gcc -c lib.c
ar -r libmy1.a lib.o
Windows
gcc -o prog1 main.c -L ./ c:\geekbrains.ru\Projects\C\MIPI_AC_Git\MIPI_AdvancedC\Lect3\35\libmy1.a
Linux
gcc -o prog2 main.c -L ./ -lmy2 -rpath /home/user/mylib2/