Help!

I cannot compile OpenSSH on 192.XXX.XXX.XXX.  The ZLIB library needs 
installed.
 
root@wrnxxx:/opt/ssh/sources/openssh-4.5p1 $ ./configure --prefix=/opt/ssh
checking for deflate in -lz... no
configure: error: *** zlib missing - please install first or check 
config.log ***
When I attempted to build the zlib library I get this.
 
root@wrnxxx:/opt/ssh/sources/zlib-1.2.3 $ ./configure
Checking for gcc...
Building static library libz.a version 1.2.3 with cc.
Checking for unistd.h... No.
Checking whether to use vs[n]printf() or s[n]printf()... using 
s[n]printf()
Checking for snprintf() in stdio.h... No.
  WARNING: snprintf() not found, falling back to sprintf(). zlib
  can build but will be open to possible buffer-overflow security
  vulnerabilities.
Checking for return value of sprintf()... No.
  WARNING: apparently sprintf() does not return a value. zlib
  can build but will be open to possible string-format security
  vulnerabilities.
Checking for errno.h... No.
Checking for mmap support... No.
root@wrnxxx:/opt/ssh/sources/zlib-1.2.3 $ make
        cc -O -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c adler32.c
(Bundled) cc: warning 480: The -O option is available only with the C/ANSI 
C product; ignored.
(Bundled) cc: "adler32.c", line 72: error 1701: Unsigned suffix is an ANSI 
feature.
(Bundled) cc: "adler32.c", line 73: error 1701: Unsigned suffix is an ANSI 
feature.
(Bundled) cc: "adler32.c", line 75: error 1701: Unsigned suffix is an ANSI 
feature.
(Bundled) cc: "adler32.c", line 76: error 1701: Unsigned suffix is an ANSI 
feature.
(Bundled) cc: "adler32.c", line 90: error 1701: Unsigned suffix is an ANSI 
feature.
(Bundled) cc: "adler32.c", line 91: error 1701: Unsigned suffix is an ANSI 
feature.
(Bundled) cc: "adler32.c", line 92: error 1701: Unsigned suffix is an ANSI 
feature.
(Bundled) cc: "adler32.c", line 104: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 105: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 119: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 120: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 138: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 141: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 142: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 143: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 144: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 144: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 145: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 145: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 146: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 146: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 147: error 1701: Unsigned suffix is an 
ANSI feature.
(Bundled) cc: "adler32.c", line 147: error 1701: Unsigned suffix is an 
ANSI feature.
*** Error exit code 1
Please help with solution

Thanks,

Keefe Drayton