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From: Anonymous <swell.k@gmail.com>
To: Konstantin Belousov <kib@FreeBSD.org>
References: <201101071435.p07EZkNU055560__46495.048949919$1294410977$gmane$org@svn.freebsd.org>
Date: Fri, 07 Jan 2011 18:05:16 +0300
In-Reply-To: <201101071435.p07EZkNU055560__46495.048949919$1294410977$gmane$org@svn.freebsd.org>
	(Konstantin Belousov's message of "Fri, 7 Jan 2011 14:35:46 +0000
	(UTC)")
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Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org
Subject: Re: svn commit: r217101 - head/lib/libcompiler_rt
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Konstantin Belousov <kib@FreeBSD.org> writes:

> Author: kib
> Date: Fri Jan  7 14:35:45 2011
> New Revision: 217101
> URL: http://svn.freebsd.org/changeset/base/217101
>
> Log:
>   On amd64 and i386, force assembler to mark objects compiled from the
>   assembler source for libcompiler_rt as not needed executable stack. This
>   is done with a hammer instead of properly marking each assembly file
>   with section .note.GNU-stack to avoid modifying contributed source.
>   
>   Discussed with:	ed
>
> Modified:
>   head/lib/libcompiler_rt/Makefile
>
> Modified: head/lib/libcompiler_rt/Makefile
> ==============================================================================
> --- head/lib/libcompiler_rt/Makefile	Fri Jan  7 14:32:29 2011	(r217100)
> +++ head/lib/libcompiler_rt/Makefile	Fri Jan  7 14:35:45 2011	(r217101)
> @@ -156,4 +156,10 @@ SYMLINKS+=libcompiler_rt_p.a ${LIBDIR}/l
>  . endif
>  .endif
>  
> +.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
> +AFLAGS+=--noexecstack
> +ACFLAGS+=-Wl,a,--noexecstack
> +.endif

Typo? -Wl,a,--foo vs. -Wa,--foo. From gcc(1) manpage

       Assembler Option
           -Wa,option  -Xassembler option

       Linker Options
           -Wl,option  -Xlinker option