bsetup.s Assembler Messages?
 

While compiling a bzImage:

bsetup.s: Assembler messages:
bsetup.s:1647: Warning: indirect lcall without `*'
bsetup.s:2148: Error: invalid character '_' in mnemonic
bsetup.s:2151: Error: invalid character '_' in mnemonic
bsetup.s:2160: Error: invalid character '_' in mnemonic
make[1]: *** [bsetup.o] Error 1
make[1]: Leaving directory `/usr/src/linux-2.4.21/arch/i386/boot'
make: *** [bzImage] Error 2

Anyone know a way to troubleshoot a problem like this? I can't find any kernel troubleshooting guides.