ansidecl.h missing from Make in GCC 4.0

Wed Apr 27 18:56:00 GMT 2005

A newbie install question - I'm trying to install GCC 4.0 and it is erroring 
out. './configure' works and 'make' goes for awhile and then errors with

config.status: executing default-1 commands
./config.status: line 910: ./../../config-ml.in: No such file or directory
make: *** [configure-zlib] Error 1

Rerunning 'make' again and it goes for another dozen screens and then errors 
out at

touch stamp-picdir
make[1]: *** No rule to make target `../include/ansidecl.h', needed by 
`regex.o'.  Stop.
make[1]: Leaving directory 
`/usr/local/share/gcc-4.0.0/build-x86_64-unknown-linux-gnu/libiberty'
make: *** [all-build-libiberty] Error 2

Any ideas?