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

[Neil McKenzie]

I have a RAID array which gets moved between a few different hardware
environments.
At the moment it is in an athlon-xp, but has previously been in an
athlon and an i686.

As a result, the installed packages have varied CFLAGS depending on
when I installed or upgraded them last.

I was poking around portage and gentoolkit and asking around on
#gentoo for a way to determine what an installed package's CFLAGS was
but no-one could help me.

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.

It would be nice to have an equivalent emerge's --newuse option, but for CFLAGS
. Could the portage devs please consider this as a feature request?
... or can portage already do this somehow?

Regards,
Neil.

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