merging Allegro, C, and Make

[dave_567]

:confused:

This is something simple, but I'm just not getting it. I'm trying to compile one of the allegro examples and I keep getting errors to many undefined references. I can't figure out why the library is not linking properly.

The precompiled version fo the example works. So I think all system configurations re OK.

Here is the makefile and some of thelong list of errors. Any ideas? ](*,)

# default compiler
CC=gcc

# define object files
my_objects = ex3d.o

# define source files
my_source = ex3d.c

# Linking object files
allegtest: $(my_objects)
$(CC) -o allegtest $(my_objects) -lalleg
echo ~~~~ sample: creating executble file

# Compiling source files
ex3d.o: $(my_source)
$(CC) -c $(my_source)
echo ~~~~ sample: creating object files

# Removing the executable and the object files
clean:
rm *.o
echo ~~~~~~~~~ clean: make complete


dave@ubuntu:~/Code/SystemWars/Code02$ make
gcc -o allegtest ex3d.o -lalleg
/usr/lib/gcc/x86_64-linux-gnu/4.0.2/../../../../lib64/liballeg.a(color.o): In function `hsv_to_rgb':
: undefined reference to `fmod'
/usr/lib/gcc/x86_64-linux-gnu/4.0.2/../../../../lib64/liballeg.a(gfx.o): In function `do_arc':
: undefined reference to `cos'
/usr/lib/gcc/x86_64-linux-gnu/4.0.2/../../../../lib64/liballeg.a(gfx.o): In function `do_arc':
: undefined reference to `sin'
/usr/lib/gcc/x86_64-linux-gnu/4.0.2/../../../../lib64/liballeg.a(gfx.o): In function `do_arc':
: undefined reference to `cos'
/usr/lib/gcc/x86_64-linux-gnu/4.0.2/../../../../lib64/liballeg.a(gfx.o): In function `do_arc':
: undefined reference to `sin'
/usr/lib/gcc/x86_64-linux-gnu/4.0.2/../../../../lib64/liballeg.a(math.o): In function `fixhypot':
: undefined reference to `hypot'
/usr/lib/gcc/x86_64-linux-gnu/4.0.2/../../../../lib64/liballeg.a(math3d.o): In function `get_x_rotate_matrix_f':
: undefined reference to `cos'
/usr/lib/gcc/x86_64-linux-gnu/4.0.2/../../../../lib64/liballeg.a(math3d.o): In function `get_x_rotate_matrix_f':
: undefined reference to `sin'
/usr/lib/gcc/x86_64-linux-gnu/4.0.2/../../../../lib64/liballeg.a(math3d.o): In function `get_y_rotate_matrix_f':

[hod139]

All the undefines appear to be from the math library. You can try adding

-lm
to link against the math libs. Hopefully that works.

[dave_567]

No luck. Now it misses all the references.



# default compiler
CC=gcc

# define object files
my_objects = ex3d.o

# define source files
my_source = ex3d.c

# Linking object files
allegtest: $(my_objects)
$(CC) -o allegtest $(my_objects) -lmalleg
echo ~~~~ sample: creating executble file

# Compiling source files
ex3d.o: $(my_source)
$(CC) -c $(my_source)
echo ~~~~ sample: creating object files

# Removing the executable and the object files
clean:
rm *.o
echo ~~~~~~~~~ clean: make complete



dave@ubuntu:~/Code/SystemWars/Code02$ make
gcc -o allegtest ex3d.o -lmalleg
/usr/bin/ld: cannot find -lmalleg
collect2: ld returned 1 exit status
make: *** [allegtest] Error 1
dave@ubuntu:~/Code/SystemWars/Code02$

[hod139]

# Linking object files
allegtest: $(my_objects)
$(CC) -o allegtest $(my_objects) -lmalleg
echo ~~~~ sample: creating executble file

This is wrong. Try


$(CC) -o allegtest $(my_objects) -lm -lalleg