Re: [gentoo-dev] portage suggestion: recompiling after CFLAGs change

[Jason Stubbs]

On Wednesday 08 December 2004 12:13, Neil McKenzie wrote:
> I ended up finding /var/db/pkg/$category/$package/CFLAGS
> and hacked this bit of perl to list all installed packages and their
> CFLAGS:
>
> open PKGS, "find /var/db/pkg/ -type f -name CFLAGS|";
> while ($filename = <PKGS>)
> {
>         ($_,$_,$_,$_,$cat,$pkg,$_) = split /\//,$filename;
>         print "=$cat/$pkg => ".`cat $filename`;
> }
>
> This info can save you having to do an emerge -e world unneccessarily.

Yes and no. Try using it to reemerge and then using it to --pretend afterward. 
You'll find it wanting to re-emerge a large portion of what was just merged 
with. The reason is that the CFLAGS stored in those files are the CFLAGS at 
(technically, after) compile time rather than those that were read from 
make.conf. This may be changed or extended in the future, but for the time 
being there is no way it can be done accurately.

Regards,
Jason Stubbs

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