Fix cinaps on arm32

Closes ocaml#4069

When `dynlink:false` is passed, the ARM backend emits MOVW/MOVT
instructions which have relocations incompatible with PIC code.
This is similar to ocaml#2527 (ocaml issue: ocaml/ocaml#8867).

Signed-off-by: Etienne Millon <me@emillon.org>

CHANGES.md

@@ -108,6 +108,8 @@ Unreleased
 - Configurator: fix a bug introduced in 2.6.0 where the configurator V1 API doesn't work at 
   all when used outside of dune. (#4046, @aalekseyev)
 
+- Fix cinaps on arm32 by not passing `-nodynlink` (#4081, fixes #4069, @emillon)
+
 2.7.1 (2/09/2020)
 -----------------
 

src/dune_rules/cinaps.ml

@@ -101,7 +101,7 @@ let gen_rules sctx t ~dir ~scope =
       ~requires_compile:(Lib.Compile.direct_requires compile_info)
       ~requires_link:(Lib.Compile.requires_link compile_info)
       ~flags:(Ocaml_flags.of_list [ "-w"; "-24" ])
-      ~js_of_ocaml:None ~dynlink:false ~package:None
+      ~js_of_ocaml:None ~dynlink:true ~package:None
   in
   Exe.build_and_link cctx
     ~program:{ name; main_module_name; loc }