[Bug ld/29263] /usr/bin/ld: warning: /usr/lib/gcc/hppa-linux-gnu/11/../../../hppa-linux-gnu/crtn.o: missing .note.GNU-stack section implies executable stack

[nickc at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29263

--- Comment #6 from Nick Clifton <nickc at redhat dot com> ---
(In reply to dave.anglin from comment #3)
Hi Dave,

> Unfortunately, this doesn't happen on hppa-linux because we have:
> 
> /* It's not possible to enable GNU_stack notes since the kernel needs
>     an executable stack for signal returns and syscall restarts.  */
> 
> #undef NEED_INDICATE_EXEC_STACK
> #define NEED_INDICATE_EXEC_STACK 0

> I can't just enable the generation of GNU_stack notes since old kernels are
> still prevalent.

OK, so if you need to support older kernels, then is it possible for you to use
the configure option  --enable-warn-execstack=no instead ?


> --no-warn-execstack doesn't suppress all the warnings:
> 
> dave@mx3210:~/shmat$ gcc main.c -Wl,--no-warn-execstack
> /usr/bin/ld: warning: a.out has a LOAD segment with RWX permissions

That warning can be disabled with --no-warn-rwx-segments and disabled by
configuring with --enable-warn-rwx-segments=no


> What is best way to transition without causing a lot of disruption?

How about a patch like the one I am about to upload ?  It sets the defaults for
these two warnings to 'ignore' for HPPA targets.  (I do not know if it is
possible to determine the kernel version from the configuration string, so the
patch changes the default for all HPPA variants).

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