Use CAMLextern in caml_ forward declarations #157
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This PR changes the
externattribute inextern caml_...to be exactly what OCaml uses (CAMLextern):https://github.com/ocaml/ocaml/blob/b0b5f92896002239491308d3f1651d6e548c109f/runtime/caml/misc.h#L123-L136
Fine Details
Without this change, on Windows 64-bit systems with OCaml bytecode you can get an obscure:
because
extern caml_leave_blocking_sectiongenerates the following pseudo-assembly:which does not work safely across DLL boundaries with flexdll.
The indirection introduced by
CAMLexternmakes the pseudo-assembly instead:which works well with flexdll.