RFC: Add --enable-static-pie to build static executables as PIE

[H.J. Lu]

On Tue, Jul 18, 2017 at 8:21 AM, Szabolcs Nagy <szabolcs.nagy@arm.com> wrote:
> On 18/07/17 14:48, Alan Modra wrote:
>> On Tue, Jul 18, 2017 at 05:30:48AM -0700, H.J. Lu wrote:
>>> On Mon, Jul 17, 2017 at 9:25 PM, Alan Modra <amodra@gmail.com> wrote:
>>> Linker needs to support --no-dynamic-linker.
>>
>> Is there really much to be gained from PIEs that don't use ld.so
>> versus those that do?
>>
>
> in glibc ld.so in principle only works with one particular
> version of glibc, you cannot move a static linked pie binary
> to another system if it has ld.so dependency.
>

Please checkout hl/pie/static branch at

https://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/hl/pie/static

It works surprising well on x86-64.  The changes are relative minor and there
are no regressions.   The gcc driver only needs some minor changes to create
static PIE.

I am working on i386,  mainly PIC vs SHARED.


-- 
H.J.