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Never ask for -mpopcount on macosx #187

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12 changes: 8 additions & 4 deletions src/discover/discover.ml
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Original file line number Diff line number Diff line change
Expand Up @@ -14,11 +14,15 @@ let () =
main
~name:"discover"
~args:[ "-o", Set_string output, "FILENAME output file" ]
(fun _c ->
(fun c ->
let f,oc = Filename.open_temp_file "baseconf" ".c" in
let has_popcnt =
Fun.protect ~finally:(fun () -> close_out oc; Sys.remove f)
(fun () -> Out_channel.(output_string oc program; flush oc);
Sys.command (Printf.sprintf "cc %s -mpopcnt -o /dev/null >/dev/null 2>&1" f) = 0) in
match ocaml_config_var_exn c "system" with
| "macosx" -> false
| _ ->
Fun.protect ~finally:(fun () -> close_out oc; Sys.remove f)
(fun () -> Out_channel.(output_string oc program; flush oc);
Sys.command (Printf.sprintf "cc %s -mpopcnt -o /dev/null >/dev/null 2>&1" f) = 0)
in
Flags.write_sexp !output (if has_popcnt then [ "-mpopcnt" ] else []))
;;