GCC -- reducing compiled code size

[Ignoramus3627]

We have a library that has 179385 lines of code.

With GCC, no debug information requested (no -g option) it creates a
31 meg long .a library file.

I think that it is excessive. Any idea what I can do to reduce the
size?

i

[Victor Bazarov]

Ignoramus3627 wrote:

We have a library that has 179385 lines of code.

With GCC, no debug information requested (no -g option) it creates a
31 meg long .a library file.

I think that it is excessive. Any idea what I can do to reduce the
size?

C++ _language_ imposes no requirements on the size of the produced
object code (or machine code). Please ask in the newsgroup dedicated
to your compiler (gnu.g++.help comes to mind).

V
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[Roland Pibinger]

On Mon, 23 Jul 2007 13:03:38 -0500, Ignoramus3627 wrote:

>I tried -DNDEBUG -Os -fvisibility-inlines-hidden, it reduced size by
only about 12%. Thanks, that was helpful, though I was hoping for more.

-s means "Strip all symbols". It's a linker option and should
considerably reduce your code size (-Os is a compiler option that
might also help but it's not the same as -s). Linker options are
displayed with ld --help.
--
Roland Pibinger
"The best software is simple, elegant, and full of drama" - Grady Booch

[James Kanze]

On Jul 23, 7:29 pm, "Victor Bazarov" <[e-mail]:

Ignoramus3627 wrote:

We have a library that has 179385 lines of code.

With GCC, no debug information requested (no -g option) it creates a
31 meg long .a library file.

I think that it is excessive. Any idea what I can do to reduce the
size?

C++ _language_ imposes no requirements on the size of the produced
object code (or machine code). Please ask in the newsgroup dedicated
to your compiler (gnu.g++.help comes to mind).

Even then. The whole question is misformed: since when is there
any direct relationship between lines of code and size of a
library. With a little bit of clever use of templates, I can
get a library that big with only a thousand lines of code,
probably even less. On the other hand, it's pretty easy to
write code where the library size will be smaller than the
original C++ source code. Without seeing the exact code, it's
impossible to say whether the size is excessive or not. (Even
from a quality of implementation point of view.)

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