$ ls
a.c  address_example*  address_example.c  b.c  c.c  d.c  Makefile

$ gcc a.c b.c -o force_ld_error
b.c: In function ‘main’:
b.c:17:6: warning: assignment to ‘int *’ from ‘int’ makes pointer from integer w-Wint-conversion]
  a_n = 888;    // Set a_n to 888.
      ^
/tmp/ccGPsJCh.o: In function `main':
/web/groups/ece264/23sp/lecture/20230214/snippets/b.c:6: multiple definition of
/tmp/ccoRKkUg.o:/web/groups/ece264/23sp/lecture/20230214/snippets/a.c:6: first d
collect2: error: ld returned 1 exit status

$ gcc -c a.c

$ ls
a.c  address_example*  address_example.c  a.o  b.c  c.c  d.c  Makefile

$ gcc -c c.c

$ gcc a.c c.c -o force_ld_error
/tmp/ccTv014S.o: In function `main':
/web/groups/ece264/23sp/lecture/20230214/snippets/c.c:6: multiple definition of
/tmp/ccu5wcEA.o:/web/groups/ece264/23sp/lecture/20230214/snippets/a.c:6: first d
collect2: error: ld returned 1 exit status

$ # You probably never need -c in ECE 26400.  It creates an object file (.o) for

$ c3m

$ gcc  address_example.c   -o address_example

$ gcc  -o address_example   address_example.c

$ gcc   -o address_example   address_example.c

$ #  DANGER!!!  #   gcc -o test_mintf.c mintf.c

$ #  DANGER!!!  #   gcc   -o test_mintf.c   mintf.c

$ #  GOOD  #   gcc   mintf.c test_mintf.c  -o test_mintf

$ gcc   address_example.c  -o
gcc: error: missing filename after ‘-o’

$ gcc   address_example.c

$ ls
address_example*  address_example.c  a.out*  Makefile