This is what I'm getting ; 
 
 
make[1]: Entering directory `/hw/tools/ftp/emacs/emacs-21.2/lib-src'
gcc -c -D_BSD_SOURCE    -DHAVE_CONFIG_H    -I. -I../src
-I/hw/tools/ftp/emacs/emacs-21.2/lib-src
-I/hw/tools/ftp/emacs/emacs-21.2/lib-src/../src -D_BSD_SOURCE     -g -O2
-Demacs  /hw/tools/ftp/emacs/emacs-21.2/lib-src/movemail.c
/hw/tools/ftp/emacs/emacs-21.2/lib-src/movemail.c: In function `strerror':
/hw/tools/ftp/emacs/emacs-21.2/lib-src/movemail.c:947: conflicting types for
`sys_errlist'
/hw/tools/gnu/gcc/3.2.2/i686/lib/gcc-lib/i686-pc-linux-gnu/3.2.2/include/stdi
o.h:563: previous declaration of `sys_errlist'
make[1]: *** [movemail.o] Error 1
make[1]: Leaving directory `/hw/tools/ftp/emacs/emacs-21.2/lib-src'
make: *** [lib-src] Error 2