Modifica CMakeLists.txt per compilare con -fPIC

Question

Sto provando a installare i driver per un NOVINT Falcon chiamato libnifalcon. Ho usato CMake per creare un make file, ma quando corro fare ottengo l'errore:

Linking CXX shared library ../../lib/libnifalcon_cli_base.so 
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libboost_program_options-mt.a(cmdline.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC 
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libboost_program_options-mt.a: could not read symbols: Bad value 
collect2: ld returned 1 exit status 
make[2]: ** [lib/libnifalcon_cli_base.so.1.0.1] Error 1 
make[1]: ** [src/util/CMakeFiles/nifalcon_cli_base_SHARED.dir/all] Error 2 
make: *** [all] Error 2 

Ho provato molte delle tecniche per la compilazione usinf -fPIC ma nessuno ha funzionato. Qualcuno può dirmi dove si trova nel makefile e cosa scrivere per compilare usando -fPIC?

Il makefile è:

  # CMAKE generated file: DO NOT EDIT! 
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      CMAKE_EDIT_COMMAND = /usr/bin/ccmake 

      # The top-level source directory on which CMake was run. 
      CMAKE_SOURCE_DIR = /home/mikewrock/Desktop/h3d/libnifalcon-1.0.1 

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      #============================================================================= 
      # Target rules for targets named nifalcon_DEPEND 

      # Build rule for target. 
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      #============================================================================= 
      # Target rules for targets named nifalcon_STATIC 

      # Build rule for target. 
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       $(MAKE) -f CMakeFiles/Makefile2 nifalcon_STATIC 
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      # fast build rule for target. 
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       $(MAKE) -f src/CMakeFiles/nifalcon_STATIC.dir/build.make src/CMakeFiles/nifalcon_STATIC.dir/build 
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      #============================================================================= 
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      #============================================================================= 
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      # Help Target 
      help: 
       @echo "The following are some of the valid targets for this Makefile:" 
       @echo "... all (the default if no target is provided)" 
       @echo "... clean" 
       @echo "... depend" 
       @echo "... edit_cache" 
       @echo "... install" 
       @echo "... install/local" 
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Grazie per il vostro aiuto -Michael

EDIT: Come raccomandato, ho cercato di modificare CMakeLists.txt invece dei makefile che genera. Ho ancora lo stesso problema, ecco la CMakeLists.txt:

  ###################################################################################### 
      # CMake directives 
      ###################################################################################### 

      #Require 2.6 or higher. 
      CMAKE_MINIMUM_REQUIRED(VERSION 2.6.0 FATAL_ERROR) 

      #See if we've got our cmake modules checked out. If not, advise to do so. 
      IF(EXISTS "${CMAKE_SOURCE_DIR}/../compily_buildd/cmake") 
       SET(BUILDSYS_CMAKE_DIR "${CMAKE_SOURCE_DIR}/../compily_buildd/cmake") 
       MESSAGE(STATUS "Using outside compily_buildd directory ${BUILDSYS_CMAKE_DIR}") 
      ELSEIF(EXISTS "${CMAKE_SOURCE_DIR}/compily_buildd/cmake") 
       SET(BUILDSYS_CMAKE_DIR "${CMAKE_SOURCE_DIR}/compily_buildd/cmake") 
       MESSAGE(STATUS "Using compily_buildd git submodule ${BUILDSYS_CMAKE_DIR}") 
      ELSE(EXISTS "${CMAKE_SOURCE_DIR}/compily_buildd/cmake") 
       MESSAGE(FATAL_ERROR 
       "Cannot find compily_buildd directory for np labs project compilation functions.\n" 
       "Make sure you've either put the compily_buildd directory in the same root as your repository directory, or that you've used the compily_buildd submodule (git submodule update --init).\n" 
       "NP Labs build repository is available at git://github.com/qdot/compily_buildd.git" 
       ) 
      ENDIF(EXISTS "${CMAKE_SOURCE_DIR}/../compily_buildd/cmake") 

      LIST(APPEND CMAKE_MODULE_PATH ${BUILDSYS_CMAKE_DIR}) 

      INCLUDE(${BUILDSYS_CMAKE_DIR}/BuildSysCMakeLib.cmake) 

      #setting link directory policy 

      IF(COMMAND cmake_policy) 
       CMAKE_POLICY(SET CMP0003 NEW) 
      ENDIF(COMMAND cmake_policy) 

      ###################################################################################### 
      # Project declaration and options 
      ###################################################################################### 

