I have made two installations of gnulib in a project, because I am using
both relocatable-prog and relocatable-lib-lgpl.

I have different modules installed for each, of course.

I just had a problem where my library would not compile, because it was
missing setlocale_null.h. GNULIB_SETLOCALE_NULL was indeed set to 1 by
configure.

The "library gnulib" uses only "locale", which does not depend on
setloacle-null, while the "program gnulib" uses "quote", which does.

I was able to work around this by adding "setlocale" to the library gnulib
(I could not use "quote", as that is a GPL module); but have I done
something wrong here? I can't see how I would fix this in general without
having two configure scripts…

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