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Re: `exec shield' test in configure too strict?


From: Jan D.
Subject: Re: `exec shield' test in configure too strict?
Date: Mon, 4 Oct 2004 23:37:52 +0200


On Mon, Oct 04, 2004 at 05:04:26PM +0200, Jan D. wrote:
and so emacs refuses to configure -- but if disable this test by doing:

  $ make ac_cv_file__proc_sys_kernel_exec_shield=no

Then Emacs configures and dumps just fine, despite not using `setarch'.

Does that machine have a /proc/sys/kernel/exec-shield-randomize file?

Yes:

   $ cat /proc/sys/kernel/exec-shield-randomize
   1

Incredible, I expected it to be zero.  Too bad there is a lack of
documentation on this feature.  I do know that both the compiler and
linker are involved, so maybe they have not been modified on that
machine?  Anyway, I'll try to come up with a better test where we
check the heap start address explicitly.

        Jan D.





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