Chỉnh sửa CMakeLists.txt để biên dịch với -fPIC

Question

Tôi đang cố cài đặt trình điều khiển cho NOVINT Falcon có tên là libnifalcon. Tôi đã sử dụng cmake để tạo một tệp, nhưng khi tôi chạy làm cho tôi nhận được lỗi:

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 

Tôi đã thử nhiều kỹ thuật để biên dịch usinf -fPIC nhưng không có tác dụng nào. Bất cứ ai có thể cho tôi biết nơi trong makefile, và những gì để viết để biên dịch bằng cách sử dụng -fPIC?

Các makefile là:

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Nhờ sự giúp đỡ của bạn -Michael

EDIT: Theo đề xuất, tôi đã cố gắng sửa đổi CMakeLists.txt thay cho makefiles nó tạo ra. Tôi vẫn gặp sự cố tương tự, vì vậy, đây là 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

Bạn có thể thêm thông tin sau vào Makefile.

CFLAGS += -fPIC 
CPPFLAGS += -fPIC 

Nhưng, thực sự, bạn nên sửa đổi mã cho cmake và sau đó tạo lại Makefile. Nên có một cách để thêm vào CFLAGS trong cmake.

EDIT: Có vẻ như bạn có thể đặt biến cmake CMAKE_C_FLAGS và CMAKE_CXX_FLAGS trong tệp đầu vào cmake.

Answer 2

Tôi điều bạn đang liên kết với thư viện tăng sai (libboost_program_options-mt.a). Nó là tĩnh (.a) và có thể không được biên dịch bằng fPIC. Hãy thử sử dụng phiên bản được chia sẻ (.so).

Answer 3

Vấn đề là SET (Boost_USE_STATIC_LIBS ON) trong CMakeLists.txt, khi được đổi thành SET (Boost_USE_STATIC_LIBS OFF), makefile hoạt động tốt.

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