C++ 无法使用snappy支持编译leveldb

我试图在mac os x high sierra上构建支持压缩的应用程序，以供以后在XCode项目中使用。我正在浏览自述文件中描述的两个项目的标准编译过程。这包括通过

cmake

为两个项目构建项目。在

snappy

project的情况下，程序是平滑的，所有的构建和安装都是完美的。但是，对于

leveldb

，我无法使

cmake

找到以前通过

makeinstall

安装的

snappy

库。我不知道如何调试

cmake

并找到它查找库的位置

感谢您的帮助

以下是两个版本的结果：

---

编辑

这是一个输出，似乎/usr/local/lib在列表中

---

另一次编辑

我已经尝试运行

cc-DCHECK\u FUNCTION\u EXISTS=snapy\u compress-Wl，-search\u paths\u first-Wl，-headerpad\u max\u install\u names-o check\u snapy\u exist CheckFunctionExists.c-lsnappy

按照

sel fish

提供的解决方案运行。但如果失败，则输出如下：

Undefined symbols for architecture x86_64:
  "std::__1::__vector_base_common<true>::__throw_length_error() const", referenced from:
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
  "std::logic_error::logic_error(char const*)", referenced from:
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
  "std::length_error::~length_error()", referenced from:
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
  "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::resize(unsigned long, char)", referenced from:
      snappy::Uncompress(char const*, unsigned long, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*) in libsnappy.a(snappy.cc.o)
      snappy::Compress(char const*, unsigned long, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*) in libsnappy.a(snappy.cc.o)
  "std::terminate()", referenced from:
      ___clang_call_terminate in libsnappy.a(snappy.cc.o)
  "typeinfo for std::length_error", referenced from:
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
  "vtable for __cxxabiv1::__class_type_info", referenced from:
      typeinfo for snappy::Sink in libsnappy.a(snappy-sinksource.cc.o)
      typeinfo for snappy::Source in libsnappy.a(snappy-sinksource.cc.o)
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for __cxxabiv1::__si_class_type_info", referenced from:
      typeinfo for snappy::ByteArraySource in libsnappy.a(snappy-sinksource.cc.o)
      typeinfo for snappy::UncheckedByteArraySink in libsnappy.a(snappy-sinksource.cc.o)
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for std::length_error", referenced from:
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "operator delete[](void*)", referenced from:
      snappy::Compress(snappy::Source*, snappy::Sink*) in libsnappy.a(snappy.cc.o)
      snappy::SnappySinkAllocator::Deleter(void*, char const*, unsigned long) in libsnappy.a(snappy.cc.o)
  "operator delete(void*)", referenced from:
      snappy::UncompressAsMuchAsPossible(snappy::Source*, snappy::Sink*) in libsnappy.a(snappy.cc.o)
      snappy::Uncompress(snappy::Source*, snappy::Sink*) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
      snappy::ByteArraySource::~ByteArraySource() in libsnappy.a(snappy-sinksource.cc.o)
      snappy::UncheckedByteArraySink::~UncheckedByteArraySink() in libsnappy.a(snappy-sinksource.cc.o)
  "operator new[](unsigned long)", referenced from:
      snappy::internal::WorkingMemory::GetHashTable(unsigned long, int*) in libsnappy.a(snappy.cc.o)
      snappy::Compress(snappy::Source*, snappy::Sink*) in libsnappy.a(snappy.cc.o)
      snappy::SnappyScatteredWriter<snappy::SnappySinkAllocator>::SlowAppend(char const*, unsigned long) in libsnappy.a(snappy.cc.o)
  "operator new(unsigned long)", referenced from:
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
  "___cxa_allocate_exception", referenced from:
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
  "___cxa_begin_catch", referenced from:
      ___clang_call_terminate in libsnappy.a(snappy.cc.o)
  "___cxa_free_exception", referenced from:
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
  "___cxa_pure_virtual", referenced from:
      vtable for snappy::Sink in libsnappy.a(snappy-sinksource.cc.o)
      vtable for snappy::Source in libsnappy.a(snappy-sinksource.cc.o)
  "___cxa_throw", referenced from:
      void std::__1::vector<snappy::SnappySinkAllocator::Datablock, std::__1::allocator<snappy::SnappySinkAllocator::Datablock> >::__push_back_slow_path<snappy::SnappySinkAllocator::Datablock const>(snappy::SnappySinkAllocator::Datablock const&) in libsnappy.a(snappy.cc.o)
      void std::__1::vector<char*, std::__1::allocator<char*> >::__push_back_slow_path<char* const>(char* const&) in libsnappy.a(snappy.cc.o)
  "___gxx_personality_v0", referenced from:
      snappy::GetUncompressedLength(snappy::Source*, unsigned int*) in libsnappy.a(snappy.cc.o)
      snappy::Compress(snappy::Source*, snappy::Sink*) in libsnappy.a(snappy.cc.o)
      snappy::RawUncompressToIOVec(char const*, unsigned long, iovec const*, unsigned long) in libsnappy.a(snappy.cc.o)
      snappy::RawUncompressToIOVec(snappy::Source*, iovec const*, unsigned long) in libsnappy.a(snappy.cc.o)
      snappy::RawUncompress(char const*, unsigned long, char*) in libsnappy.a(snappy.cc.o)
      snappy::RawUncompress(snappy::Source*, char*) in libsnappy.a(snappy.cc.o)
      snappy::Uncompress(char const*, unsigned long, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*) in libsnappy.a(snappy.cc.o)
      ...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

