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From: Martin Vaeth <martin@mvath.de>
Subject: [gentoo-user] Re: Profile 17.0, PIE, USE="pic", C(XX)FLAGS "-fpic", "-fPIC"?
Date: Tue, 9 Jan 2018 20:28:39 +0000 (UTC)
Message-ID: <p338ln$179$1@blaine.gmane.org>
References: <20180109053448.GB13745@waltdnes.org>
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Walter Dnes <waltdnes@waltdnes.org> wrote:
>   Question: does PIE imply pic/PIC?

The code is somewhat different, but in principle yes.

> I.e does a PIE build also require USE="pic"

Assembler code which breaks pic will also break pie,
so better do not use that code.

> and CFLAGS/CXXFLAGS="-fpic -fPIC"?

These are usually added for libraries anyway.
They do not belong into your "manual" configuration file.

> If so, is there a way to disable PIE in profile 17.0?

If you want to switch it off for a particular binary,
there are -fno-PIE -no-pie.
Ebuilds should add it automatically if needed.
So far, I only needed it for clisp:
https://bugs.gentoo.org/show_bug.cgi?id=618170