Re: Fwd: PING^3: [PATCH]: New configure options that make the compiler use -fPIE and -pie as default option

["H.J. Lu" <hjl.tools@gmail.com>]

On Wed, May 27, 2015 at 9:05 AM, Peter Bergner <bergner@vnet.ibm.com> wrote:
> On Wed, 2015-05-27 at 08:36 -0700, H.J. Lu wrote:
>> On Wed, May 27, 2015 at 8:24 AM, Peter Bergner <bergner@vnet.ibm.com> wrote:
>> > On Tue, 2015-05-26 at 16:40 -0500, Bill Schmidt wrote:
>> >> Ah, never mind.  I guess I need to run automake first.
>> >
>> > I ran the patch on powerpc64-linux (ie, Big Endian) both with and
>> > without --enable-default-pie.  Both bootstraps completed with no
>> > errors and the without --enable-default-pie regtested without any
>> > regressions.
>> >
>> > The --enable-default-pie regtesting shows massive failures that I
>> > have to look into.  I'm haven't determined yet whether these are
>> > all -m32 FAILs or -m64 FAILS or both.  I'll report back with more
>> > info after I dig into some of the failures.
>>
>> Does --enable-default-pie work on powerpc64-linux?  Do you
>> get working PIE by default?  Some GCC tests expect non-PIE.
>> I fixed some of them:
>
> I haven't looked into any of the failures yet.  That said,
> powerpc64-linux is PIC by default, so I thought maybe PIE

PIC != PIE.  Is PIE the default for powerpc64-linux? Please
show me

# readelf -h /bin/ls

on powerpc64-linux.

> would just work.  Maybe it does and it's just powerpc-linux
> tests that are failing (I run the testsuite with both
> -m32 and -m64).  I won't know until I get some time to have
> a deeper look.  That said, if there is something you know
> of that I should look for or at, I'd appreciate it.
>

You should first verify if --enable-default-pie generates a GCC which
can produce a simple hello program.

-- 
H.J.