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Re: -fPIC -fPIE
On Wed, Nov 14, 2012 at 5:36 AM, Richard Earnshaw <rearnsha@arm.com> wrote:
> On 13/11/12 14:56, Ian Lance Taylor wrote:
>>
>> Currently -fPIC -fPIE seems to be the same as -fPIE. Unfortunately,
>> -fPIE -fPIC also seems to be the same as -fPIE. It seems to me that,
>> as is usual with conflicting options, we should use the one that
>> appears last on the command line.
>>
>> Do we have an existing mechanism in options processing for one option
>> to turn off another, where the options are not exact inverses? I
>> looked for one but I didn't see one. There is support for that for
>> options with the Mask property, but I don't see it for non-target
>> options.
>
> pic and pie are mostly the same, but the pre-emption rules are different.
> For fpie we don't have to permit pre-emption of global definitions.
>
> I hope we don't loose that distinction.
No, of course not. All I'm talking about here is option processing
when both -fPIC and -fPIE are provided. There is no change to the
normal case of providing just -fPIC or just -fPIE.
Ian