[CMake] Using CMake to interface with non-CMake libraries

[Andreas Naumann]

Hey Zoey,

I don't know anything about SOLID, but the errormessage means, your 
program needs to be linked against a library.

You could ask cmake to look for your SOLID library:
find_library(SOLID_LIBRARY solid)
if(NOT SOLID_LIBRARY)
   message(ERROR "please specify the library for SOLID")
endif(NOT SOLID_LIBRARY)

add extend the target_link_libraries call with ${SOLID_LIBRARY}:

target_link_libraries(hybrid_PRM_demo ${QT3_LIBRARIES} ${CGAL_LIBRARIES}
${CGAL_3RD_PARTY_LIBRARIES} ${SOLID_LIBRARY})

I hope that helps you a little bit.

Andreas

Am 24.07.2011 12:09, schrieb Zoey McCarthy:
> Hello everyone,
>
> I am new to using CMake and I am trying to compile a program that uses two
> libraries, one of which needs to be built using CMake, and the other, that
> utilizes its own build system(the Makefiles were generated using ./configure).
> The two libraries are CGAL and SOLID (for collision detection).
>
> CGAL provides a script, cgal_create_cmake_script , that produces the
> CMakeLists.txt file for an executable that includes the CGAL library.  I can
> build my executable fine using cmake and make when I only try to include CGAL.
> When I try to include SOLID, I have issues with finding class definitions during
> linking, i.e. I get errors of the type:
>
> /home/zoeymccarthy/hybrid_PRM/CollisionChecker.h:146: undefined reference to
> `DT_GenResponseClass'
>
> SOLID is installed in /usr/local/include/SOLID/ and /usr/include/SOLID/. The
> header files for the library were installed there, but I have since tried
> copying the rest of the files associated with the library there since the
> compiler was able to locate the header files.
>
>
> This is the CMakeLists.txt that the CGAL script generated for my project:
>
>
>
> # Created by the script cgal_create_cmake_script
> # This is the CMake script for compiling a CGAL application.
>
>
> project( hybrid_PRM_demo )
>
> CMAKE_MINIMUM_REQUIRED(VERSION 2.4.5)
>
> set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
>
> if ( COMMAND cmake_policy )
>    cmake_policy( SET CMP0003 NEW )
> endif()
>
> find_package(CGAL QUIET COMPONENTS Core Qt3 )
>
> if ( CGAL_FOUND )
>
>    include( ${CGAL_USE_FILE} )
>
>    find_package(Qt3-patched QUIET )
>    # FindQt3-patched.cmake is FindQt3.cmake patched by CGAL developers, so
>    # that it can be used together with FindQt4: all its variables are prefixed
>    # by "QT3_" instead of "QT_".
>
>    if(CGAL_Qt3_FOUND AND QT3_FOUND)
>
>      include( Qt3Macros-patched )
>      qt3_automoc(  main.cpp )
>
>      # Make sure the compiler can find generated .moc files
>      include_directories(BEFORE ${CMAKE_CURRENT_BINARY_DIR})
>
>      include_directories( ${QT3_INCLUDE_DIR} )
>
>      add_executable  (hybrid_PRM_demo  main.cpp)
>
>      add_to_cached_list( CGAL_EXECUTABLE_TARGETS hybrid_PRM_demo )
>
>
>      # Link the executable to CGAL and third-party libraries
>      target_link_libraries(hybrid_PRM_demo ${QT3_LIBRARIES} ${CGAL_LIBRARIES}
> ${CGAL_3RD_PARTY_LIBRARIES} )
>    else()
>
>      message(STATUS "NOTICE: This demo requires Qt3 and the CGAL Qt3 library, and
> will not be compiled.")
>
>    endif()
>
> else()
>
>      message(STATUS "NOTICE: This demo requires the CGAL library, and will not be
> compiled.")
>
> endif()
>
>
>
>
> As you can see, there is no reference to SOLID.  How should I modify it so that
> the resulting Makefile will know where to link to my SOLID object files, given
> that SOLID has no .cmake file associated with it, and the library was built
> without any CMakeLists.txt files?  I've tried adding the following two lines:
>
> include_directories(/usr/include/SOLID/)
> link_directories(/usr/include/SOLID/)
>
> to the middle of my CMakeLists.txt (before if ( CGAL_FOUND) ), but it results in
> the same error.
>
> I'm sorry if this is a stupid question, but for the life of me I can't get it to
> work.
>
>
> Thank you for your help,
>
> Zoey
>
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