[PATCH] tests: add compatibility layer

[David Bremner]

mp39590 at gmail.com writes:

>  
> +# OS independent functions
> +#
> +# Alias native BSD utilities to usable GNU equivalents.
> +case `uname` in
> +FreeBSD)
> +	# allow using aliases in scripts
> +	shopt -s expand_aliases
> +
> +	alias date=gdate
> +	alias base64=gbase64
> +	alias gdb=$BSD_GDB
> +	alias wc=gwc
> +	alias sed="gsed"
> +	alias sha256sum=gsha256sum
> +	;;
> +esac
> +

What about adding (most of) this to sh.config by the configure script?
I'd like to centralize all hacky platform detection there.

Also, why is gsed in quotes but none of the others are?