+ N.B. Since source tar-ball can contain symbolic links, it's essential
+ that you use accompanying MSYS tar to unpack the source. It will
+ either handle them in one way or another or fail to extract them,
+ which does the trick too. Latter means that you may safely ignore all
+ "cannot create symlink" messages, as they will be "re-created" at
+ configure stage by copying corresponding files. Alternative programs
+ were observed to create empty files instead, which results in build
+ failure.
+