Smpeg MMX asm compilation (problem)

[Matt]

Alright, I've managed to get both .S files to compile- however when I 
try to link them with a program using:
extern "C" {
extern unsigned int cpu_flags(void);
extern void IDCT_mmx(DCTBLOCK data);
}

The linker tool comes up with
./.libs/libsmpeg.a(parseblock.o): In function `Z8InitIDCTv':
e:/programming/smpeg/video/parseblock.cpp:117: undefined reference to 
`cpu_flags()'
./.libs/libsmpeg.a(parseblock.o): In function 
`Z15ParseReconBlockiP10vid_stream':
e:/programming/smpeg/video/parseblock.cpp:583: undefined reference to 
`IDCT_mmx(short*)'

They *are* getting assembled&linked- Why is this??
Here's the code for the mmxflags_asm.S, which should be enough for you 
folk to figure it out:
"
.text
     .align 2
.globl cpu_flags
     .def    cpu_flags;    .scl   2;      .type 32;    .endef
cpu_flags:
         pushfl
         popl %eax

         movl %eax,%edx

         xorl $0x040000,%eax
         pushl %eax

         popfl
         pushfl

         popl %eax
         xorl %ecx,%eax
         jz cpu_flags.L1   # Processor is 386

         pushl %ecx
         popfl

         movl %ecx,%eax
         xorl $0x200000,%eax

         pushl %eax
         popfl
         pushfl

         popl %eax
         xorl %ecx,%eax
         je cpu_flags.L1

         pushl %ebx

         movl $1,%eax
         cpuid
         movl %edx,%eax

         popl %ecx

cpu_flags.L1:
         ret

"

M@