Bug 127531 – dual-packages feature

• Product: Gentoo Linux
• Status: RESOLVED WORKSFORME

[Description Maciej Piechotka 2006-03-25 07:12:16 UTC]

Idea is as in -dbg debian packages. Have in system in the same time packages stripped (for normal use) and for developers.
It could use for example anouthe CFLAGS (like CFLAGS_DEBUG).

[Comment 1 Jakub Moc (RETIRED) 2006-03-25 07:18:55 UTC]

emerge latest portage and see FEATURES="splitdebug". Reopen if I have misunderstood your request.

[Comment 2 Maciej Piechotka 2006-03-25 07:27:17 UTC]

If I understend make.conf(5) it just strip or not.
I mean something more:
CFLAGS="-O3 -march=pentium3 -mmmx -msse -mfpmath=sse -fomit-frame-pointer -ffast-math -pipe"
CFLAGS_DEBUG="-O0 -ggdb"

In normal work I don't need have frame pointer, additional debug info and I can optymalize it. However it's wrong for debugging.

[Comment 3 Jakub Moc (RETIRED) 2006-03-25 10:17:31 UTC]

(In reply to comment #2)
> If I understend make.conf(5) it just strip or not.

No, you don't understand it. It saves debugging info into /usr/lib/debug *before* stripping the binaries. Please, test the feature before reopening this bug.

[Comment 4 Maciej Piechotka 2006-03-25 11:12:35 UTC]

I've understood. IWhat is now it's usful - I agree.
But compilation with the same flags:
a) would not be for dubug as good as it could be (-On where n != 0 can make some vars unexisting, -fomit-frame-pointer ect.).
or
b) would not be as fast for normal work as it could be (-O0 is slower)
In addition:
There are differences which are not in stripping:
struct some_struct {
  //some var
#ifdef DEBUG
  //some debug vars
#endif
}

ect.

It's very similar to splitdebug - but it have few differences (like rerun configure script, add debug flag ect.).

http://live.gnome.org/GettingTraces/DistroSpecificInstructions says to remove agressive flags from CFLAGS. But for normal work this optimalisation make my gnome much faster.

Regards.

PS. I understend splitdebug but I use shortcut incorrect abrigement.

[Comment 5 Jakub Moc (RETIRED) 2006-03-25 12:22:56 UTC]

(In reply to comment #4)
> I've understood. IWhat is now it's usful - I agree.
> But compilation with the same flags:
> a) would not be for dubug as good as it could be (-On where n != 0 can make
> some vars unexisting, -fomit-frame-pointer ect.).
> or
> b) would not be as fast for normal work as it could be (-O0 is slower)

The splitdebug feature is intended to help Gentoo developers with debugging user-submitted issues, while still allowing users to use their normal C[XX]FLAGS. Users are able to provide useful debugging info even without using compiler flags like -ggdb etc.

What you are requesting is indeed beyond the scope of this feature. If you wish to discuss this/suggest some way of implementation, I'd ask you to take this to gentoo-dev mailing list first, it's a much better place for discussion.

Thanks.