Eclipse CDT 中未解析的外部符号

Question

我尝试使用 eclipse cdt 构建 cpp 文件。链接器抛出“无法解析的外部符号”，但是包含函数实现的 lib 文件的路径列在 Project Properties->C/C++ Build->Environment 上的 LIB 环境变量中

我做错了什么？

UPD 我尝试构建 文件。路径 C:\Program Files\Microsoft SDKs\Windows\v7.0A\Lib\ 上有 lib RpcRT4.Lib

并且链接器失败：

**** Build of configuration Debug for project test cpp ****

**** Internal Builder is used for build               ****
link /debug /nologo /OUT:test cpp.exe main.obj
main.obj : error LNK2019: unresolved external symbol __imp__RpcStringFreeA@4 referenced in function "bool __cdecl Initialize_CreateWindowClass(void)"(?Initialize_CreateWindowClass@@YA_NXZ)
main.obj : error LNK2019: unresolved external symbol __imp__RegisterClassA@4 referenced in function "bool __cdecl Initialize_CreateWindowClass(void)" (?Initialize_CreateWindowClass@@YA_NXZ)
main.obj : error LNK2019: unresolved external symbol __imp__UuidToStringA@8 referenced in function "bool __cdecl Initialize_CreateWindowClass(void)" (?Initialize_CreateWindowClass@@YA_NXZ)
main.obj : error LNK2019: unresolved external symbol __imp__UuidCreate@4 referenced in function "bool __cdecl Initialize_CreateWindowClass(void)" (?Initialize_CreateWindowClass@@YA_NXZ)
main.obj : error LNK2019: unresolved external symbol __imp__DefWindowProcA@16 referenced in function "long __stdcall SkypeAPITest_Windows_WindowProc(struct HWND__ *,unsigned int,unsigned int,long)" (?SkypeAPITest_Windows_WindowProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__PostQuitMessage@4 referenced in function "long __stdcall SkypeAPITest_Windows_WindowProc(struct HWND__ *,unsigned int,unsigned int,long)" (?SkypeAPITest_Windows_WindowProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__UnregisterClassA@8 referenced in function "void __cdecl DeInitialize_DestroyWindowClass(void)" (?DeInitialize_DestroyWindowClass@@YAXXZ)
main.obj : error LNK2019: unresolved external symbol __imp__CreateWindowExA@48 referenced in function "bool __cdecl Initialize_CreateMainWindow(void)" (?Initialize_CreateMainWindow@@YA_NXZ)
main.obj : error LNK2019: unresolved external symbol __imp__DestroyWindow@4 referenced in function "void __cdecl DeInitialize_DestroyMainWindow(void)" (?DeInitialize_DestroyMainWindow@@YAXXZ)
main.obj : error LNK2019: unresolved external symbol __imp__DispatchMessageA@4 referenced in function "void __cdecl Global_MessageLoop(void)" (?Global_MessageLoop@@YAXXZ)
main.obj : error LNK2019: unresolved external symbol __imp__TranslateMessage@4 referenced in function "void __cdecl Global_MessageLoop(void)" (?Global_MessageLoop@@YAXXZ)
main.obj : error LNK2019: unresolved external symbol __imp__GetMessageA@16 referenced in function "void __cdecl Global_MessageLoop(void)" (?Global_MessageLoop@@YAXXZ)
main.obj : error LNK2019: unresolved external symbol __imp__PostMessageA@16 referenced in function "void __cdecl Global_InputProcessingThread(void *)" (?Global_InputProcessingThread@@YAXPAX@Z)
main.obj : error LNK2019: unresolved external symbol __imp__SendMessageA@16 referenced in function "void __cdecl Global_InputProcessingThread(void *)" (?Global_InputProcessingThread@@YAXPAX@Z)
main.obj : error LNK2019: unresolved external symbol __imp__RegisterWindowMessageA@4 referenced in function _main
test cpp.exe : fatal error LNK1120: 15 unresolved externals
Build error occurred, build is stopped
Time consumed: 2438  ms.  

以及项目的环境设置

Answer 1

我不完全清楚您是否已经根据问题完成了此操作，但仅将目录添加到链接器的搜索路径对于我曾经使用过的任何编译器/链接器来说是不够的。其中可能有数百个不同的库，甚至是同一库的不同版本，并且链接器不知道您想要哪些和不想要哪些。您需要明确地告诉它使用适当的参数链接到库。

看起来您正在使用 Microsoft 链接器，我从未使用过它，所以我无法帮助您了解特定的标志，但如果这是问题所在，应该很容易在文档中找到它是什么。我认为 Eclipse 也有一种在 GUI 中指定这一点的方法，该方法在它支持的各种编译器中应该是通用的。