c:/qt_2010.01/mingw/bin/../lib/gcc/mingw32/4.4.0/../../../../mingw32/bin/ld.exe:
cannot find -lz
collect2: ld returned 1 exit status
mingw32-make[1]: *** [libcurl.dll] Error 1
mingw32-make[1]: Leaving directory `C:/curl-7.19.7/curl-7.19.7/lib'
mingw32-make: *** [mingw32-ssl-zlib] Error 2