架构x86_64的未定义符号： “标准：：_1:：_向量u基u公共：：_抛出u长度u错误（）常量”，引用自： libsnappy.a（snappy.cc.o）中的void std:：\uuuuuuuu 1:：vector:：\uuuuu push\u back\u slow\u路径（snappy:：snappysinklocator:：Datablock const&） void std:：_1:：vector:：_push_back_slow_path（char*const&）在libsnappy.a（snappy.cc.o）中 “标准：：逻辑错误：：逻辑错误（字符常量*）”，引用自： libsnappy.a（snappy.cc.o）中的void std:：\uuuuuuuu 1:：vector:：\uuuuu push\u back\u slow\u路径（snappy:：snappysinklocator:：Datablock const&） void std:：_1:：vector:：_push_back_slow_path（char*const&）在libsnappy.a（snappy.cc.o）中 “std:：length_error:：~length_error（）”，引用自： libsnappy.a（snappy.cc.o）中的void std:：\uuuuuuuu 1:：vector:：\uuuuu push\u back\u slow\u路径（snappy:：snappysinklocator:：Datablock const&） void std:：_1:：vector:：_push_back_slow_path（char*const&）在libsnappy.a（snappy.cc.o）中 “std:：_1:：基本_字符串：：调整大小（无符号长，字符）”，引用自： libsnappy.a（snappy.cc.o）中的snappy:：解压缩（char const*，unsigned long，std:：uuu 1:：basic_string*） libsnappy.a（snappy.cc.o）中的snappy:：Compress（char const*，unsigned long，std:：\uuuu 1:：basic\u string*） “std:：terminate（）”，引用自： ___clang_call_终止于libsnapy.a（snappy.cc.o） “std的类型信息：：长度错误”，引用自： libsnappy.a（snappy.cc.o）中的void std:：\uuuuuuuu 1:：vector:：\uuuuu push\u back\u slow\u路径（snappy:：snappysinklocator:：Datablock const&） void std:：_1:：vector:：_push_back_slow_path（char*const&）在libsnappy.a（snappy.cc.o）中 “vtable for _cxxabiv1:：_class_type_info”，引用自： libsnappy.a（snappy sinksource.cc.o）中snappy:：Sink的类型信息 libsnappy.a（snappy sinksource.cc.o）中snappy:：Source的类型信息 注意：缺少vtable通常意味着第一个非内联虚拟成员函数没有定义。 “vtable for uuu cxxabiv1:：uu si_class_type_info”，引用自： libsnappy.a（snappy sinksource.cc.o）中snappy:：ByteArraySource的类型信息 snappy的类型信息：：在libsnappy.a（snappy sinksource.cc.o）中取消选中DbyteArraySink 注意：缺少vtable通常意味着第一个非内联虚拟成员函数没有定义。 “vtable for std:：length_error”，引用自： libsnappy.a（snappy.cc.o）中的void std:：\uuuuuuuu 1:：vector:：\uuuuu push\u back\u slow\u路径（snappy:：snappysinklocator:：Datablock const&） void std:：_1:：vector:：_push_back_slow_path（char*const&）在libsnappy.a（snappy.cc.o）中 注意：缺少vtable通常意味着第一个非内联虚拟成员函数没有定义。 “运算符删除[]（void*）”，引用自： libsnappy.a（snappy.cc.o）中的snappy:：Compress（snappy:：Source*，snappy:：Sink*） libsnappy.a（snappy.cc.o）中的snappy:：snappysinklocator:：Deleter（void*，char const*，unsigned long） “运算符删除（void*）”，引用自： libsnappy.a（snappy.cc.o）中的snappy:：uncompressasmuchs可能（snappy:：Source*，snappy:：Sink*） libsnappy.a（snappy.cc.o）中的snappy:：解压缩（snappy:：Source*，snappy:：Sink*） libsnappy.a（snappy.cc.o）中的void std:：\uuuuuuuu 1:：vector:：\uuuuu push\u back\u slow\u路径（snappy:：snappysinklocator:：Datablock const&） void std:：_1:：vector:：_push_back_slow_path（char*const&）在libsnappy.a（snappy.cc.o）中 libsnapy.a（snapy sinksource.cc.o）中的snapy:：ByteArraySource:：~ByteArraySource（） snappy:：UncheckedByteArraySink:：~UncheckedByteArraySink（）在libsnapy.a（snappy sinksource.cc.o）中 “运算符新[]（无符号长）”引用自： libsnappy.a（snappy.cc.o）中的snappy:：internal:：WorkingMemory:：GetHashTable（unsigned long，int*） libsnappy.a（snappy.cc.o）中的snappy:：Compress（snappy:：Source*，snappy:：Sink*） libsnappy.a（snappy.cc.o）中的snappy:：SnappyScatteredWriter:：SlowAppend（char const*，unsigned long） “运算符新（无符号长）”引用自： libsnappy.a（snappy.cc.o）中的void std:：\uuuuuuuu 1:：vector:：\uuuuu push\u back\u slow\u路径（snappy:：snappysinklocator:：Datablock const&） void std:：_1:：vector:：_push_back_slow_path（char*const&）在libsnappy.a（snappy.cc.o）中 “\uuuuuuuucxa\u分配\u异常”，引用自： libsnappy.a（snappy.cc.o）中的void std:：\uuuuuuuu 1:：vector:：\uuuuu push\u back\u slow\u路径（snappy:：snappysinklocator:：Datablock const&） void std:：_1:：vector:：_push_back_slow_path（char*const&）在libsnappy.a（snappy.cc.o）中 “\uuuuuuuucxa\u begin\u catch”，引用自： ___clang_call_终止于libsnapy.a（snappy.cc.o） “\uuuuuuuuucxa\u free\u异常”，引用自： libsnappy.a（snappy.cc.o）中的void std:：\uuuuuuuu 1:：vector:：\uuuuu push\u back\u slow\u路径（snappy:：snappysinklocator:：Datablock const&） void std:：_1:：vector:：_push_back_slow_path（char*const&）在libsnappy.a（snappy.cc.o）中 “\uuuuuuuucxa\upure\u virtual”，引用自： snappy:：l中的接收器的vtable

clang -Xlinker -v

@(#)PROGRAM:ld  PROJECT:ld64-278.4
configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em (tvOS)
Library search paths:
    /usr/lib
    /usr/local/lib

cmake --debug-output --trace --debug-trycompile ..

check_library_exists(snappy snappy_compress "" HAVE_SNAPPY)

cc  -DCHECK_FUNCTION_EXISTS=snappy_compress -Wl,-search_paths_first -Wl,-headerpad_max_install_names -o check_snappy_exist CheckFunctionExists.c -lsnappy