Fallout (mostly runtime library-related) from GCC version number change (take two)

[Paolo Carlini]

Zack Weinberg wrote:

>This line of fixincludes/configure.ac is backward
>
>AC_CONFIG_FILES(Makefile mkheaders.in:mkheaders.almost)
>
>it should read
>
>AC_CONFIG_FILES(Makefile mkheaders.almost:mkheaders.in)
>  
>
Ok, I'm going to try again with this change...

Thanks,
Paolo.