Duncan posted on Wed, 11 Oct 2017 03:31:55 +0000 as excerpted:

> Andreas K. Huettel posted on Tue, 10 Oct 2017 21:02:32 +0200 as
> excerpted:
>> Switching the profile changes the settings for building gcc (it
>> switches a use-flag from forced-off to forced-on). A gcc-6 built with
>> the 17.0 profiles will produce PIE executables by default, a gcc-6
>> built with the 13.0 profiles will not.
>> I've added this paragraph:
>> # Switching the profile modifies the settings of GCC 6 to generate
>> # PIE executables by default; thus, you need to do the rebuilds
>> # even if you already used GCC 6 beforehand.
> Thanks.  Much clearer now. =:^)
> (And I'll have some rebuilding to do.)

Actually it seems not.  I had forgotten this from my 
/etc/portage/profile/package.use.mask (along with the appropriate system-
wide USE flag):

# 2017.0513 Now that I have gcc-pie enabled, don't want
# the new profile package.use.mask.  See the
# "[PATCH] profiles: update pie use-flag masks for sys-devel/gcc"
# thread, OP on Thursday, 11 May 2017
# by Mathias Maier <tam...@gentoo.org on gentoo-devel
sys-devel/gcc           -pie

I had turned it on already by the time of the mask, and unmasked to avoid 
turning it off and rebuilding again, once it was on system-wide and the 
mask was trying to turn it off again, which would have forced another 
system-wide rebuild then, and yet /another/ one now.

Of course that's a big part of why I as a responsible gentoo-based-system 
sysadmin follow this list, to see such changes coming down the pike and 
take appropriate measures before they hit me and the systems I administer 
(only my own, but that's no reason not to take the job seriously)
head-on. =:^)

So AFAICS my profile upgrade should be just a matter of flipping the 
symlink. I guess I'll find out in the next few days.  =:^)

Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman

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