Re: [gentoo-user] Re: per-package CFLAGS

[Rich Freeman]

On Tue, Jan 27, 2015 at 8:54 AM, Holger Hoffstätte
<holger.hoffstaette@××××××××××.com> wrote:
> On Tue, 27 Jan 2015 14:35:35 +0100, Raffaele BELARDI wrote:
>
>> I have a package failing build (media-tv/mythtv). One resource on the
>> net suggests using the -fno-devirtualize gcc flag. Google tells me that
>> the way to do that would be something like
>>
>> $ echo "CFLAGS=\"${CFLAGS} -fno-devirtualize\"" >
>> /etc/portage/env/media-tv/mythtv
>>
>> but the references are pretty old. Is this still the preferred way?
>
> This alone won't work and might also be more confusing than necessary, as
> the package-hierarchy-like naming is not required.

This alone works fine for me, and I don't find the naming confusing.
I'm sure the way you referenced would also work, though it ends up
dumping the configuration for every package into a single file.

cat /etc/portage/env/media-tv/mythtv
CFLAGS="-march=amdfam10 -Os -pipe -frename-registers -fweb"
CXXFLAGS="-march=amdfam10 -Os -pipe -frename-registers -fweb"

I would recommend that instead of just putting flags for each package
in a separate file that you instead create a per-package config and
then symlink it from the package name.  As in:
ls -l /etc/portage/env/media-tv/mythtv
lrwxrwxrwx 1 root root 13 Oct  5  2012
/etc/portage/env/media-tv/mythtv -> ../noparallel

-- 
Rich