Re: Using LTO with libtool

[Bob Friesenhahn]

On Sun, 5 May 2013, Schrober wrote:

> Hi,
>
> I wanted to use link-time optimization (LTO/-flto) of GCC with libtool. I
> thought I only have to add "-flto" to CFLAGS and LDFLAGS and then I am
> finished. But it seems that this is not enough because some CFLAGS aren't
> copied to the linker command (e.g. -g). This results in a binary with missing
> information. Is there a differrent "correct" way to use libtool (through
> automake) with LTO?

Have you tried configuring with something like 'CC=gcc -flto -g'?

While being evil, this seems likely to work if CC is used as the 
linker.

I would agree that -flto is often not easy to use.  While libtool does 
not block use of -flto, I don't think it provides any special support 
for it.

Bob
--
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/