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    SubjectRe: m68k: main.c:(.init.text+0x730): undefined reference to `strlen'
    [Adrian Bunk - Wed, May 14, 2008 at 06:30:59PM +0300]
    | On Wed, May 14, 2008 at 04:28:24PM +0200, Andreas Schwab wrote:
    | > Adrian Bunk <bunk@kernel.org> writes:
    | >
    | > > Or replace all the strlen stuff in include/asm-m68k/string.h with a
    | >
    | > I don't think the strlen macros has any influence in this case (it
    | > already uses __builtin_strlen anyway).
    |
    | The problem is that it sets __HAVE_ARCH_STRLEN, and therefore the
    | out-of-line function in lib/string.c is not built.
    |
    | That breaks when gcc replaces a call to a different function with a call
    | to strlen().
    |
    | > I'd rather guess that gcc is
    | > expanding strncat internally to something involving strlen with
    | > non-constant argument,
    |
    | We agree on this one.
    |
    | > although I cannot see how that can happen from a
    | > quick look.
    |
    | It isn't the first time we have these problems in the kernel...
    |
    | > Andreas.
    |
    | cu
    | Adrian
    |
    | --
    |
    | "Is there not promise of rain?" Ling Tan asked suddenly out
    | of the darkness. There had been need of rain for many days.
    | "Only a promise," Lao Er said.
    | Pearl S. Buck - Dragon Seed
    |
    |

    Adrian, I've just sent the updated patch, and accidentally forget
    to CC you - please take a look on http://lkml.org/lkml/2008/5/14/267

    - Cyrill -


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