I'm trying to get git running in cygwin on a windows 7 machine

I have git unpacked and the directory git-1.7.1.1

when i run make install from within that directory, I get

    CC fast-import.o
In file included from builtin.h:4,
                 from fast-import.c:147:
git-compat-util.h:136:19: iconv.h: No such file or directory
git-compat-util.h:140:25: openssl/ssl.h: No such file or directory
git-compat-util.h:141:25: openssl/err.h: No such file or directory
In file included from builtin.h:6,
                 from fast-import.c:147:
cache.h:9:21: openssl/sha.h: No such file or directory
In file included from fast-import.c:156:
csum-file.h:10: error: parse error before "SHA_CTX"
csum-file.h:10: warning: no semicolon at end of struct or union
csum-file.h:15: error: 'crc32' redeclared as different kind of symbol
/usr/include/zlib.h:1285: error: previous declaration of 'crc32' was here
csum-file.h:15: error: 'crc32' redeclared as different kind of symbol
/usr/include/zlib.h:1285: error: previous declaration of 'crc32' was here
csum-file.h:17: error: parse error before '}' token
fast-import.c: In function `store_object':
fast-import.c:995: error: `SHA_CTX' undeclared (first use in this function)
fast-import.c:995: error: (Each undeclared identifier is reported only once
fast-import.c:995: error: for each function it appears in.)
fast-import.c:995: error: parse error before "c"
fast-import.c:1000: warning: implicit declaration of function `SHA1_Init'
fast-import.c:1000: error: `c' undeclared (first use in this function)
fast-import.c:1001: warning: implicit declaration of function `SHA1_Update'
fast-import.c:1003: warning: implicit declaration of function `SHA1_Final'
fast-import.c: At top level:
fast-import.c:1118: error: parse error before "SHA_CTX"
fast-import.c: In function `truncate_pack':
fast-import.c:1120: error: `to' undeclared (first use in this function)
fast-import.c:1126: error: dereferencing pointer to incomplete type
fast-import.c:1127: error: dereferencing pointer to incomplete type
fast-import.c:1128: error: dereferencing pointer to incomplete type
fast-import.c:1128: error: `ctx' undeclared (first use in this function)
fast-import.c: In function `stream_blob':
fast-import.c:1140: error: `SHA_CTX' undeclared (first use in this function)
fast-import.c:1140: error: parse error before "c"
fast-import.c:1154: error: `pack_file_ctx' undeclared (first use in this functio
n)
fast-import.c:1154: error: dereferencing pointer to incomplete type
fast-import.c:1160: error: `c' undeclared (first use in this function)
make: *** [fast-import.o] Error 1

I'm guessing that most of these errors are due to the iconv.h and openssl files which apparently are missing, but I can't figure out how I'm supposed to install those (if I am), or if there is some other way to get around this.