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Date: Sun, 1 Jan 2012 23:45:51 +0000 (UTC) From: Thorsten Glaser <tg@...bsd.de> To: Jonathan Nieder <jrnieder@...il.com> cc: Nicholas Bellinger <nab@...ux-iscsi.org>, Greg Ungerer <gerg@...inux.org>, linux-kernel@...r.kernel.org, linux-m68k@...r.kernel.org, target-devel@...r.kernel.org Subject: Re: [m68k] in modpost: "strlen" [iscsi_target_mod.ko] undefined! (and others) Jonathan Nieder dixit: >Could you suggest a patch to arch/m68k/Makefile to do that? No, I patched it in debian/config/m68k/defines instead. I’d rather know why upstream doesn’t use -ffreestanding on _all_ architectures. A kernel is _not_ a hosted environment, and GCC is right to bring in problems like this. > Then drop -ffreestanding from the main Makefile because it isn't > needed anymore and implies -fno-builtin, which is wrong now. This is wrong, GCC builtins are only valid on hosted platforms, not on freestanding platforms. (Nobody prevents GCC from using a memcpy builtin that uses, say, SSE instructions, which must not be used inside kernel code, for an example on a better-known architecture.) A kernel must always be compiled freestanding, as do bootloaders. At least since the advent of gcc 3.[34]. bye, //mirabilos -- “It is inappropriate to require that a time represented as seconds since the Epoch precisely represent the number of seconds between the referenced time and the Epoch.” -- IEEE Std 1003.1b-1993 (POSIX) Section B.2.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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