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On 26 February 2011 18:41, David Manura <> wrote:
> On Sat, Feb 26, 2011 at 12:15 PM, Reuben Thomas <> wrote:
>> it looks as though it is easily possible to write
>> scripts that work in both 5.1 and 5.2, and probably quite feasible to
>> write scripts that work in 5.0-5.2.[...]
>> I was wondering whether this multi-version support is common-place, [...]
> LuaCOM had some compatibility macros that allowed it to compile under
> 4.0 and 5.0.  However, this is now largely removed, and only 5.1 and
> 5.2 are now supported.  Some compatibility macros for deprecated
> features are provided with standard Lua as well (LUA_COMPAT_ALL).
> Targeting both 5.1 and 5.2 require a few wrappers or code adjustments
> dealing with things like environments and LUA_GLOBALSINDEX, but it's
> quite doable.  I've even built 5.1 and 5.2 into the same binary (with
> e.g. "#define lua_newthread lua52_newthread" to avoid symbol clashes).
> A page has been dedicated to this topic:

Thanks. I've found an easy solution which is to change the behaviour
when you supply only one version number. Previously the first set the
minimum, and the second set the maximum; if the second was omitted it
was set to 1000; now it's set to minimum+1 which has the effect of
requiring exactly the "minimum" version. So,


does what you'd hope, and requires Lua 5.1.