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我正在尝试在 Visual Studio 2015 中编译我正在制作的 DLL，它充当 OpenVDB 中某些功能的 C 兼容包装器，使其可在现有 C 项目中使用。但是，当我构建时，我收到以下链接器错误：

Error   LNK2019 unresolved external symbol "__declspec(dllimport) public: class std::shared_ptr<class std::basic_streambuf<char,struct std::char_traits<char> > > __thiscall openvdb::v4_0_1::io::MappedFile::createBuffer(void)const " (__imp_?createBuffer@MappedFile@io@v4_0_1@openvdb@@QBE?AV?$shared_ptr@V?$basic_streambuf@DU?$char_traits@D@std@@@std@@@std@@XZ) referenced in function "private: void __thiscall openvdb::v4_0_1::tree::LeafBuffer<float,3>::doLoad(void)const " (?doLoad@?$LeafBuffer@M$02@tree@v4_0_1@openvdb@@ABEXXZ)

Error   LNK2019 unresolved external symbol "__declspec(dllimport) class std::shared_ptr<class openvdb::v4_0_1::io::StreamMetadata> __cdecl openvdb::v4_0_1::io::getStreamMetadataPtr(class std::ios_base &)" (__imp_?getStreamMetadataPtr@io@v4_0_1@openvdb@@YA?AV?$shared_ptr@VStreamMetadata@io@v4_0_1@openvdb@@@std@@AAVios_base@5@@Z) referenced in function "void __cdecl openvdb::v4_0_1::io::readCompressedValues<float,class openvdb::v4_0_1::util::NodeMask<3> >(class std::basic_istream<char,struct std::char_traits<char> > &,float *,unsigned int,class openvdb::v4_0_1::util::NodeMask<3> const &,bool)" (??$readCompressedValues@MV?$NodeMask@$02@util@v4_0_1@openvdb@@@io@v4_0_1@openvdb@@YAXAAV?$basic_istream@DU?$char_traits@D@std@@@std@@PAMIABV?$NodeMask@$02@util@12@_N@Z)

Error   LNK2019 unresolved external symbol "__declspec(dllimport) void __cdecl openvdb::v4_0_1::io::setStreamMetadataPtr(class std::ios_base &,class std::shared_ptr<class openvdb::v4_0_1::io::StreamMetadata> &,bool)" (__imp_?setStreamMetadataPtr@io@v4_0_1@openvdb@@YAXAAVios_base@std@@AAV?$shared_ptr@VStreamMetadata@io@v4_0_1@openvdb@@@5@_N@Z) referenced in function "private: void __thiscall openvdb::v4_0_1::tree::LeafBuffer<float,3>::doLoad(void)const " (?doLoad@?$LeafBuffer@M$02@tree@v4_0_1@openvdb@@ABEXXZ)

Error   LNK2019 unresolved external symbol "__declspec(dllimport) public: static class std::shared_ptr<class openvdb::v4_0_1::math::Transform> __cdecl openvdb::v4_0_1::math::Transform::createLinearTransform(class openvdb::v4_0_1::math::Mat4<double> const &)" (__imp_?createLinearTransform@Transform@math@v4_0_1@openvdb@@SA?AV?$shared_ptr@VTransform@math@v4_0_1@openvdb@@@std@@ABV?$Mat4@N@234@@Z) referenced in function "public: static class std::shared_ptr<class openvdb::v4_0_1::math::Transform> __cdecl OpenVDB_c::LinearTransform(double,double,double,double,double,double,double,double,double,double,double,double,double,double,double,double)" (?LinearTransform@OpenVDB_c@@SA?AV?$shared_ptr@VTransform@math@v4_0_1@openvdb@@@std@@NNNNNNNNNNNNNNNN@Z)

Error   LNK2019 unresolved external symbol "__declspec(dllimport) public: void __thiscall openvdb::v4_0_1::GridBase::setTransform(class std::shared_ptr<class openvdb::v4_0_1::math::Transform>)" (__imp_?setTransform@GridBase@v4_0_1@openvdb@@QAEXV?$shared_ptr@VTransform@math@v4_0_1@openvdb@@@std@@@Z) referenced in function __catch$?setGridTransform@OpenVDB_c@@QAE_NHV?$shared_ptr@VTransform@math@v4_0_1@openvdb@@@std@@@Z$0

