Didn't checked if there was any kind of instructions on how to build, so i tested around the new building functionality and found it rather painful due to some non obvious and unintuitive stuff.
Especially when DF does not care that you have an axe or if your character was intelligent enough to switch automatically to the axe when felling tree, no,no no ! you MUST have the axe in hand, so you need to drop either shield or sword you had so you can have that damned axe in hand so DF could allow you to fell a tree, that required some map off/on loading apparently .
Anyways, once that worked and after felling 3 trees to have truckload enough of logs, i picked them all one by one (i hope Toady will allow multi-pick stuff or stacking in the future), and slowly walked to the location i wanted to build and after using the b(uilding) new function to make my plans, the game then considered i had no log... despite they were all in my backpack .
I dropped everything and then the game considered then i had those logs, so they must be on ground to be used...
Anyways, after several long (lots of boring map offloading - loading ) steps, finally managed to build the thing.
Then made my workshop from remaining logs, took a couple of them and went to x -> carpentry and make my wooden door ... until game tells me ... no log , despite i had 2 of them in backpack.
Remembering the stuff with the wooden cabin, i dropped them both, and ... the door could then be built.
Went back with my door in hand to b(uild) it on my cabin, and ... no door... Not again that ! i then dropped the door on the ground, and voila, i could build my door on the cabin.
The whole thing could sure use some usability improvement, but at least it works and hopefully we'll get more things to do in future updates (digging).
Proud of this small forest cabin that my 2 party members helped to make , with all the map off/onloading during the process it must be even more painful to make one alone.
Probably going to make myself the new lord of the forest cabin , probably going to impress the ladies in the nearby hamlet