Makefile works on OS X but not on Ubuntu

Question

I was wondering if StackOverflow could help me out today! So I am currently finishing up a project in C for one of my CS courses at Uni and I am running into a funny problem. When I use the commands 'make' and 'make test' on my OSX environment it runs just fine, but when I test it on a Ubuntu Virtual Machine, it gives me these errors:

make: prim:Command not found

makefile:32: recipe for target 'test failed.

make: ***[test] Error 127

Here is my makefile code below, any help is appreciated.

OBJS = main.o scanner.o AM.o binheap.o CDLL.o node.o prim.o vertex.o
OPTS = -Wall -Wextra -g -std=c99

main : $(OBJS)
    gcc $(OPTS) $(OBJS) -o prim -lm

main.o : main.c scanner.h AM.h binheap.h CDLL.h node.h prim.h vertex.h
    gcc $(OPTS) -c main.c

scanner.o : scanner.c scanner.h
    gcc $(OPTS) -c scanner.c

node.o : node.c node.h
    gcc $(OPTS) -c node.c

AM.o : AM.c AM.h
    gcc $(OPTS) -c AM.c

prim.o : prim.c prim.h
    gcc $(OPTS) -c prim.c

binheap.o : binheap.c binheap.h
    gcc $(OPTS) -c binheap.c
CDLL.o : CDLL.c CDLL.h
    gcc $(OPTS) -c CDLL.c

vertex.o : vertex.c vertex.h
    gcc $(OPTS) -c vertex.c

test: prim
     @echo ###############################
     @echo TESTING GRAPH1.TXT
     @echo prim graph1.txt
     @echo ###############################
     prim graph1.txt
     @echo ###############################
     @echo TESTING GRAPH2.TXT
     @echo prim graph2.txt
     @echo ###############################
     prim graph2.txt
     @echo ###############################

clean :
    rm -f $(OBJS) main

Answer 1

I think you want to change this:

main : $(OBJS)
    gcc $(OPTS) $(OBJS) -o prim -lm

to:

prim : $(OBJS)
    gcc $(OPTS) $(OBJS) -o prim -lm

Also, unless prim is somehow on the path, your shell won't find it. It's probably better to write test rule as:

test: prim
     @echo ###############################
     @echo TESTING GRAPH1.TXT
     @echo prim graph1.txt
     @echo ###############################
     ./prim graph1.txt
     @echo ###############################
     @echo TESTING GRAPH2.TXT
     @echo prim graph2.txt
     @echo ###############################
     ./prim graph2.txt
     @echo ###############################

Answer 2

make: prim:Command not found

That error message tells you what's wrong. prim can't be found in PATH on Ubuntu. Assuming prim is the program you just built in the local directory, you should be running ./prim in your Makefile.