- "winsock2.h" needs to be included before "windows.h". But if a
compilation unit include "windows.h" and after "networkTools.h", we
fails and it is complicated to handle. The include must not be in the
header but in the cpp
- windows define some ERROR macro. It is a pitty but we cannot use `ERROR`
in our enum.
- If build statically using mingw we need to define `CURL_STATICLIB`
There is no more integrated build of dependencies in the build system.
Dependencies are discovered using pkg-config except for ctpp2 where there
is no pkg-config file.