/in/foo.c: In function 'main':
/in/foo.c:5:5: warning: implicit declaration of function 'print' [-Wimplicit-function-declaration]
     print(":");
     ^~~~~
/tmp/ccpLJJgb.o: In function `main':
foo.c:(.text.startup+0xe): undefined reference to `print'
collect2: error: ld returned 1 exit status