Situation:
Using QT Creater, trying to debug a program on remote device. I set the breakpoints on the IDE but the breakpoints are not active and program does not stop.
Action:
The “Unable to find dynamic linker breakpoint” seemed pretty suspioucous so looked into that. Realized that I did not have the environment variable sysroot set to a copy of the target filesystem.
Within QT Creator you can set an environment variable in the Projects->Run Settings->Run->System Environment
variable: sysroot
value: /path/to/targetfs
Result:
While I still see the Unable to find dynamic linker breakpoint message, the program now stops at breakpoints I set on the IDE. Semi resolved.
Resources:
Below link is really good at explaining the issue.
http://www.fayewilliams.com/2013/01/31/gdb-unable-to-find-dynamic-linker-breakpoint-function/
http://e2e.ti.com/support/embedded/linux/f/354/t/102838.aspx
Mitchell Fang's Coding 
Hi, I’m facing a similar problem: I wrote a plugin and I want to use it in a project. However, when I set a breakpoint in the plugin code, the debug on device doesn’t stop (whereas the debug on desktop does)… could you please explain a bit more extensively the way you set sysroot in qtcreator? Because I don’t see Run->System Environment QTC 3.4… Thank you so much!
Yikes. Sorry can’t say I remember and I don’t do embedded software anymore. Best of luck
Thanks! I solved by making a symbolic link to the libraries into the directory targeted by set solib-search-path. Cheers