[LLVMdev] cmake doesn't build libLTO with debug info (original) (raw)

Duncan P. N. Exon Smith dexonsmith at apple.com
Tue Mar 4 17:53:13 PST 2014

+llvmdev

Thanks for the reply Nick.

On Mar 4, 2014, at 3:39 PM, Nick Kledzik <kledzik at apple.com> wrote:

Either libLTO was build with debug info or it was not, running dysmutil does not change that.

Right; my language wasn’t precise.

For daily development, you don’t need dsymutil. lldb also looks for debug notes and finds the original .o files and loads the debug info as needed.

Maybe, you moved libLTO to a different machine, or maybe you moved/deleted your .o files before trying to debug, or maybe this is some weird C++ debug info issue??

I was debugging libLTO.dylib, which I hadn’t done since I switched from configure to cmake. I didn’t get any symbols in lldb until I ran dsymutil and loaded them manually. Last time I debugged libLTO.dylib (with configure+make), I hadn’t had to run dsymutil.

However, I’ve just tried to reproduce the problem on a trivial test case and it’s gone. I can’t remember what my environment was at the time, but it looks like user error, or at least unrelated to cmake!

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