Download and run the cygwin installer from http://www.cygwin.com/
You’ll need to select the following packages to be installed from the list:

  • binutils
  • gcc4-core
  • gcc4-gcc
  • libwrap-devel
  • libwrap0
  • make
  • mercurial
  • wget

Once everything has installed, start cygwin. You now need to obtain the source for mosquitto. If you wish to compile a released version, do the following (updating the version number appropriately):

If you want to use the unreleased code from the repository, do the following:

If you already have a copy of the repository code and want to update, do the following to get the latest version:

  • cd mosquitto
  • hg pull -u

Compiling should now be as simple as typing “make”. Note that there will be an error when trying to create the man page documentation – this is non-critical.

You can now run mosquitto through cygwin, or if you want to run it by double clicking then you will need to place the appropriate dlls in its directory – again, see the Windows binary releases.