编译PCL源文件时对“png_set_longjmp_fn”的未定义引用

Question

我正在尝试从源文件安装PCL，但我有这个错误“未定义引用`png_set_longjmp_fn'”。我搜索了很多但找不到解决方案。

其他信息：现在，在我的电脑中，我安装了libpng1.6和libpng1.2。我无法删除libpng1.2，因为其他应用程序依赖它。

Scanning dependencies of target pcl_io_ply
Scanning dependencies of target pcl_pcd_convert_NaN_nan
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Building CXX object io/CMakeFiles/pcl_io.dir/src/pcd_io.cpp.o
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[ 14%] Building CXX object io/CMakeFiles/pcl_io.dir/src/png_io.cpp.o
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Linking CXX executable ../../bin/pcl_convert_pcd_ascii_binary
../../lib/libpcl_io.so.1.7.2: undefined reference to `png_set_longjmp_fn'
collect2: error: ld returned 1 exit status
io/tools/CMakeFiles/pcl_convert_pcd_ascii_binary.dir/build.make:215: recipe for target 'bin/pcl_convert_pcd_ascii_binary' failed
make[2]: *** [bin/pcl_convert_pcd_ascii_binary] Error 1
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make[1]: *** [io/tools/CMakeFiles/pcl_convert_pcd_ascii_binary.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
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Linking CXX executable ../../bin/pcl_hdl_grabber
../../lib/libpcl_io.so.1.7.2: undefined reference to `png_set_longjmp_fn'
collect2: error: ld returned 1 exit status
io/tools/CMakeFiles/pcl_hdl_grabber.dir/build.make:215: recipe for target 'bin/pcl_hdl_grabber' failed
make[2]: *** [bin/pcl_hdl_grabber] Error 1
CMakeFiles/Makefile2:602: recipe for target 'io/tools/CMakeFiles/pcl_hdl_grabber.dir/all' failed
make[1]: *** [io/tools/CMakeFiles/pcl_hdl_grabber.dir/all] Error 2
[ 18%] Building CXX object sample_consensus/CMakeFiles/pcl_sample_consensus.dir/src/sac_model_normal_sphere.cpp.o
Linking CXX shared library ../lib/libpcl_search.so
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Linking CXX shared library ../lib/libpcl_sample_consensus.so
[ 19%] Built target pcl_sample_consensus
Makefile:146: recipe for target 'all' failed
make: *** [all] Error 2

Answer 1

CMakeLists.txt中的这个修改（检查PCL源文件夹）在我的案例中有效。 （来自CMake compile options for libpng）。您应该使用以下cmake配置而不是原始配置。

# LibPNG
option(WITH_PNG "PNG file support" TRUE)
if(WITH_PNG)
    # search for pkg-config
    include (FindPkgConfig)
    if (NOT PKG_CONFIG_FOUND)
        message (FATAL_ERROR "pkg-config not found")
    endif ()

    # check for libpng
    pkg_check_modules (LIBPNG libpng16 REQUIRED)
    if (NOT LIBPNG_FOUND)
        message(FATAL_ERROR "You don't seem to have libpng16 development libraries installed")
    else ()
        include_directories (${LIBPNG_INCLUDE_DIRS})
        link_directories (${LIBPNG_LIBRARY_DIRS})
        link_libraries (${LIBPNG_LIBRARIES})
    endif ()
endif(WITH_PNG)