Explications

README.md

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+See https://discuss.ocaml.org/t/problem-to-compile-a-dll-on-mingw/3661/2
+
+for the short explanation.
+
+More in depth discussions:
+- the patch that explain why the behaviour changed:
+  https://github.com/ocaml/ocaml/pull/1535
+
+- a discussion which allow to understand the problem:
+  https://github.com/ocaml/ocaml/issues/6411
+
+
+I had two choices:
+- either use `eval $(ocaml-env cygwin)`
+- or add a `-link -static-libgcc` at link time
+
+The first solution works "for me": the PATH environment variable is modified on
+my computer, and things are working fine. But since my goal is to distribute the
+DLL to others, who do not necessarily have cygwin installed, I chose the second
+solution.
+
+# Branches
+- master : Do not work
+- solve_linking_problem : Solution