问题描述
我正在尝试运行libpqxx，但是在尝试构建项目时遇到了一些困难。
我安装了Windows10 64位，Postgresql 13，CMake 3.18.4，下载了最新的libpqxx源，今天也刚刚更新了我的整个Visual Studio 17。
尝试在shell中运行它给了我
C:\Users\xxx\Documents\Programmieren\C++\Libraries>cmake -S libpqxx-master -B build -DCMAKE_INSTALL_PREFIX="libpqxx"
-- Building for: Visual Studio 15 2017
-- Selecting Windows SDK version 10.0.17763.0 to target Windows 10.0.19041.
-- The CXX compiler identification is MSVC 19.16.27043.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Enterprise/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x86/cl.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found Postgresql: C:/Program Files/Postgresql/13/lib/libpq.lib (found version "13.0")
-- Looking for poll
-- Looking for poll - not found
-- Looking for PQencryptPasswordConn
-- Looking for PQencryptPasswordConn - not found
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Generating config.h
-- Generating config.h - done
-- Configuring done
-- Generating done
-- Build files have been written to: C:/Users/xxx/Documents/Programmieren/C++/Libraries/build
我在Windows / system32和Windows / sysWOW64中添加了libpq.dll，当我尝试注册它们时，出现错误消息，找不到入口点。我认为它不必注册就可以运行，对吗？
就我而言，Poll是libpq中的一个类，而PQencryptPasswordConn是libpq中的一个函数，不知道它们是否丢失，以及在哪里丢失以及如何从此处解决。
运行后： cmake -S libpqxx-master -B build -DCMAKE_INSTALL_PREFIX =“ libpqxx”
然后 cmake --build build --target安装
通过外壳并获得了大量未解决的外部错误，这只是一小部分演示，我认为这是来自libpq.dll的问题，因为它找不到先前的内容。
pqxx.lib(largeobject.obj) : error LNK2019: Unresolved external symbol "_lo_export" in function ""public: void __thiscall pqxx::largeobject::to_file(class pqxx::dbtransaction &,class std::basi
c_string_view<char,struct std::char_traits<char> >)const " (?to_file@largeobject@pqxx@@QBEXAAVdbtransaction@2@V?$basic_string_view@DU?$char_traits@D@std@@@std@@@Z)". [C:\Users\xxx\Documents\Programmieren\C++\
Libraries\build\test\runner.vcxproj]
pqxx.lib(util.obj) : error LNK2019: Unresolved external symbol "_PQisthreadsafe" in function ""struct pqxx::thread_safety_model __cdecl pqxx::describe_thread_safety(void)" (?describe_thread_s
afety@pqxx@@YA?AUthread_safety_model@1@XZ)". [C:\Users\xxx\Documents\Programmieren\C++\Libraries\build\test\runner.vcxproj]
pqxx.lib(encodings.obj) : error LNK2019: Unresolved external symbol "_pg_encoding_to_char" in function ""char const * __cdecl pqxx::internal::name_encoding(int)" (?name_encoding@internal@pqxx
@@YAPBDH@Z)". [C:\Users\xxx\Documents\Programmieren\C++\Libraries\build\test\runner.vcxproj]
C:\Users\xxx\Documents\Programmieren\C++\Libraries\build\test\Debug\runner.exe : Fatal error LNK1120: 70 unresolved externals [C:\Users\xxx\Documents\Programmieren\C++\Libraries\build\test\runner.vcxpro
j]
非常感谢！
解决方法
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