flan dev's one-process build links the program and the compiler into one
-rdynamic executable, so it exports flan.rl/with-drawing -- the package's
defmacro compiled as an ordinary function, whose body was qualified at the
Ast level, after the quasiquote had already become a string literal. ELF
gives the executable precedence over a dlopened object, so the macro module
called the host's copy and (rl/with-drawing ...) expanded to an unqualified
begin-drawing the checker then refused. The module is self-contained, so
-Wl,-Bsymbolic is the whole fix.
merged_setup reports a Loc.Error as a diagnostic now, which is how the
failure had a location at all instead of an exception constructor after an
apparently successful build.
Joseph Ferano
65d14f42f0