What exactly does is_variable_sized test for?

[Amittai Aviram]

On Feb 22, 2012, at 8:19 PM, Ian Lance Taylor wrote:

> Amittai Aviram <amittai.Aviram@yale.edu> writes:
> 
>> Thanks a lot for the explanation and the advice.  I do have to unpack the macros sometimes when I want to verify a value while running GCC under GDB.
> 
> Look at gcc/gdbinit.in for convenient ways to dump the internal
> representation when running under gdb.
> 
> Ian


Sorry--this looks interesting, but I do not understand exactly how to use it.  Which are the commands and what are the arguments?  What does "$" mean?  I didn't see anything about this on the DebuggingGCC Wiki.  Thanks!

Amittai Aviram
PhD Student in Computer Science
Yale University
646 483 2639
amittai.aviram@yale.edu
http://www.amittai.com