ocaml-gsl @0.6.0: error: use of undeclared identifier 'caml__frame'

[ryandesign (Ryan Carsten Schmidt)]

​https://build.macports.org/builders/ports-10.13_x86_64-builder/builds/15264

ocamlc -ccopt '-I/opt/local/include -DHAVE_INLINE -DHAVE_FENV -g -O2 ' -c mlgsl_error.c
mlgsl_error.c:37:3: error: use of undeclared identifier 'caml__frame'
  CAMLlocal2(exn_msg, exn_arg);
  ^
/opt/local/lib/ocaml/caml/memory.h:309:3: note: expanded from macro 'CAMLlocal2'
  CAMLxparam2 (x, y)
  ^
/opt/local/lib/ocaml/caml/memory.h:236:12: note: expanded from macro 'CAMLxparam2'
    (void) caml__frame, \
           ^
1 error generated.

[ryandesign (Ryan Carsten Schmidt)]

Just a reminder that ​this problem remains.

[pmetzger (Perry E. Metzger)]

I'll probably do a pass in mid-July during which I'm going to update a bunch of the OCaml infrastructure and deal with this and related issues at that time. Feel free to yell at me if that doesn't happen; now that writable strings have been deprecated for a long time and ocamlp4 has been dead for a year, it's time to fix everything.