Undefined Symbol C Shared Library, not wish any undefined symbols from the plugin framework to be resolved to plugin symbols. The solution of this error would be either to define undefined_function in main. Linux shared library that uses a shared library undefined symbol Asked 15 years, 10 months ago Modified 10 years, 10 months ago Viewed 72k times 使用 C/C++ 程式分成三個步驟: 編譯 (compile) → 連結 (link) → 執行 (載入 symbol)。了解每個階段的行為，才知道如何處理該階段的 undefined Master C++ linker errors! This deep dive covers 30+ causes and solutions for 'undefined reference' and 'unresolved external symbol' errors, including code examples, linking strategies, and For example, if porting an application that uses the NI-IMAQ driver you need to add this library by selecting Edit >> Add Files to Project >> Library But when I load library simply by commenting above code and exporting library path everything works like charm. so with -Wl,--no-undefined option It should give you an error if you missed to define some symbol. That way, any missing dependencies will be reported at link time, . lld: error: undefined symbol: my_class::print_a_dot () Can anyone suggest After more research, I realized what way the stuff works. 0. 0, which is typically a convention for Fix the link errors one at a time, identifying the missing library and adding it until linking succeeds. There are two linker options to manipulate undefined symbols of shared libraries: First one is --no-undefined. so It will list all shared libraries which this library needs. so. Cheers, Axel. The executable is named liblexbor. When I compile, I get ld. In this blog, we’ll demystify the "undefined symbol" error, explore its root causes, and walk through step-by-step debugging techniques to get your dlopen() call working smoothly. c, to compile with another C file that has the definition of undefined_function, or to link with a library that has In nm output, it’s shown once as “in the text (code) section” and once as “undefined”. When linking B_shared. If the library is found but some of the symbols are missing, try building libb. I don’t understand what the letters after the function name mean exactly and why they differ. Include header file and compile In my program I need to load a shared library dynamically with dlopen(). h template <class The point is to expose the functionality of my classes (here just minimal toy classes as an example) as a simple C API with the three functions init, cleanup, and bar. I've condensed the problem to about 20 lines of code. It reports the unresolved symbols The source for the library can declare a symbol without defining it, by doing something like this extern InvalidateImage(const char *); and later using it const char *foo = CMake: undefined symbol when linking an executable with an OBJECT target which linked to a Shared Library Ask Question Asked 4 years, 4 months ago Modified 4 years, 4 months ago Learn effective techniques to diagnose and resolve undefined symbol errors in C++ programming, covering linking issues, compilation strategies, and debugging However, this results in undefined symbols when building in MSVC. The naming of your shared library and executable seems to be mixed. dll, I get unresolved external dependencies on global variables that were defined in > 5. I would like to build an executable binary file that should be only linked against libnew. Another use is to load the same