即使nm报告存在符号，运行时符号查找错误 [英] Symbol lookup error at runtime even though nm reports symbol present

问题描述

我这样构建程序:

g++ -std=c++11 myprog.cpp -o myprog -lqpid-proton-cpp

然后我运行./myprog并收到此错误:

Then I run ./myprog and get this error:

symbol lookup error: ./myprog: undefined symbol: _ZN6proton10event_loop6injectESt8functionIFvvEE

但是，nm报告该库中存在该符号. .

Yet, nm reports the symbol is present in the library . . .

nm -D /usr/lib/libqpid-proton-cpp.so | grep _ZN6proton10event_loop6injectESt8functionIFvvEE

. . .产量:

000000000002f460 T _ZN6proton10event_loop6injectESt8functionIFvvEE

我在这里想念什么?

推荐答案

例如，您是否使用ldd myprog验证了自己是否查看了正确的共享库?有可能找到其他共享对象.

Did you verify, e.g., using ldd myprog, that you looked at the correct shared object? There is a chance a different shared object is found.

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