make buildworld fails

[gandalf]

  Hello,

I have this file /etc/sup.sys:

*default host=cvsup.hu.FreeBSD.org
*default base=/usr
*default prefix=/usr
*default release=cvs tag=RELENG_6
*default delete use-rel-suffix
*default compress
src-all


Then I traverse to /usr and execute this command:

cvsup /etc/sup.sys

After successful checkout, I do

cd /usr/src
make buildworld

This is what I get:

--------------------------------------------------------------
 >>> Building an up-to-date make(1)
--------------------------------------------------------------
rm -f .depend
mkdep -f .depend -a    -I/usr/src/usr.bin/make 
-DMAKE_VERSION=\"5200408120\" -D__FBSDID=__RCSID -DDEFSHELLNAME=\"sh\"  
/usr/src/usr.bin/make/arch.c /usr/src/usr.bin/make/buf.c 
/usr/src/usr.bin/make/cond.c /usr/src/usr.bin/make/dir.c 
/usr/src/usr.bin/make/for.c /usr/src/usr.bin/make/hash.c 
/usr/src/usr.bin/make/hash_tables.c /usr/src/usr.bin/make/job.c 
/usr/src/usr.bin/make/lst.c /usr/src/usr.bin/make/main.c 
/usr/src/usr.bin/make/make.c /usr/src/usr.bin/make/parse.c 
/usr/src/usr.bin/make/proc.c /usr/src/usr.bin/make/shell.c 
/usr/src/usr.bin/make/str.c /usr/src/usr.bin/make/suff.c 
/usr/src/usr.bin/make/targ.c /usr/src/usr.bin/make/util.c 
/usr/src/usr.bin/make/var.c
In file included from /usr/src/usr.bin/make/arch.c:107:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/cond.c:59:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/dir.c:97:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/for.c:55:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/job.c:131:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/main.c:84:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/make.c:80:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/parse.c:86:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/str.c:49:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/suff.c:102:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/targ.c:84:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/util.c:59:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
In file included from /usr/src/usr.bin/make/var.c:96:
/usr/src/usr.bin/make/globals.h:49: stdint.h: No such file or directory
mkdep: compile failed
*** Error code 1

Stop in /usr/src/usr.bin/make.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.


What am I doing wrong?

Additional questions:

- Can I upgrade from 4.8 to 6.0 in one step? Or should I upgrade to 5.4 
first?
- I have a .so file for 4.8. I do not have the sources, will it work on 6.0?

Thanks,

   Laszlo