无法构建环绕 360_render - CMake 问题

Question

背景 我在全新安装的 Kubuntu 16.04.04 LTS 上运行它。 我正在尝试根据以下代码和说明构建环绕360_render：https://github.com/facebook/Surround360/tree/master/surround360_render

• 除了 python、numpy、pip 的说明外，我都按照说明进行操作。 gooey，pil 安装（我不需要 python）。
• 根据此处的说明安装 ceres，而不是 ceres git 页面上的说明。
• 已安装 llvm、Halide 以使用加速 ISP

在制作 ...360_render 时出现以下错误：

[ 92%] Linking CXX executable bin/Unpacker
//usr/local/lib/libfolly.a(Conv.cpp.o): In function `folly::Expected<float, folly::ConversionCode> folly::detail::str_to_floating<float>(folly::Range<char const*>*)':
/home/rinka/bin/fb-lib/folly/folly/folly/Conv.cpp:354: undefined reference to `double_conversion::StringToDoubleConverter::StringToDouble(char const*, int, int*) const'
//usr/local/lib/libfolly.a(Conv.cpp.o): In function `folly::Expected<double, folly::ConversionCode> folly::detail::str_to_floating<double>(folly::Range<char const*>*)':
/home/rinka/bin/fb-lib/folly/folly/folly/Conv.cpp:354: undefined reference to `double_conversion::StringToDoubleConverter::StringToDouble(char const*, int, int*) const'
//usr/local/lib/libfolly.a(dynamic.cpp.o): In function `double_conversion::DoubleToStringConverter::ToShortest(double, double_conversion::StringBuilder*) const':
/usr/local/include/double-conversion/double-conversion.h:158: undefined reference to `double_conversion::DoubleToStringConverter::ToShortestIeeeNumber(double, double_conversion::StringBuilder*, double_conversion::DoubleToStringConverter::DtoaMode) const'
//usr/local/lib/libfolly.a(dynamic.cpp.o): In function `std::enable_if<std::is_floating_point<double>::value&&folly::IsSomeString<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::value, void>::type folly::toAppend<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>(double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int)':
/home/rinka/bin/fb-lib/folly/folly/folly/Conv.h:704: undefined reference to `double_conversion::DoubleToStringConverter::ToFixed(double, int, double_conversion::StringBuilder*) const'
/home/rinka/bin/fb-lib/folly/folly/folly/Conv.h:708: undefined reference to `double_conversion::DoubleToStringConverter::ToPrecision(double, int, double_conversion::StringBuilder*) const'
//usr/local/lib/libfolly.a(Format.cpp.o): In function `folly::FormatValue<double, void>::formatHelper(folly::basic_fbstring<char, std::char_traits<char>, std::allocator<char>, folly::fbstring_core<char> >&, int&, folly::FormatArg&) const':
/home/rinka/bin/fb-lib/folly/folly/folly/Format.cpp:162: undefined reference to `double_conversion::DoubleToStringConverter::ToFixed(double, int, double_conversion::StringBuilder*) const'
/home/rinka/bin/fb-lib/folly/folly/folly/Format.cpp:181: undefined reference to `double_conversion::DoubleToStringConverter::ToExponential(double, int, double_conversion::StringBuilder*) const'
collect2: error: ld returned 1 exit status
CMakeFiles/TestRenderStereoPanorama.dir/build.make:112: recipe for target 'bin/TestRenderStereoPanorama' failed
make[2]: *** [bin/TestRenderStereoPanorama] Error 1
CMakeFiles/Makefile2:556: recipe for target 'CMakeFiles/TestRenderStereoPanorama.dir/all' failed
make[1]: *** [CMakeFiles/TestRenderStereoPanorama.dir/all] Error 2
[ 96%] Built target Unpacker
[ 96%] Built target GeometricCalibration
Makefile:83: recipe for target 'all' failed

到目前为止我所做的尝试

• 我尝试实现https://github.com/facebook/Surround360/issues/253 失败。我收到以下消息：

  [ 98%] Generating folly_dep.cpp
  Scanning dependencies of target folly
  [ 98%] Building CXX object CMakeFiles/folly.dir/folly_dep.cpp.o
  [ 99%] Linking CXX shared library libfolly.so
  /usr/bin/ld: CMakeFiles/folly_base.dir/folly/ClockGettimeWrappers.cpp.o: relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC
  CMakeFiles/folly_base.dir/folly/ClockGettimeWrappers.cpp.o: error adding symbols: Bad value
  collect2: error: ld returned 1 exit status
  CMakeFiles/folly.dir/build.make:514: recipe for target 'libfolly.so' failed
  make[2]: *** [libfolly.so] Error 1
  CMakeFiles/Makefile2:180: recipe for target 'CMakeFiles/folly.dir/all' failed
  make[1]: *** [CMakeFiles/folly.dir/all] Error 2
  Makefile:127: recipe for target 'all' failed
  

• 假设 apt 安装的标准 double-conversion-dev 库有问题，我卸载了它，使用以下说明重新编译了 double-conversion：

  git clone https://github.com/google/double-conversion.git
  cd double-conversion
  cmake -DBUILD_SHARED_LIBS=ON .
  make -j $(nproc)
  sudo make install
  

• 并重建愚蠢如下：

  $ cmake configure ..
  $ make -j $(nproc)
  

没用。重做 cmake & make

    $ cmake configure "-DCMAKE_INCLUDE_PATH=$HOME/bin/fb-lib/double-conversion/build/include" "-DCMAKE_LIBRARY_PATH=$HOME/bin/fb-lib/double-conversion/build//lib" ..
    $ make -j $(nproc)

我收到以下错误：

    CMake Error at CMakeLists.txt:201 (find_package):
        Could not find a package configuration file provided by "double-conversion"
        with any of the following names:

        double-conversionConfig.cmake
        double-conversion-config.cmake

    Add the installation prefix of "double-conversion" to CMAKE_PREFIX_PATH or
    set "double-conversion_DIR" to a directory containing one of the above
    files.  If "double-conversion" provides a separate development package or
    SDK, be sure it has been installed.

Answer 1

问题是因为“双重转换”没有作为库包含在环绕360_render 的各个模块中。为解决问题，修改surround360_render目录下的CMakeLists.txt如下：

添加：

双重转换

到失败的各种模块的 TARGET_LINK_LIBRARIES 部分。就我而言，失败的模块是：TestRenderStereoPanorama、TestHyperPreview、TestPoleRemoval、TestColorCalibration、TestVignettingCalibration、TestVignettingDataAcquisition 和 GeometricCalibration

之所以列出这些，是因为模块比这些多，这就是为什么不需要添加双重转换作为要链接的默认库的原因。

将其放在这里以防其他人遇到类似问题。