An error occurred while compiling the linux kernel!

An error occurred while compiling the linux kernel! -- Linux general technology-Linux programming and kernel information. The following is a detailed description. Make mrproper, make menuconfig, make dep, and then make bzImage has an error. The error message is as follows. Please help me. Thank you!

Gcc-D__KERNEL _-I/usr/src/linux-2.4.20/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing-fno-common-fomit- frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i386-DKBUILD_BASENAME = main-c-o init/main. o init/main. c
In file encoded ded from/usr/src/linux-2.4.20/include/linux/kernel. h: 15,
From/usr/src/linux-2.4.20/include/linux/wait. h: 13,
From/usr/src/linux-2.4.20/include/linux/fs. h: 12,
From/usr/src/linux-2.4.20/include/linux/capability. h: 17,
From/usr/src/linux-2.4.20/include/linux/binfmts. h: 5,
From/usr/src/linux-2.4.20/include/linux/sched. h: 9,
From/usr/src/linux-2.4.20/include/linux/mm. h: 4,
From/usr/src/linux-2.4.20/include/linux/slab. h: 14,
From/usr/src/linux-2.4.20/include/linux/proc_fs.h: 5,
From init/main. c: 15:
/Usr/src/linux-2.4.20/include/asm/byteorder. h: 14: Warning: Ignore the type limitation of the function return type
/Usr/src/linux-2.4.20/include/asm/byteorder. h: 28: Warning: Ignore type limitation for function return type
In file encoded ded from/usr/src/linux-2.4.20/include/linux/byteorder/little_endian.h: 11,
From/usr/src/linux-2.4.20/include/asm/byteorder. h: 45,
From/usr/src/linux-2.4.20/include/linux/kernel. h: 15,
From/usr/src/linux-2.4.20/include/linux/wait. h: 13,
From/usr/src/linux-2.4.20/include/linux/fs. h: 12,
From/usr/src/linux-2.4.20/include/linux/capability. h: 17,
From/usr/src/linux-2.4.20/include/linux/binfmts. h: 5,
From/usr/src/linux-2.4.20/include/linux/sched. h: 9,
From/usr/src/linux-2.4.20/include/linux/mm. h: 4,
From/usr/src/linux-2.4.20/include/linux/slab. h: 14,
From/usr/src/linux-2.4.20/include/linux/proc_fs.h: 5,
From init/main. c: 15:
/Usr/src/linux-2.4.20/include/linux/byteorder/swab. h: 160: Warning: Ignore the type limitation of the function return type
/Usr/src/linux-2.4.20/include/linux/byteorder/swab. h: 173: Warning: Ignore the type limitation of the function return type
/Usr/src/linux-2.4.20/include/linux/byteorder/swab. h: 186: Warning: Ignore the type limitation of the function return type
/Usr/src/linux-2.4.20/include/linux/byteorder/swab. h: 200: Warning: Ignore the type limitation of the function return type
In file encoded ded from/usr/src/linux-2.4.20/include/linux/prefetch. h: 13,
From/usr/src/linux-2.4.20/include/linux/list. h: 6,
From/usr/src/linux-2.4.20/include/linux/wait. h: 14,
From/usr/src/linux-2.4.20/include/linux/fs. h: 12,
From/usr/src/linux-2.4.20/include/linux/capability. h: 17,
From/usr/src/linux-2.4.20/include/linux/binfmts. h: 5,
From/usr/src/linux-2.4.20/include/linux/sched. h: 9,
From/usr/src/linux-2.4.20/include/linux/mm. h: 4,
From/usr/src/linux-2.4.20/include/linux/slab. h: 14,
From/usr/src/linux-2.4.20/include/linux/proc_fs.h: 5,
From init/main. c: 15:
/Usr/src/linux-2.4.20/include/asm/processor. h: 74: error: the type of the array element is incomplete
In file encoded ded from/usr/src/linux-2.4.20/include/linux/fs. h: 318,
From/usr/src/linux-2.4.20/include/linux/capability. h: 17,
From/usr/src/linux-2.4.20/include/linux/binfmts. h: 5,
From/usr/src/linux-2.4.20/include/linux/sched. h: 9,
From/usr/src/linux-2.4.20/include/linux/mm. h: 4,
From/usr/src/linux-2.4.20/include/linux/slab. h: 14,
From/usr/src/linux-2.4.20/include/linux/proc_fs.h: 5,
From init/main. c: 15:
/Usr/src/linux-2.4.20/include/linux/ncp_fs_ I .h: 26: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp_fs_ I .h: 27: Warning: fields of the 'packed' property type '_ u8 [6]' are ignored
In file encoded ded from/usr/src/linux-2.4.20/include/linux/ncp_mount.h: 12,
From/usr/src/linux-2.4.20/include/linux/ncp_fs_sb.h: 12,
From/usr/src/linux-2.4.20/include/linux/fs. h: 703,
From/usr/src/linux-2.4.20/include/linux/capability. h: 17,
From/usr/src/linux-2.4.20/include/linux/binfmts. h: 5,
From/usr/src/linux-2.4.20/include/linux/sched. h: 9,
From/usr/src/linux-2.4.20/include/linux/mm. h: 4,
From/usr/src/linux-2.4.20/include/linux/slab. h: 14,
From/usr/src/linux-2.4.20/include/linux/proc_fs.h: 5,
From init/main. c: 15:
/Usr/src/linux-2.4.20/include/linux/ncp. h: 24: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 25: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 26: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 27: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 28: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 29: Warning: Fields Whose 'packed' property is of Type '_ u8 []' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 37: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 38: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 39: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 40: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 41: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 42: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 43: Warning: Fields Whose 'packed' property is of Type '_ u8 []' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 137: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 138: Warning: Fields Whose 'packed' property is of Type '_ u8 [256]' are ignored
/Usr/src/linux-2.4.20/include/linux/ncp. h: 174: Warning: Fields Whose 'packed' property is of Type '_ u8' are ignored
In file sorted ded from/usr/src/linux-2.4.20/include/linux/unistd. h: 9,
From init/main. c: 17:
/Usr/src/linux-2.4.20/include/asm/unistd. h: 375: Warning: conflicts with the built-in function '_ exit' type
Make: *** [init/main. o] Error 1