[PULL] button mapping fix and unconstify patches

[Gaetan Nadon]

On 14-02-12 12:57 PM, Keith Packard wrote:
> This function is supposed to be automatically replaced with os/strlcpy.c
> when not present in your C library.
>
> Something appears to be amiss here; I don't have strlcpy *or* strlcat in
> my glibc, and so configure correctly adds os/strlcpy.c and os/strlcat.c
> to the build.
>
I cannot reproduce the problem anymore. I retraced my commands from the
terminal, run make CC="gcc -D_FORTIFY_SOURCE=2" again, this time it works.

This shows it is already defined:

    nadon at memsize:~/xorg/src/app/xclock$ gcc -dM -E - < /dev/null | grep
    FORTIFY
    #define _FORTIFY_SOURCE 2

There does not seem to be any harm in defining for all builds. If it is
not supported, it will be ignored.

Let me know, and I can create a patch to add this in util-macros. It can
be conditionally added using AC_CHECK_DECLS. If it is already define, it
won't be added.

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