Merge remote-tracking branch 'origin/pr/64' into compilation-flags

Author: mmottl

CHANGELOG.md

@@ -7,6 +7,8 @@
   finding a reference counting bug when handling exceptions.
 - Fixed collation link freeing bug. Thanks to `o3-mini-high` for suggesting the
   fix without even being prompted (minus-shot).
+- Remove `-O2` compiler flag since optimization flags owned by and can conflict
+  with `ocamlc -config`.
 
 ## [5.3.0] - 2025-01-20
 

lib/config/discover.ml

@@ -71,9 +71,8 @@ let split_ws str =
 let add_compiler_args ~is_msvc ~cflags ~libs =
   let module C = Configurator.V1 in
   match is_msvc with
-  | true -> { C.Pkg_config.cflags = cflags @ [ "/O2" ]; libs }
-  | false ->
-      { C.Pkg_config.cflags = cflags @ [ "-O2"; "-fPIC"; "-DPIC" ]; libs }
+  | true -> { C.Pkg_config.cflags; libs }
+  | false -> { C.Pkg_config.cflags = cflags @ [ "-fPIC"; "-DPIC" ]; libs }
 
 let () =
   let module C = Configurator.V1 in