[CMake] Building a project with Subdirs(Qt4 and OpenCascade inside)

[Michael Hertling]

On 08/31/2010 03:03 PM, Christian Lohr wrote:
> Hi,
> I have a more or less complicated program to compile. It's splitted up
> in several small libraries, which have seperate directories for header
> and source files, and a main applikation.
> It compiled, but it ended up with a linker error, seems he couldn't
> link against OpenCASCADE and Qt properly.

Where do you link against the OPENCASCADE_LIBRARIES?

Regards,

Michael

> It's divided in:
> 
> applikation                     // <- is the main application, depends
> on "baselib", "importlib", "lodlib" and "representationlib"
> 
> baselib
> baselib/inc
> baselib/src
> 
> importlib                         // <- uses OpenCascade, and QtCore
> depends on "baselib"
> importlib/inc
> importlib/src
> 
> lodlib                               // <- uses QtCore(only the class
> QString), depends on "baselib"
> lodlib/inc
> lodlib/src
> 
> representationlib                // <- uses QtGui and QtOpenGL,
> depends on "baselib"
> representationlib/inc
> representationlib/src
> 
> -----------------------------------------lodlib/CMakeLists.txt
> ---------------------------------------------------------------------
> project(lodlib)
> 
> cmake_minimum_required(VERSION 2.6.0)
> find_package(Qt4 COMPONENTS QtCore REQUIRED)
> include(${QT_USE_FILE})
> 
> set(lodlib_SRCS
> 	inc/drawsettings.h
> 	inc/gridbox.h
> 	inc/node.h
> 	inc/quader.h
> 	inc/vertextree.h
> 	src/drawsettings.cpp
> 	src/gridbox.cpp
> 	src/node.cpp
> 	src/quader.cpp
> 	src/vertextree.cpp
> )
> 
> include_directories(${CMAKE_CURRENT_BINARY_DIR})
> add_library(lodlib STATIC ${lodlib_SRCS})
> 
> -------------------------------applikation/CMakeLists.txt
> ------------------------------------------------------------
> 
> project(applikation)
> 
> cmake_minimum_required(VERSION 2.6.0)
> find_package(Qt4 COMPONENTS QtCore QtGui QtOpenGL REQUIRED)
> include(${QT_USE_FILE})
> 
> set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR})
> find_package(OpenCASCADE REQUIRED)
> 
> set(applikations_SRCS
> 	main.cpp
> )
> 
> include_directories(${CMAKE_CURRENT_BINARY_DIR})
> 
> add_executable(applikation ${applikations_SRCS})
> target_link_libraries(applikation ${QT_LIBRARIES})
> target_link_libraries(applikation baselib importlib lodlib representationlib)
> 
> -------------------------------------------------
> baselib/CMakeLists.txt
> ----------------------------------------------------------------------------------
> 
> project(baselib)
> 
> cmake_minimum_required(VERSION 2.6.0)
> 
> set(baselib_SRCS
> 	inc/triangle.h
> 	inc/vector3f.h
> 	inc/vertex3f.h
> 	src/vector3f.cpp
> 	src/vertex3f.cpp
> )
> 
> add_library(baselib STATIC ${baselib_SRCS})
> 
> --------------------------------------------- importlib/CMakeLists.txt
> ---------------------------------------------------------------------------------------
> 
> project(importlib)
> 
> cmake_minimum_required(VERSION 2.6.0)
> find_package(Qt4 COMPONENTS QtCore REQUIRED)
> 
> # OpenCASCADE
> set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR})
> find_package(OpenCASCADE REQUIRED)
> 
> include(${QT_USE_FILE})
> 
> set(importlib_SRCS
> 	inc/abstractreader.h
> 	inc/stepreader.h
> 	inc/stlreader.h
> 	src/abstractreader.cpp
> 	src/stepreader.cpp
> 	src/stlreader.cpp
> )
> 
> include_directories(${CMAKE_CURRENT_BINARY_DIR})
> add_library(importlib STATIC ${importlib_SRCS})
