALLED_VTK was ON by default, then USE_VTK_FILE
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# would be set immediately (since one of them is ON) in favor of the
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# installed tree.
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# Defaults to OFF if a built tree was found before (see above), ON otherwise.
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#
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IF (VTK_INSTALL_PATH)
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SET (USE_INSTALLED_VTK 0 CACHE BOOL
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"Use an installed (versus built from source) version of VTK. Be sure VTK_INSTALL_PATH is correct before setting it to ON.")
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IF (USE_BUILT_VTK)
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SET (USE_INSTALLED_VTK 0 CACHE BOOL
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"Use an installed (versus built from source) version of VTK. Be sure that VTK_INSTALL_PATH is correct.")
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ELSE (USE_BUILT_VTK)
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SET (USE_INSTALLED_VTK 1 CACHE BOOL
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"Use an installed (versus built from source) version of VTK. Be sure that VTK_INSTALL_PATH is correct.")
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ENDIF (USE_BUILT_VTK)
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ENDIF (VTK_INSTALL_PATH)
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#
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# Set the USE_VTK_FILE only if one of USE_BUILT_VTK or USE_INSTALLED_VTK
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# is ON, i.e. if the user has decided if he wants to use either the built
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# or the installed VTK. Even if only one of the VTK flavor was found,
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# this also enable the user to change the path to his VTK (in case the
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# wrong installed or built VTK was automatically found).
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#
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# Once this decision has been made, there is no way to go back except by
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# erasing the cache. Mark these useless vars as ADVANCED to reflect this.
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# is ON.
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#
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IF (USE_BUILT_VTK)
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IF (NOT USE_INSTALLED_VTK)
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FIND_FILE(USE_VTK_FILE UseVTK.cmake ${VTK_BINARY_PATH})
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MARK_AS_ADVANCED(
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USE_BUILT_VTK
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USE_INSTALLED_VTK
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USE_VTK_FILE
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VTK_INSTALL_PATH
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)
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IF (EXISTS "${VTK_BINARY_PATH}/UseVTK.cmake")
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SET (USE_VTK_FILE "${VTK_BINARY_PATH}/UseVTK.cmake")
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ENDIF (EXISTS "${VTK_BINARY_PATH}/UseVTK.cmake")
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ENDIF (NOT USE_INSTALLED_VTK)
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ELSE (USE_BUILT_VTK)
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IF (USE_INSTALLED_VTK)
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SET (USE_VTK_FILE ${VTK_INSTALL_PATH}/include/vtk/UseVTK.cmake)
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MARK_AS_ADVANCED(
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USE_BUILT_VTK
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USE_INSTALLED_VTK
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USE_VTK_FILE
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VTK_BINARY_PATH
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)
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IF (EXISTS "${VTK_INSTALL_PATH}/include/vtk/UseVTK.cmake")
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SET (USE_VTK_FILE "${VTK_INSTALL_PATH}/include/vtk/UseVTK.cmake")
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ENDIF (EXISTS "${VTK_INSTALL_PATH}/include/vtk/UseVTK.cmake")
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ENDIF (USE_INSTALLED_VTK)
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ENDIF (USE_BUILT_VTK)
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#
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# Display a warning if both settings are set to ON.
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# Otherwise display a warning if VTK was not found.
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#
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IF (USE_BUILT_VTK AND USE_INSTALLED_VTK)
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MESSAGE ("Warning. Please make sure that only ONE of the USE_INSTALLED_VTK or USE_BUILT_VTK setting is set to ON.")
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ELSE (USE_BUILT_VTK AND USE_INSTALLED_VTK)
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IF (NOT USE_VTK_FILE)
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MESSAGE ("Warning. VTK might be found on your system as different flavours: installed VTK or built VTK. Please make sure that the VTK_INSTALL_PATH or VTK_BINARY_PATH setting reflects which VTK you are planning to use, then set ONE of the USE_INSTALLED_VTK or USE_BUILT_VTK setting to ON.")
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ENDIF (NOT USE_VTK_FILE)
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ENDIF (USE_BUILT_VTK AND USE_INSTALLED_VTK)
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# Note:
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#
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# If you use that module then you are probably relying on VTK to be found
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# on your system. As said before, it might be found as different flavours:
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# installed VTK, or (multiple) built VTK. Moreover, even if it is found
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# automatically, CMake might have picked the wrong path/version.
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#
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# Here is the CMake code you might probably want to use to work hand-in-hand
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# with that module:
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# on your system. Here is the CMake code you might probably want to use to
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# work hand-in-hand with that module (in that example CAN_BUILD is a var
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# that is set to 0 if your project can not be build):
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#
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# INCLUDE (${CMAKE_ROOT}/Modules/FindVTK.cmake)
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#
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# IF (USE_VTK_FILE)
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# INCLUDE (${USE_VTK_FILE})
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# ELSE (USE_VTK_FILE)
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# MESSAGE("Warning. This project is supposed to work with VTK, which might be found on your system as different flavours: installed VTK, or (multiple) built VTK. Please, make sure that the VTK_INSTALL_PATH or VTK_BINARY_PATH setting reflect which VTK you are planning to use, then set one of the USE_INSTALLED_VTK or USE_BUILT_VTK to ON.")
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# SET (CAN_BUILD 0)
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# ENDIF (USE_VTK_FILE)
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