[Bug debug/33429] debug info for class2 in g++.dg/other/unused1.C requires -femit-class-debug-always

[dodji at seketeli dot org]

------- Comment #16 from dodji at seketeli dot org  2008-10-24 10:56 -------
Subject: Re:  debug info for class2 in g++.dg/other/unused1.C
  requires -femit-class-debug-always

jason at redhat dot com a écrit :
> Could you (Dodji) try building libstdc++ with -femit-class-debug-always, 
> and see how much it affects the size of the library?

So, I built libstdc++, nemiver, mozilla and openoffice with and without 
the -femit-class-debug-always. I both cases, I did build those programs 
with -g, obviously.

Below are the results of the measurements I did. The debug-info size is 
actually the total size of the elf sections which names are .debug*, 
summed up across all the binaries of a given software.
For a point of comparison, I did also measure the size of .text+data+bss 
segment for both cases.

I hope this helps.

Dodji.

=~=
Nemiver
========
[compact]
debug-info: 43686650
text+data+bss: 13403553

[emit-class-debug-always]
debug-info: 61978858
text+data+bss: 13403793

% increase of debug info size: 42%

libstdc++
=========
[compact]
debug-info: 6474724
text+data+bss: 1282176

[emit-class-debug-always]
debug-info: 6998035
text+data+bss: 1282176

% increase of debug info size: 8%

Mozilla
========
[compact]
debug-info: 882264540
text+data+bss: 60055643

[emit-class-debug-always]
debug-info: 975240699
text+data+bss: 60055739

% increase debug info size: 10,5%

OpenOffice
==========

[compact]
debug-info: 961663753
text+data+bss: 442286732

[emit-class-debug-always]
debug-info: 1010668556
text+data+bss: 442568161

% increase of debug info size: 5%
=~=


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33429