R devel - Apr 2023 - setulb() from lbfgsb.c not exported

Hello,

It appears that the file ./appl/lbfgsb.c defines setulb() as a static
function, and it is included in optim.c, so setulb() is not exported
by the R library. I have some sofware that uses setulb() directly,
and I would prefer to avoid having to recompile this sofware to
export that function.

Is there any way to get access to setulb(), or must I use
the lower and upper params in optimix?

Thanks,
Dominick

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