Building GMP under MinGW - makefile problems

Question

Downloaded and installed latest MinGW yesterday, and GMP 4.3.2

$ ./configure ran just fine.

On running make check,

The first problem was

$ make check
makefile:15: *** missing separator.  Stop.

OK, so, I put the TAB char at the beginning of line 15.

Next problem is

$ make check
makefile:15: *** commands commence before first target.  Stop.

Is this makefile just full of problems?
Is it fixable (by me)?

Maybe more to the point,
Is there available a known, reliable Makefile.in for GMP?

I just want to get GMP installed in my MinGW environment without a lot of sorcery.

Thanks!