i tried to compile the kernel linux 2.4.19 in my fedora core 6 os. when i tried executing make bzImage command, i get an error as follows
gcc -D__KERNEL__ -I/usr/src/linux-2.4.19/include -Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing -fno-common -fomit-frame-pointer -pipe -mpreferred-stack-boundary=2 -march=i686 -DKBUILD_BASENAME=main -c -o init/main.o init/main.c
In file included from /usr/src/linux-2.4.19/include/linux/prefetch.h:13,
from /usr/src/linux-2.4.19/include/linux/list.h:6,
from /usr/src/linux-2.4.19/include/linux/wait.h:14,
from /usr/src/linux-2.4.19/include/linux/fs.h:12,
from /usr/src/linux-2.4.19/include/linux/capability.h:17,
from /usr/src/linux-2.4.19/include/linux/binfmts.h:5,
from /usr/src/linux-2.4.19/include/linux/sched.h:9,
from /usr/src/linux-2.4.19/include/linux/mm.h:4,
from /usr/src/linux-2.4.19/include/linux/slab.h:14,
from /usr/src/linux-2.4.19/include/linux/proc_fs.h:5,
from init/main.c:15:
/usr/src/linux-2.4.19/include/asm/processor.h:74: error: array type has incomplete element type
In file included from /usr/src/linux-2.4.19/include/linux/fs.h:201,
from /usr/src/linux-2.4.19/include/linux/capability.h:17,
from /usr/src/linux-2.4.19/include/linux/binfmts.h:5,
from /usr/src/linux-2.4.19/include/linux/sched.h:9,
from /usr/src/linux-2.4.19/include/linux/mm.h:4,
from /usr/src/linux-2.4.19/include/linux/slab.h:14,
from /usr/src/linux-2.4.19/include/linux/proc_fs.h:5,
from init/main.c:15:
/usr/src/linux-2.4.19/include/asm/byteorder.h:14: warning: type qualifiers ignored on function return type
/usr/src/linux-2.4.19/include/asm/byteorder.h:28: warning: type qualifiers ignored on function return type
In file included from /usr/src/linux-2.4.19/include/linux/byteorder/little_endian.h:11,
from /usr/src/linux-2.4.19/include/asm/byteorder.h:45,
from /usr/src/linux-2.4.19/include/linux/fs.h:201,
from /usr/src/linux-2.4.19/include/linux/capability.h:17,
from /usr/src/linux-2.4.19/include/linux/binfmts.h:5,
from /usr/src/linux-2.4.19/include/linux/sched.h:9,
from /usr/src/linux-2.4.19/include/linux/mm.h:4,
from /usr/src/linux-2.4.19/include/linux/slab.h:14,
from /usr/src/linux-2.4.19/include/linux/proc_fs.h:5,
from init/main.c:15:
/usr/src/linux-2.4.19/include/linux/byteorder/swab.h:132: warning: type qualifiers ignored on function return type
/usr/src/linux-2.4.19/include/linux/byteorder/swab.h:145: warning: type qualifiers ignored on function return type
/usr/src/linux-2.4.19/include/linux/byteorder/swab.h:159: warning: type qualifiers ignored on function return type
In file included from /usr/src/linux-2.4.19/include/linux/fs.h:317,
from /usr/src/linux-2.4.19/include/linux/capability.h:17,
from /usr/src/linux-2.4.19/include/linux/binfmts.h:5,
from /usr/src/linux-2.4.19/include/linux/sched.h:9,
from /usr/src/linux-2.4.19/include/linux/mm.h:4,
from /usr/src/linux-2.4.19/include/linux/slab.h:14,
from /usr/src/linux-2.4.19/include/linux/proc_fs.h:5,
from init/main.c:15:
/usr/src/linux-2.4.19/include/linux/ncp_fs_i.h:26: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp_fs_i.h:27: warning: ‘packed’ attribute ignored for field of type ‘__u8[6]’
In file included from /usr/src/linux-2.4.19/include/linux/ncp_mount.h:12,
from /usr/src/linux-2.4.19/include/linux/ncp_fs_sb.h:12,
from /usr/src/linux-2.4.19/include/linux/fs.h:701,
from /usr/src/linux-2.4.19/include/linux/capability.h:17,
from /usr/src/linux-2.4.19/include/linux/binfmts.h:5,
from /usr/src/linux-2.4.19/include/linux/sched.h:9,
from /usr/src/linux-2.4.19/include/linux/mm.h:4,
from /usr/src/linux-2.4.19/include/linux/slab.h:14,
from /usr/src/linux-2.4.19/include/linux/proc_fs.h:5,
from init/main.c:15:
/usr/src/linux-2.4.19/include/linux/ncp.h:24: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:25: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:26: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:27: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:28: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:29: warning: ‘packed’ attribute ignored for field of type ‘__u8[]’
/usr/src/linux-2.4.19/include/linux/ncp.h:37: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:38: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:39: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:40: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:41: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:42: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:43: warning: ‘packed’ attribute ignored for field of type ‘__u8[]’
/usr/src/linux-2.4.19/include/linux/ncp.h:137: warning: ‘packed’ attribute ignored for field of type ‘__u8’
/usr/src/linux-2.4.19/include/linux/ncp.h:138: warning: ‘packed’ attribute ignored for field of type ‘__u8[256]’
/usr/src/linux-2.4.19/include/linux/ncp.h:174: warning: ‘packed’ attribute ignored for field of type ‘__u8’
In file included from /usr/src/linux-2.4.19/include/asm/smp.h:17,
from /usr/src/linux-2.4.19/include/linux/smp.h:14,
from /usr/src/linux-2.4.19/include/linux/sched.h:23,
from /usr/src/linux-2.4.19/include/linux/mm.h:4,
from /usr/src/linux-2.4.19/include/linux/slab.h:14,
from /usr/src/linux-2.4.19/include/linux/proc_fs.h:5,
from init/main.c:15:
/usr/src/linux-2.4.19/include/asm/mpspec.h:86: warning: ‘packed’ attribute ignored for field of type ‘unsigned char[6]’
In file included from /usr/src/linux-2.4.19/include/linux/sched.h:23,
from /usr/src/linux-2.4.19/include/linux/mm.h:4,
from /usr/src/linux-2.4.19/include/linux/slab.h:14,
from /usr/src/linux-2.4.19/include/linux/proc_fs.h:5,
from init/main.c:15:
/usr/src/linux-2.4.19/include/linux/smp.h:29: error: conflicting types for ‘smp_send_reschedule’
/usr/src/linux-2.4.19/include/asm/smp.h:65: error: previous declaration of ‘smp_send_reschedule’ was here
In file included from /usr/src/linux-2.4.19/include/linux/unistd.h:9,
from init/main.c:17:
/usr/src/linux-2.4.19/include/asm/unistd.h:365: warning: conflicting types for built-in function ‘_exit’
make: *** [init/main.o] Error 1

what must i do to rectify it?

Make sure your cd to linux-2.4.19 before you start to configure the kernel...

ya i was in that directory only,but no use!

It's looking as if there are some header file conflicts. Did you get some of the kernel packages separately or all together? The variables are already defined by the time you get to that point. Did you run "Make clean" I believe it is? That should get rid of cached configure. If you can get to that point...let me do some more checking into that. Sorry I'm not more help

Make that ./configure clean

got the kernel package separately. tried make clean but evn that didn't help! any other ways to rectify it?

Let me see what I can find out...sorry about time, been very very busy