Just probably a simple question to answer, while most traits say that add +1 to attack rolls with certain criteria such as the Dragonslayer trait for worshiping Dahak which says that you get a +1 trait bonus on attack rolls against creatures with the dragon subtype but the Corpse Hunter trait for Pharasma says you gain a +1 trait bonus on attacks made against undead.
So does that bonus apply to all aspects of an attack including the damage roll?
Just looked this one up myself, I'm betting you answered it yourself..typically it spells out "damage" to a bonus if that is what you get, it would be nice to get both but just the "to hit"...but keep in mind this would help with your touch attacks against undead! This is how I'm going to play it at least....
An "Attack Roll" is always in reference to the d20 roll to hit something.
Look at the Weapon Focus and Weapon Specialization feats.
Edit: Wow, this guy asked a very simple question in the rules forum months ago and only just now got an answer. Kind of sad.