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As part of this change I have written a couple of M4 macros. This not being something I have done before, any input is appreciated on style or if things can be done better.

Usage is:

If you don't specify a max then 17 is used. It works out what flags are available to modify the behavior of the C++ compiler to a different version of the standard and then defines the two macros:

As part of this change I have written a couple of M4 macros. This not being something I have done before. Any input is appreciated on style or if things can be done better.

Usage:

If you don't specify a max then 17 is used as the default. It works out what flags are available to modify the behavior of the C++ compiler to a different version of the standard and then defines the two macros:

I have been updating my build tools to optionally us autotools (autoconfig/automake/libtool etc.).

I have been updating my build tools to optionally use autotools (autoconfig/automake/libtool etc.).