[gentoo-dev] The dreaded debug use flag/eclass

[Alec Warner <warnera6@egr.msu.edu>]

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Oh yeah, it's back, for the 6th time :)

I've provided links to all the other discussions I could find on
theaimsgroup in case you want to take a trip down memory lane.
Hopefully I'll summarize the previous discussion well enough that you
don't have to torture yourself..too much.

The latest discussion ( [4], [5] ) was brought up by SpanKY about how
the debug use flag and eclass are used differently depending on the
situation.  Some used the flag for turning on internal debugging
routines ( think verbose library output ).  Some used the flag to change
 CFLAGS and turn off stripping so that the debug symbols would remain
intact.

- From use.desc we gather:
skyfw@kyoto /usr/portage/profiles $ cat use.desc | grep debug
debug - Tells configure and the makefiles to build for debugging.
Effects vary across packages, but generally it will at least add -g to
CFLAGS. Remember to set FEATURES=nostrip too

Many people do not like the fact that a USE flag changes CFLAGS.
Although there are other USE flags that do this too ( pic comes to mind
in a couple ebuilds, checkpassword fex ) they are a minority compared to
debug.  People want to be able to debug things in a simple manner, and
this is not easily possible with the current portage system.  It
requires per-package FEATURES ( which is bottled with a host of other
things, see [6] ).

So, for future versions of portage ( not stable, unless per-package
features makes it in...somehow ) we add a FEATURE called "debug".  This
FEATURE will:
1. Set CFLAGS to a gentoo standard set ( perhaps user configurable ) of
flags.
2. Will turn on FEATURES="nostrip".
3. Anything else it should do? ( Redhat's moving debug info to a
seperate location perhaps? [3]

The debug.eclass will be depreciated.  The DEBUG use flag will change
names to an agreed upon name that specifies the addition of debuging
output.  Foser's debuginfo change seemed appropriately named ( although
thanks for changing it back :) ).

No more eclass, no more packages inheriting from the debug but not even
using the USE flag, just one per-package feature.

[1] http://marc.theaimsgroup.com/?l=gentoo-dev&w=2&r=8&s=debug&q=b
[2] http://marc.theaimsgroup.com/?l=gentoo-dev&w=2&r=7&s=debug&q=b
[3] http://marc.theaimsgroup.com/?l=gentoo-dev&w=2&r=4&s=debug&q=b
[4] http://marc.theaimsgroup.com/?l=gentoo-dev&w=2&r=2&s=debug&q=b
[5] http://marc.theaimsgroup.com/?l=gentoo-dev&w=2&r=1&s=debug&q=b
[6] http://bugs.gentoo.org/show_bug.cgi?id=44796
[7] http://bugs.gentoo.org/show_bug.cgi?id=55708
[8] http://bugs.gentoo.org/show_bug.cgi?id=55977

- -Alec Warner ( Antarus )
warnera6@egr.msu.edu
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