c++ - Assimp 链接错误

Question

我刚刚下载了 assimp 3.0 库并使用 cmake 构建了所需的 make 文件，然后编译并构建了库本身，这个过程是成功的(对 StepFile.h 稍作修改)，

我的 assimp 头文件夹位于:

/usr/local/include

我的 libassimp.a 位于:

/usr/local/lib

然而，当我在我的命令行项目中指定库和头文件并尝试测试我的项目时，我收到以下错误:

Undefined symbols for architecture x86_64:
"Assimp::Importer::Importer()", referenced from:
  _main in main.o
"Assimp::Importer::~Importer()", referenced from:
  _main in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation) 

当我将 -lassimp 添加到 Other Linker Flags 时，出现以下错误:

Undefined symbols for architecture x86_64:
"_crc32", referenced from:
  _unzReadCurrentFile in libassimp.a(unzip.c.o)
"_get_crc_table", referenced from:
  _unzOpenCurrentFile3 in libassimp.a(unzip.c.o)
"_inflate", referenced from:
  Assimp::XGLImporter::InternReadFile(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, aiScene*, Assimp::IOSystem*) in libassimp.a(XGLLoader.cpp.o)
  Assimp::BlenderImporter::InternReadFile(std::__1::basic_string<char,  std::__1::char_traits<char>, std::__1::allocator<char> > const&, aiScene*, Assimp::IOSystem*) in libassimp.a(BlenderLoader.cpp.o)
  Assimp::XFileParser::XFileParser(std::__1::vector<char, std::__1::allocator<char> > const&) in libassimp.a(XFileParser.cpp.o)
  _unzReadCurrentFile in libassimp.a(unzip.c.o)
 "_inflateEnd", referenced from:
  Assimp::XGLImporter::InternReadFile(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, aiScene*, Assimp::IOSystem*) in libassimp.a(XGLLoader.cpp.o)
  Assimp::BlenderImporter::InternReadFile(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, aiScene*, Assimp::IOSystem*) in libassimp.a(BlenderLoader.cpp.o)
  Assimp::XFileParser::XFileParser(std::__1::vector<char, std::__1::allocator<char> > const&) in libassimp.a(XFileParser.cpp.o)
  _unzCloseCurrentFile in libassimp.a(unzip.c.o)
  "_inflateInit2_", referenced from:
  Assimp::XGLImporter::InternReadFile(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, aiScene*, Assimp::IOSystem*) in libassimp.a(XGLLoader.cpp.o)
  Assimp::BlenderImporter::InternReadFile(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, aiScene*, Assimp::IOSystem*) in libassimp.a(BlenderLoader.cpp.o)
  Assimp::XFileParser::XFileParser(std::__1::vector<char, std::__1::allocator<char> > const&) in libassimp.a(XFileParser.cpp.o)
  _unzOpenCurrentFile3 in libassimp.a(unzip.c.o)
  "_inflateReset", referenced from:
  Assimp::XFileParser::XFileParser(std::__1::vector<char, std::__1::allocator<char> > const&) in libassimp.a(XFileParser.cpp.o)
  "_inflateSetDictionary", referenced from:
  Assimp::XFileParser::XFileParser(std::__1::vector<char, std::__1::allocator<char> >  const&) in libassimp.a(XFileParser.cpp.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

我最近遇到了同样的问题。我的实际解决方案是确保我使用编译后的 libassimp.a 的项目也链接到 libz.dylib 而不是将 assimp 转换为 .dylib。