Re: [PING][PATCH][1-3] New configure options that make the compiler use -fPIE and -pie as default option

[Daniel Micay <danielmicay at gmail dot com>]

On 11/01/15 06:37 AM, H.J. Lu wrote:
> On Sun, Jan 11, 2015 at 1:05 AM, Daniel Micay <danielmicay@gmail.com> wrote:
>> On 11/01/15 03:52 AM, Daniel Micay wrote:
>>> This branch works well for me. It doesn't automatically turn off the
>>> linker flag when -fno-PIE or -fno-PIC are passed like most of the
>>> wrapper scripts / downstream patches do, but that might not be a problem
>>> in practice.
> 
>  -fno-PIE and -fno-PIC aren't linking options.  We don't turn on PIE with
> 
> # gcc -fPIE ....
> 
> You need to use
> 
> # gcc -pie -fPIE
> 
> To turn off PIE, you should use
> 
> # gcc -no-pie -fno-PIE

Yeah, it's cleaner this way. Disabling the linker option when the reloc
model is known to be incompatible might be a bit too magical. I don't
expect that it avoids many compatibility issues anyway. As implemented
it's more than good enough to allow distributions to enable PIE across
the board which is all I care about :).

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