Re: [testsuite] PATCH: Add check_effective_target_pie

[Jeff Law <law@redhat.com>]

On 01/12/15 14:51, Magnus Granberg wrote:
> måndag 12 januari 2015 12.11.17 skrev  H.J. Lu:
>> On Mon, Jan 12, 2015 at 12:03 PM, Jeff Law <law@redhat.com> wrote:
>>> On 01/12/15 12:59, H.J. Lu wrote:
>>>> I don't know if -pg will work PIE on any targets.  For Linux/x86
>>>> the choices of crt1.o are
>>>>
>>>> %{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}
>>>>
>>>> -shared, -pg and -pie are mutually exclusive. Those crt1 files are
>>>> only crt1 files provided by glibc.  You can't even try -pg -pie on
>>>> Linux without changing glibc.
>>>
>>> You're totally missing the point.  What I care about is *why*.
>>>
> With -pg it use gcrt1.o object file and that file is not compile with -fPIC.
> When you build a shared lib on x86_64 all the objects files need to be buiit
> with -fPIC else you get a error like that one abow and it is the same problems
> when you build bin with -fPIE and linke with -pie.
> Glibc do not provide one that is compile with -fPIC
Is there some reason why glibc could not provide gcrt1.o compiled with 
-fPIC?


Jeff