How to use the fmt library without getting “Undefined symbols for architecture x86_64”

Question

I\'m trying to use the fmt (https://github.com/fmtlib/fmt) formatting header library in my c++ project.

I\'ve added the path to the core header file at the top of my ma

Answer 1

You should link with the fmt library or use the optional header-only mode.

For example, if you have the file test.cc:

#include <fmt/core.h>

int main() {
  fmt::print("The answer is {}.", 42);
}

You can compile and link it with gcc:

g++ -std=c++11 test.cc -lfmt