Is there an option analogous to Delphi "Use debug DCUs" in Lazarus

I'd like to debug Lazarus library code. In Delphi IDE I would simply check the Project Options开发者_运维百科 -> Compiler -> Use Debug DCUs option on. Is there something similar in Lazarus?

Yes and no. It roughly works the same as in Delphi, you need two sets of the compiled units. (.o/.ppu), and some way to switch.

But because FPC/Lazarus are open source, only one set (the one without) is distributed. But you can craft the other byrecompile FPC and Lazarus with -gl. For tips on recompiling FPC/Lazarus see http://www.stack.nl/~marcov/buildfaq.pdf

(it is even possible to do combinations. I debug many of my applications with everything debug except systems and sysutils, so that I don't trace into each and every string and exception helper, a major annoyance on Delphi)

Currently the releases afaik don't distribute the duplicate sets, but this is more a release engineering problem. (specially since by using strip, the non-debug set can be probably crafted from the debug set)

BTW, it might be worth the trouble to ask on the Lazarus maillist if such way exists. Even if the release doesn't set it up, there might still be a possibility that the functionality exists.