undefined reference to `__stack_chk_fail’

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

A few things come to mind:

  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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