when I install vim5.6, I got the following problems:
cc -O2 -fno-strength-reduce -Wall -DUNIX -o xxd xxd.c
xxd.c: In function `main':
xxd.c:618: warning: subscript has type `char'
xxd.c:637: warning: subscript has type `char'
c -Iproto version.c
sh: c: not found
*** Error code 1 (ignored)
/link.sh: /link.sh: cannot open
*** Error code 1
make: Fatal error: Command failed for target `vim'
Current working directory /vim/vim-5.6/src
*** Error code 1
make: Fatal error: Command failed for ta