make failed

[luckypoem]

hi.

root@gcv:/romanbsd-spdy/ext# ls
base build em_setsockopt.c extconf.rb Makefile mkmf.log module.cc net
root@gcv:/romanbsd-spdy/ext# make
compiling net/spdy/spdy_framer.cc
cc1plus: warning: command line option ‘-Wdeclaration-after-statement’ is valid for C/ObjC but not for C++ [enabled by default]
cc1plus: warning: command line option ‘-Wimplicit-function-declaration’ is valid for C/ObjC but not for C++ [enabled by default]
net/spdy/spdy_framer.cc:18:35: fatal error: third_party/zlib/zlib.h: No such file or directory
#include "third_party/zlib/zlib.h"
^
compilation terminated.
make: *** [net/spdy/spdy_framer.o] Error 1
root@gcv:~/romanbsd-spdy/ext#

how to fix the issues?
tsk