undefined reference to `pthread_key_create' (linker error)

Question

I have downloaded gtest 1.7.0 sources from here:

https://code.google.com/p/googletest/downloads/list

and build the gtest .a files (lib files) on ubuntu 13.10

Answer 1

The option -lgtest is attempting to link the dynamic library libgtest.so. You wish to link the static library /home/user/gtest-1.7.0/lib/.libs/libgtest.a.

Instead of:

g++ main.cpp -I/home/user/gtest-1.7.0/include -L/home/user/gtest-1.7.0/lib/.libs -lgtest -pthread

use:

g++ main.cpp -I/home/user/gtest-1.7.0/include /home/user/gtest-1.7.0/lib/.libs/libgtest.a -pthread

Note that your commandline supplies no name for the resulting executable, which will default to a.out. If you want it called, e.g. mytest, then do:

g++ -o mytest main.cpp -I/home/user/gtest-1.7.0/include /home/user/gtest-1.7.0/lib/.libs/libgtest.a -pthread