GDB 7.6.2 on Mac OS: Could not find the frame base for "Class::method()".

Neal Kruis
Mon Feb 10 21:27:00 GMT 2014

I have had no luck finding a solution to this problem. I recently
noticed that I get the following message before my program begins:

BFD: /System/Library/Frameworks/CFNetwork.framework/Versions/A/CFNetwork(i386:x86-64):
unknown load command 0x20

A google search for "gdb bfd unknown load command" shows a lot of
people having issues with non-apple versions of GDB on Mac OS X. I
would really like to use some of the newer features of GDB and still
develop on my MacBookPro, but if I can't get GDB to work I'll have to
try a different approach.

Can anybody confirm this problem on other Macs? Does anyone know of a solution?


Neal Kruis

On Tue, Feb 4, 2014 at 10:31 AM, Neal Kruis
<> wrote:
> I am trying to debug a C++ program on Mac OS using a homebrew version
> of gdb. I think it works fine in my main() function, but elsewhere it
> gives me a warning when I try to look at the value of a variable:
> Could not find the frame base for "Class::method()".
> After scouring the internet, I am having a hard time understanding
> what this error means or finding out how to fix the problem.
> Since Apple's Xcode command line tools are painfully out-of-date I
> needed to use my own homebrewed versions of gcc and gdb. I don't know
> if there is something in the setup for these tools that I might have
> missed.
> Any thoughts?
> My system:
> Mac OS X 10.8.5 (Mountain Lion)
> gcc 4.8.2 (homebrewed) (with -O0 and -g3)
> gdb 7.6.2 (homebrewed and codesigned)
> This question is also posted on Stack Overflow if you want to answer it there:
> Neal Kruis

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