      #Project declaration 

      PROJECT(LIBNIFALCON) 
      set(CMAKE_C_COMPILER "gcc") 
      set(CMAKE_CXX_COMPILER "g++") 
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC" ) 
      INITIALIZE_BUILD() 

      #Common Options 

      OPTION_LIBRARY_BUILD_STATIC(ON) 
      #We can't build shared on MSVC yet 
      IF(NOT MSVC) 
       OPTION_LIBRARY_BUILD_SHARED(ON) 
      ENDIF(NOT MSVC) 
      OPTION_FAST_MATH(ON) 
      OPTION_ARCH_OPTS(ON) 
      OPTION_GPROF(OFF) 
      #OPTION_LOG4CXX(OFF LIBNIFALCON_REQ_LIBS) 
      #OPTION_CREATE_VERSION_FILE(ON "${CMAKE_CURRENT_SOURCE_DIR}/src/version.cc") 

      #Project specific options 

      OPTION(FORCE_FTD2XX_BUILD "Force building FTD2XX libraries on non-windows platforms" OFF) 
      OPTION(STATIC_LINK_SUFFIXES "Add a symbolic link with [library_name]_s on static libraries (for ease in building staticly linked binaries under gcc)" OFF) 
      OPTION(BUILD_SWIG_BINDINGS "Build Java/Python bindings for libnifalcon" OFF) 
      OPTION(BUILD_EXAMPLES "Build libnifalcon examples" ON) 

      ###################################################################################### 
      # Project specific package finding 
      ###################################################################################### 

      #Find communications libraries 
      IF(WIN32 OR FORCE_FTD2XX_BUILD) 
       FIND_PACKAGE(libftd2xx) 
       IF(LIBFTD2XX_FOUND) 
       INCLUDE_DIRECTORIES(${LIBFTD2XX_INCLUDE_DIRS}) 
       SET(LIBNIFALCON_REQ_LIBS ${LIBFTD2XX_LIBRARIES}) 
       ENDIF(LIBFTD2XX_FOUND) 
      ENDIF(WIN32 OR FORCE_FTD2XX_BUILD) 

      IF(NOT LIBFTD2XX_FOUND) 
       FIND_PACKAGE(libusb-1.0) 
       IF(LIBUSB_1_FOUND) 
       INCLUDE_DIRECTORIES(${LIBUSB_1_INCLUDE_DIRS}) 
       SET(LIBNIFALCON_REQ_LIBS ${LIBUSB_1_LIBRARIES}) 
       ENDIF(LIBUSB_1_FOUND) 
      ENDIF(NOT LIBFTD2XX_FOUND) 

      IF(NOT LIBFTD2XX_FOUND AND NOT LIBUSB_1_FOUND) 
       MESSAGE(FATAL_ERROR "Either ftd2xx or libusb-1.0 is required to build libnifalcon. Check the README file for info.") 
      ENDIF(NOT LIBFTD2XX_FOUND AND NOT LIBUSB_1_FOUND) 

      #Find boost, used all over the place 
      SET(Boost_USE_MULTITHREADED ON) 
      SET(Boost_USE_STATIC_LIBS ON) 

      FIND_PACKAGE(Boost REQUIRED) 
      IF(NOT Boost_FOUND) 
       MESSAGE(FATAL_ERROR "libnifalcon requires a minimum of the Boost 1.33 headers to build") 
      ENDIF(NOT Boost_FOUND) 

      FIND_PACKAGE(Boost COMPONENTS program_options thread) 

      ###################################################################################### 
      # Project specific globals 
      ###################################################################################### 

      #library definitions 

      SET(LIBNIFALCON_MAJOR_VERSION 1) 
      SET(LIBNIFALCON_MINOR_VERSION 0) 
      SET(LIBNIFALCON_BUILD_VERSION 1) 

      # BUILDSYS_CPACK_INFO(
      # NAME "libnifalcon" 
      # MAJOR_VERSION ${LIBNIFALCON_MAJOR_VERSION} 
      # MINOR_VERSION ${LIBNIFALCON_MINOR_VERSION} 
      # BUILD_VERSION ${LIBNIFALCON_BUILD_VERSION} 
      # VENDOR "Nonpolynomial Labs" 
      # DESCRIPTION "Open Source Driver for the Novint Falcon Haptic Controller" 
      # ) 
      # INCLUDE(CPack) 

      SET(LIBNIFALCON_VERSION ${LIBNIFALCON_MAJOR_VERSION}.${LIBNIFALCON_MINOR_VERSION}.${LIBNIFALCON_BUILD_VERSION}) 

