If you are following along with gcc on Linux and continuing to get linker errors even after adding -lfreetype, try passing it as the very last argument, e.g.

If you are following along with gcc on Linux and continuing to get linker errors even after adding -lfreetype, try passing it as the very last argument, e.g. gcc `pkg-config --cflags freetype2` -Wall -Werror -o main main.c -lfreetype