pgadmin3 compilation error

Hi All,
I'm trying to compile pgadmin 3 on RHEL 5, using the source code , the 
"make  all"  fails with the following error , any tips ?
postgres_source/postgres_8.3.6/lib -lcrypto -lpq
/usr/bin/ld: skipping incompatible /usr/lib/libz.so when searching for -lz
/usr/bin/ld: skipping incompatible /usr/lib/libz.a when searching for -lz
/usr/bin/ld: skipping incompatible /usr/lib/libxslt.so when searching 
for -lxslt
/usr/bin/ld: skipping incompatible /usr/lib/libxslt.a when searching for 
-lxslt
/usr/bin/ld: skipping incompatible /usr/lib/libz.so when searching for -lz
/usr/bin/ld: skipping incompatible /usr/lib/libz.a when searching for -lz
/usr/bin/ld: cannot find -lcrypto
collect2: ld returned 1 exit status
make[2]: *** [pgadmin3] Error 1
make[2]: Leaving directory `/var/lib/pgsql/download/pgadmin3-1.8.4/pgadmin'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/lib/pgsql/download/pgadmin3-1.8.4'
make: *** [all] Error 2