> 
> --------------------------------------------
> representationlib/CMakeLists.txt
> ------------------------------------------------------------------------------------------
> 
> project(representationlib)
> 
> cmake_minimum_required(VERSION 2.6.0)
> 
> find_package(Qt4 COMPONENTS QtCore QtGui QtOpenGL REQUIRED)
> include(${QT_USE_FILE})
> 
> set(representationlib_SRCS
> 	src/representationwindow.cpp
> )
> 
> set(representationlib_HDRS
> 	inc/representationwindow.h
> )
> 
> qt4_wrap_cpp(representationlib_SRCS ${representationlib_HDRS})
> include_directories(${CMAKE_CURRENT_BINARY_DIR})
> 
> add_library(representationlib STATIC ${representationlib_SRCS})
> 
> ----------------------------------------------- ./CMakeLists.txt
> -----------------------------------------------------------------------------------------------
> 
> project(PackAssi)
> 
> cmake_minimum_required(VERSION 2.6.0)
> 
> include_directories(baselib/inc)
> include_directories(importlib/inc)
> include_directories(lodlib/inc)
> include_directories(representationlib/inc)
> 
> link_directories(baselib/src)
> link_directories(importlib/src)
> link_directories(lodlib/src)
> link_directories(representationlib/src)
> 
> add_subdirectory(applikation)
> add_subdirectory(baselib)
> add_subdirectory(importlib)
> add_subdirectory(lodlib)
> add_subdirectory(representationlib)
> 
> ---------------------------------------------------------
> FindOpenCASCADE.cmake (several places)
> ---------------------------------------------
> # - try to find OpenCascade Library and include files
> # OPENCASCADE_INCLUDE_DIR where to find Standard.hxx, etc.
> # OPENCASCADE_LIBRARIES libraries to link against
> # OPENCASCADE_FOUND If false, do not try to use OPENCASCADE
> 
> #=============================================================================
> # This software is distributed WITHOUT ANY WARRANTY; without even the
> # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> # See the License for more information.
> #
> # Created by Christian Lohr
> #=============================================================================
> 
> FIND_PATH ( OPENCASCADE_INCLUDE_DIR Standard.hxx PATHS
>                 /usr/include/opencascade
>                 /usr/local/include/opencascade
>                 $ENV{CASROOT}/inc
> )
> 
> INCLUDE_DIRECTORIES(/usr/include/opencascade ${OPENCASCADE_INCLUDE_DIR})
> 
> IF( WIN32 )
>         ADD_DEFINITIONS(-DWNT)
> ENDIF( WIN32 )
> 
> FIND_LIBRARY( OPENCASCADE_LIB_TKERNEL		NAMES TKernel PATHS
> $ENV{CASROOT}/win32/lib)
> FIND_LIBRARY( OPENCASCADE_LIB_TKMATH		NAMES TKMath PATHS
> $ENV{CASROOT}/win32/lib)
> FIND_LIBRARY( OPENCASCADE_LIB_TKSTEP		NAMES TKSTEP PATHS
> $ENV{CASROOT}/win32/lib)
> FIND_LIBRARY( OPENCASCADE_LIB_TKSTL		NAMES TKSTL PATHS $ENV{CASROOT}/win32/lib)
> FIND_LIBRARY( OPENCASCADE_LIB_TKXBASE		NAMES TKXSBase PATHS
> $ENV{CASROOT}/win32/lib)
> FIND_LIBRARY( OPENCASCADE_LIB_TKTOPALGO		NAMES TKTopAlgo PATHS
> $ENV{CASROOT}/win32/lib)
> FIND_LIBRARY( OPENCASCADE_LIB_TKBREP		NAMES TKBRep PATHS
> $ENV{CASROOT}/win32/lib)
> 
> SET( OPENCASCADE_LIBRARIES ${OPENCASCADE_LIBRARIES}
>         ${OPENCASCADE_LIB_TKERNEL}
>         ${OPENCASCADE_LIB_TKMATH}
>         ${OPENCASCADE_LIB_TKSTEP}
>         ${OPENCASCADE_LIB_TKSTL}
>         ${OPENCASCADE_LIB_TKXBASE}
>         ${OPENCASCADE_LIB_TKTOPALGO}
>         ${OPENCASCADE_LIB_TKBREP}
> )
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