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From: John Baldwin <jhb@freebsd.org>
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Subject: Re: compiling libc and libthr with debugging?
Date: Thu, 7 Feb 2013 13:20:16 -0500
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Cc: Steve Kargl <sgk@troutmask.apl.washington.edu>
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On Thursday, February 07, 2013 1:14:41 pm Steve Kargl wrote:
> What's the preferred method for compiling libc
> and libthr with debugging enable?

I just do:

cd /path/to/src/lib/libc
make clean
make DEBUG_FLAGS=-g

Then when I run the binary I use a custom LD_LIBRARY_PATH that points at the 
directory holding the custom libc.

-- 
John Baldwin