[gentoo-user] Compile something with debugging information

[gentoo-user] Compile something with debugging information

[Alexander Skwar]

Hello.

All of a sudden, I'm having problems with the Postfix installation on
my server. smtpd dies with a Signal 11.

To debug this, I'd like to build postfix again, but this time portage
should not strip the binaries and it should be compiled with debugging
information compiled in (ie. with -g).

How would I do that?

Thanks a lot,

Alexander Skwar

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[gentoo-user] Re: Compile something with debugging information

[Alexander Skwar]

Ingrid wrote:

> All of a sudden, I'm having problems with the Postfix installation on
> my server. smtpd dies with a Signal 11.
> 
> To debug this, I'd like to build postfix again, but this time portage
> should not strip the binaries and it should be compiled with debugging
> information compiled in (ie. with -g).
> 
> How would I do that?

FEATURES="nostrip -ccache keeptemp keepwork test noclean" \
  CFLAGS="-march=athlon-xp -O0 -pipe -ggdb3" sudo emerge postfix

This seems to be at least one way to go.

Alexander Skwar

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Re: [gentoo-user] Compile something with debugging information

[Alan McKinnon]

On Tuesday 19 June 2007, Alexander Skwar wrote:
> Hello.
>
> All of a sudden, I'm having problems with the Postfix installation on
> my server. smtpd dies with a Signal 11.
>
> To debug this, I'd like to build postfix again, but this time portage
> should not strip the binaries and it should be compiled with
> debugging information compiled in (ie. with -g).

I've never tried this myself, but man 5 ebuild makes mention of 
EXTRA_ECONF and that it is for users to use, not ebuild writers.

alan


-- 
Optimists say the glass is half full,
Pessimists say the glass is half empty,
Developers say wtf is the glass twice as big as it needs to be?

Alan McKinnon
alan at linuxholdings dot co dot za
+27 82, double three seven, one nine three five
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Re: [gentoo-user] Re: Compile something with debugging information

[Daniel Pielmeier]

> > To debug this, I'd like to build postfix again, but this time portage
> > should not strip the binaries and it should be compiled with debugging
> > information compiled in (ie. with -g).
> >
> > How would I do that?

There is a good howto which explains building packages with debug
information and generating backtraces at
http://www.gentoo.org/proj/en/qa/backtraces.xml.

> FEATURES="nostrip -ccache keeptemp keepwork test noclean" \
>   CFLAGS="-march=athlon-xp -O0 -pipe -ggdb3" sudo emerge postfix
>
> This seems to be at least one way to go.

You can set this in /etc/portage/env/mail-mta/postfix to enable this
Features and Cflags only for this specific package.

Regards Daniel
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Re: [gentoo-user] Re: Compile something with debugging information

[Iain Buchanan]

On Tue, 2007-06-19 at 13:56 +0200, Alexander Skwar wrote:
> Ingrid wrote:
> 
> > All of a sudden, I'm having problems with the Postfix installation on
> > my server. smtpd dies with a Signal 11.
> > 
> > To debug this, I'd like to build postfix again, but this time portage
> > should not strip the binaries and it should be compiled with debugging
> > information compiled in (ie. with -g).
> > 
> > How would I do that?
> 
> FEATURES="nostrip -ccache keeptemp keepwork test noclean" \

I use 'splitdebug' instead of 'nostrip', because it doesn't leave your
binaries full of debugging info, but puts it into /usr/lib/debug, which
you can then delete at your convenience, without rebuilding.

cya,
-- 
Iain Buchanan <iaindb at netspace dot net dot au>

Subject: Bug#42432: debian-policy: Proposal for CTV for Draft for Proof of
Concept for Draft for Proposal for Proposal for CTV for a CTV to decide on
a proposal for a CTV for the CTV on whether or not we shoud have a CTV on
the /usr/doc to /usr/share/doc transition now, or later.
        -- Ed Lang

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Re: [gentoo-user] Re: Compile something with debugging information

[Bo Ørsted Andresen]

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On Tuesday 19 June 2007 13:56:19 Alexander Skwar wrote:
> > To debug this, I'd like to build postfix again, but this time portage
> > should not strip the binaries and it should be compiled with debugging
> > information compiled in (ie. with -g).
> >
> > How would I do that?
>
> FEATURES="nostrip -ccache keeptemp keepwork test noclean" \
>   CFLAGS="-march=athlon-xp -O0 -pipe -ggdb3" sudo emerge postfix
>
> This seems to be at least one way to go.

Why keeptemp keepwork noclean? keeptemp and keepwork are implied by noclean 
anyway so it's quite redundant. If you just want the source kept have a look 
at FEATURES=installsources in `man 5 make.conf`. Also have a look at 
FEATURES=splitdebug as already mentioned. test is unrelated but might of 
course be useful.

As mentioned by Daniel you can set FEATURES and CFLAGS on a per package basis 
in /etc/portage/env/$CATEGORY/$PN. Alternatively you can set it in a 
case; ...; esac construct in /etc/portage/bashrc (for multiple packages at 
once). Do note that variables here don't automatically stack so you need to 
either set everything you want or include $CFLAGS and $FEATURES.

-- 
Bo Andresen

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