Error   LNK2019 unresolved external symbol "__declspec(dllimport) public: class std::shared_ptr<class openvdb::v4_0_1::GridBase> __thiscall openvdb::v4_0_1::io::File::readGrid(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (__imp_?readGrid@File@io@v4_0_1@openvdb@@QAE?AV?$shared_ptr@VGridBase@v4_0_1@openvdb@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@6@@Z) referenced in function "public: int __thiscall OpenVDB_c::readGrid(int,char *)" (?readGrid@OpenVDB_c@@QAEHHPAD@Z)

Error   LNK2001 unresolved external symbol "public: virtual class std::shared_ptr<class openvdb::v4_0_1::io::Archive> __thiscall openvdb::v4_0_1::io::File::copy(void)const " (?copy@File@io@v4_0_1@openvdb@@UBE?AV?$shared_ptr@VArchive@io@v4_0_1@openvdb@@@std@@XZ)

Error   LNK2001 unresolved external symbol "public: virtual void __thiscall openvdb::v4_0_1::io::File::write(class std::vector<class std::shared_ptr<class openvdb::v4_0_1::GridBase const >,class std::allocator<class std::shared_ptr<class openvdb::v4_0_1::GridBase const > > > const &,class openvdb::v4_0_1::MetaMap const &)const " (?write@File@io@v4_0_1@openvdb@@UBEXABV?$vector@V?$shared_ptr@$$CBVGridBase@v4_0_1@openvdb@@@std@@V?$allocator@V?$shared_ptr@$$CBVGridBase@v4_0_1@openvdb@@@std@@@2@@std@@ABVMetaMap@34@@Z)

Error   LNK2001 unresolved external symbol "__declspec(dllimport) private: static union half::uif const * const half::_toFloat" (__imp_?_toFloat@half@@0QBTuif@1@B) C:\Users\t00001657\documents\visual studio 2015\Projects\OVDBC\OVDBC\ovdbc.obj  1

OpenVDB 及其所有依赖项都在包含文件夹中，其目录被添加到其他包含目录中，这是我当前在链接器选项下的附加依赖项列表：

  • 块库
  • cppunit.lib
  • glew32.lib
  • glfw3.lib
  • 半库
  • iex-2_2.lib
  • IexMath-2_2.lib
  • IlmImf-2_2.lib
  • IlmImfUtil-2_2.lib
  • IlmThread-2_2.lib
  • Imath2_2.lib
  • 打开vdb.lib
  • tbb.lib
  • tbb_debug.lib
  • tbb_preview.lib
  • tbb_preview_debug.lib
  • tbbmalloc.lib
  • tbbmalloc_debug.lib
  • tbbproxy.lib
  • zlibstaticd.lib

我似乎找不到任何关于在 Visual Studio 中使用 OpenVDB 编译的信息来涵盖此类错误，并且对于我可能忘记的内容感到非常困惑。

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2 回答 2

2

事实证明这是几个问题的组合：

  1. 我的 OpenVDB 二进制文件是使用定义的 OPENVDB_3_ABI_COMPATIBLE 编译的，因此使用的是 shared_ptr 的 boost 版本而不是 std 版本，但是在尝试构建我的项目时我没有定义 OPENVDB_3_ABI_COMPATIBLE，因此它试图使用 std 版本进行构建；因此，未定义的外部。
  2. 我没有定义 OPENEXR_DLL 和 HALF_EXPORTS，这在我不知道的情况下使用这些库构建时显然是必需的。
  3. 我正在使用 /MT 选项而不是 half.lib 使用的 /MDd 选项进行编译

最后，我需要做的就是定义 OPENEXR_DLL、HALF_EXPORTS 和 OPENVDB_3_ABI_COMPATIBLE，并将构建选项切换到 /MDd。

于 2017-06-26T16:11:56.327 回答
0

尝试使用 Vcpkg。

支持visual studio 2015,2017

https://github.com/Microsoft/vcpkg

它像 Linux 中的 yum 一样易于使用。

于 2018-07-01T16:06:20.840 回答