Last Insight version dated by News from July 19, 2009 on its site. I guess that gdb gone far forward for last 15 years
You can try to build old version of gdb (from 2009 year), but I afraid of problems with modern compiler and old gdb after that No, I'm wrong. They update Insight in git without new releases (and any News), in 'steals' mode
According to logs you have a problem in building gdb itself. IMHO all unresolved symbols resides in source outside 'binutils/gdb' directory, but inside 'binutils/?' (I can't remember right now in what particular directory they resides).
Can you try to build 'vanila' gdb (without Insight)? Just to determine guilty part?