building C apps 02. hello multifile

cretate a header file for the library functions
add : #include “hello-lib-1.h” to the main program
(not #include that syntax is for native C libraies , the “filename” is for file libraries )

zie code

gcc -c hello2.c
gcc -c hello-lib-1.c
gcc hello2.o  hello-lib-1.o  -o hello2.bin