test results with the 2.35 branch for several architectures

[Alan Modra]

On Wed, Jul 08, 2020 at 04:34:51PM +0200, Matthias Klose wrote:
> powerpc:
> Running /<<PKGBUILDDIR>>/ld/testsuite/ld-gc/gc.exp ...
> FAIL: Check --gc-section
> FAIL: Check --gc-section/-q
> FAIL: Check --gc-section/-r/-e
> FAIL: Check --gc-section/-r/-u

I don't see these failures.  Can you show ld.log for these tests?

> powerpc64:
> Running /<<PKGBUILDDIR>>/ld/testsuite/ld-ifunc/ifunc.exp ...
> FAIL: Run pr18841 with libpr18841b.so
> FAIL: Run pr18841 with libpr18841c.so
> FAIL: Run pr18841 with libpr18841bn.so (-z now)
> FAIL: Run pr18841 with libpr18841cn.so (-z now)

I don't see these failures using gcc-7.3.1 on RedHat FC27 or gcc-4.8.5
on FC28 when running the testsuite.  The test does do cross-module
calls from within an ifunc resolver, which is nasty since the called
function may not be relocated.  In this case the called function (zoo)
is just a stub so doesn't need relocating, but on ppc64 the function
descriptor for zoo in the executable won't be relocated at the time
the shared library ifunc resolver runs.  That means the test will fail
if your compiler generates PIEs by default.  I do get segfaults on
FC27 if I compile the executable as a PIE..

HJ, I think I should change the test to use NOPIE_LDFLAGS and
NOPIE_CFLAGS.  That shouldn't affect the original purpose of the test,
which was to ensure proper ifunc dynamic reloc sorting.

-- 
Alan Modra
Australia Development Lab, IBM