[testsuite] PATCH: Add check_effective_target_pie

[Rainer Orth]

"H.J. Lu" <hjl.tools@gmail.com> writes:

>> The new proc is bogus, unfortunately: there's already an existing
>> check_effective_target_pie that checks if a target can support PIE.  The
>> new one just overrides the previous one.  On targets supporting PIE
>> (like Darwin), but not defaulting to it, the PIE tests suddenly turn out
>> UNSUPPORTED.
>>
>> You should rename the new one to
>> e.g. check_effective_target_pie_default, update the single user, and
>> document it in sourcebuild.texi.
>
> I checked in this as an obvious fix.

I think pie_enabled is not a very descriptive name:

Index: doc/sourcebuild.texi
===================================================================
--- doc/sourcebuild.texi (revision 220617)
+++ doc/sourcebuild.texi (working copy)
@@ -1884,6 +1884,9 @@
 @item nonpic
 Target does not generate PIC by default.

+@item pie_enabled
+Target generates PIE by default.
+
 @item pcc_bitfield_type_matters
 Target defines @code{PCC_BITFIELD_TYPE_MATTERS}.

With -fpie, PIE is also enabled, just not the default without any
options.  Please either go with the pie_default I sugested or wait for
others to weigh in before rushing in another `obvious' fix.

Thanks.
	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University