Debugging Issues with Clang 3.4 / Bundled GDB on Ubuntu 14.04.3 LTS x64

In Clion, the debugger is not hitting any of my breakpoints.  I have (at least) two problems from what I can tell form the GDB Log:

GNU gdb (GDB) 7.8
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python
>>>>>No source file named /opt/Company/Projects/Project/CMakeLists.txt.
No source file named /opt/Company/Projects/Project/File.cpp.
No source file named /opt/Company/Projects/Project/File.cpp.
No source file named /opt/Company/Projects/Project/File2.cpp.
No source file named /opt/Company/Projects/Project/linuxmain.cpp.
No source file named /opt/Company/Projects/Project/linuxmain.cpp.
Got object file from memory but can't read symbols: File truncated.
warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.



1) It looks like the bundled GDB cannot load the libpthread / libthread_db libraries from the /usr/lib/x86_64-linux-gnu.  I have created a .gdbinit file in ~, but the bundled gdb doesn't seem to load it.  When I choose to use the installed version of gdb instead, I don't get the warning about the thread library.

2) It looks like it cannot find the source code in the compiled file even though it was compiled with the -g option.  I've tried both Debug and RelWithDebInfo configurations.

Any suggestions?