The gifts are soulbound so yes, the character you want to craft a legendary on, will need to pause his crafting skills if they are not the ones needed for the legendary you want. It costs 40silver to reapply old crafting skills once youre done with fx. chef or whatever the legendary requires.
Comments
I belive you are one of the last people in the internet who never heard about google...
http://wiki.guildwars2.com/wiki/Legendary_weapon
have a nice day