      #library name definitions 

      CREATE_LIBRARY_LINK_NAME(nifalcon) 
      CREATE_LIBRARY_LINK_NAME(nifalcon_cli_base) 
      CREATE_LIBRARY_LINK_NAME(nifalcon_device_boost_thread) 

      SET(LIBNIFALCON_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/include") 

      INCLUDE_DIRECTORIES(${LIBNIFALCON_INCLUDE_DIR} ${Boost_INCLUDE_DIRS}) 
      LINK_DIRECTORIES(${LIBRARY_OUTPUT_PATH}) 

      #If we build libusb staticly on apple, we need the proper frameworks 
      IF(BUILD_STATIC AND APPLE) 
       LIST(APPEND LIBNIFALCON_EXE_LINK_LIBS "-framework IOKit" "-framework CoreFoundation") 
      ENDIF(BUILD_STATIC AND APPLE) 

      LIST(APPEND LIBNIFALCON_EXE_LINK_LIBS 
       ${libnifalcon_LIBRARY} 
       ${LIBNIFALCON_REQ_LIBS} 
      ) 

      ADD_SUBDIRECTORY(include) 
      ADD_SUBDIRECTORY(src) 
      IF(BUILD_EXAMPLES) 
       ADD_SUBDIRECTORY(examples) 
      ENDIF(BUILD_EXAMPLES) 
      IF(BUILD_SWIG_BINDINGS) 
       ADD_SUBDIRECTORY(lang/swig) 
      ENDIF(BUILD_SWIG_BINDINGS) 

      # pkg-config (use the CPack information) 
      # FIND_PACKAGE(PkgConfig) 
      # if(PKG_CONFIG_EXECUTABLE) 
      # set(PC_SHORT_NAME "${BUILDSYS_CPACK_NAME}") 
      # set(PC_LONG_NAME "${BUILDSYS_CPACK_NAME}") 
      # set(PC_LIBRARY_NAME "${LIBNIFALCON_CPP}") 
      # set(PC_DESCRIPTION "${CPACK_PACKAGE_DESCRIPTION_SUMMARY}") 
      # set(PC_VERSION "${LIBNIFALCON_MAJOR_VERSION}.${LIBNIFALCON_MINOR_VERSION}.${LIBNIFALCON_BUILD_VERSION}") 

      # if(LIBUSB_1_FOUND) 
      #  set(PC_REQUIRES "${PC_REQUIRES}libusb-1.0 ") 
      #  set(PC_LINK_FLAGS "${PC_LINK_FLAGS}-lnifalcon_comm_libusb ") 
      # endif(LIBUSB_1_FOUND) 

      # set(PC_LINK_FLAGS "${lib${PC_LIBRARY_NAME}_LINK_FLAGS} ${PC_LINK_FLAGS}") 
      # set(PC_LINK_FLAGS "-l${PC_LIBRARY_NAME} ${PC_LINK_FLAGS}") 
      # set(PC_COMPILE_FLAGS "${lib${PC_LIBRARY_NAME}_COMPILE_FLAGS}") 
      # set(PC_CONFIGURED_FILE 
      #  ${CMAKE_BINARY_DIR}/libnifalcon.pc 
      # ) 
      # MESSAGE("-- Generating ${PC_CONFIGURED_FILE}") 
      # configure_file(
      #  ${CMAKE_SOURCE_DIR}/libnifalcon.pc.cmake 
      #  ${PC_CONFIGURED_FILE} 
      #  @ONLY 
      # ) 
      # set(PKG_CONFIG_DIR "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig") 
      # install(FILES ${PC_CONFIGURED_FILE} DESTINATION ${PKG_CONFIG_DIR}) 
      # endif(PKG_CONFIG_EXECUTABLE) 

Answer 1

È possibile aggiungere il seguente al Makefile.

CFLAGS += -fPIC 
CPPFLAGS += -fPIC 

Ma, in realtà, è necessario modificare il codice per cmake e quindi rigenerare il Makefile. Ci dovrebbe essere un modo per aggiungere a CFLAGS in cmake.

MODIFICA: Sembra che sia possibile impostare le variabili cmake CMAKE_C_FLAGS e CMAKE_CXX_FLAGS nel file di input cmake.

Answer 2

I cosa si collega alla libreria di boost errata (libboost_program_options-mt.a). È statico (.a) e probabilmente non è compilato usando fPIC. Prova a utilizzare la versione condivisa (.so).

Answer 3

Il problema era SET (Boost_USE_STATIC_LIBS ON) in CMakeLists.txt, quando modificato in SET (Boost_USE_STATIC_LIBS OFF), il makefile funzionava correttamente.

Grazie a tutti per il loro contributo