I get the following error when compiling using:
make all TARGET=mess

Linking messtest.exe
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x1d54): undefined reference to'floatx80_to_float64(floatx80)"obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x2912): undefined reference to'floatx80_is_nan(floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x4e7e): undefined reference to'floatx80_to_float32(floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x4eee): undefined reference to'floatx80_to_int32(floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x4f06): undefined reference to'floatx80_to_float32(floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x4f79): undefined reference to'floatx80_to_int32(floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x4fb6): undefined reference to'floatx80_to_int32(floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x6dca): undefined reference to'floatx80_sub(floatx80, floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x6e48): undefined reference to'floatx80_sub(floatx80, floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x6ee2): undefined reference to'floatx80_mul(floatx80, floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x6f7c): undefined reference to 'floatx80_add(floatx80, floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x6fce): undefined reference to 'floatx80_div(floatx80, floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x70ac): undefined reference to 'floatx80_sqrt(floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x7119): undefined reference to 'floatx80_to_int32_round_to_zero(floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x712e): undefined reference to 'int32_floatx80(int)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x7172): undefined reference to 'floatx80_to_int32(floatx80)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x71c3): undefined reference to 'float64_to_floatx80(unsigned long long)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x7217): undefined reference to 'float32_to_floatx80(unsigned int)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x7235): undefined reference to 'int32_to_floatx80(int)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x7296): undefined reference to 'int32_to_floatx80(int)"
obj/windows/mess/libcpu.a(m68kcpu.o):m68kcpu.c:(.text=0x7389): undefined reference to 'int32_to_floatx80(int)"
collect2: ld returned 1 exit status
make: *** [messtest.exe]Error 1

PS.Mess.exe, MessUI.exe & castool.exe compiles