对 `__stack_chk_fail' 的未定义引用

undefined reference to `__stack_chk_fail#39;(对 `__stack_chk_fail 的未定义引用)

问题描述

编译 C++ 代码时出现此错误:

Getting this error while compiling C++ code:

undefined reference to `__stack_chk_fail'

已经尝试过的选项:

1. 在编译时添加了 -fno-stack-protector - 不起作用，错误仍然存​​在
2. 在我的代码中添加了 void __stack_chk_fail(void) 的虚拟实现.仍然出现同样的错误.

详细错误:

/u/ac/alanger/gurobi/gurobi400/linux64/lib/libgurobi_c++.a(Env.o)(.text+0x1034): In function `GRBEnv::getPar/u/ac/alanger/gurobi/gurobi400/linux64/lib/libgurobi_c++.a(Env.o)(.text+0x1034): In function `GRBEnv::getParamInfo(GRB_StringParam, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&)':
: undefined reference to `__stack_chk_fail'
amInfo(GRB_StringParam, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&)':
: **undefined reference to `__stack_chk_fail'**

早些时候，我收到了 10 个这样的错误.发现我使用的预编译库的 gcc 和我用来编译代码的 gcc 版本之间存在版本不匹配.更新了 gcc，现在我只收到了其中的 2 个错误.

Earlier, I was getting 10's of such errors. Found out that there was a version mismatch between the gcc of the pre-compiled libraries I am using and the gcc version I was using to compile the code. Updated gcc and now I am getting only 2 of these errors.

有什么帮助吗?

推荐答案

libgurobi_c++.a 是用 -fno-stack-protector 编译的(显然).

libgurobi_c++.a was compiled with -fno-stack-protector (obviously).

想到一些事情:

1. 在链接时添加 -fstack-protector.这将确保 libssp 被链接.
2. 手动链接-lssp
3. 在它自己的目标文件中制作 __stack_chk_fail(void) 的虚拟版本，然后将此 .o 文件添加到您的链接器命令 AFTER libgurobi_c++.a.GCC/G++ 在链接期间从左到右解析符号，因此尽管您的代码定义了函数，但包含 __stack_chk_fail 符号的对象的副本需要位于 libgurobi_c++.a 右侧的链接器行上.

1. add -fstack-protector when linking. This will make sure that libssp gets linked.
2. Manually link -lssp
3. Make your dummy version of __stack_chk_fail(void) in it's own object file and and add this .o file to your linker command AFTER libgurobi_c++.a. GCC/G++ resolves symbols from left to right during linking so despite your code having the function defined, a copy of an object containing the __stack_chk_fail symbol needs to be on the linker line to the right of libgurobi_c++.a.

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