Replace ocamlbuild by a second-stage makefile to compile the OCaml code and produce the executables.

configure: add check for GNU make.

1 files changed, 112 insertions, 0 deletions

diff --git a/tools/modorder.ml b/tools/modorder.ml
new file mode 100644
index 00000000..34e157d0
--- /dev/null
+++ b/tools/modorder.ml
@@ -0,0 +1,112 @@
+(* *********************************************************************)
+(*                                                                     *)
+(*              The Compcert verified compiler                         *)
+(*                                                                     *)
+(*          Xavier Leroy, INRIA Paris-Rocquencourt                     *)
+(*                                                                     *)
+(*  Copyright Institut National de Recherche en Informatique et en     *)
+(*  Automatique.  All rights reserved.  This file is distributed       *)
+(*  under the terms of the GNU General Public License as published by  *)
+(*  the Free Software Foundation, either version 2 of the License, or  *)
+(*  (at your option) any later version.  This file is also distributed *)
+(*  under the terms of the INRIA Non-Commercial License Agreement.     *)
+(*                                                                     *)
+(* *********************************************************************)
+
+(* Parse dependencies generated by ocamldep and produce a linking order *)
+
+open Printf
+
+type status = Todo | Inprogress | Done
+
+type node = {
+  deps: string list;
+  result: string;
+  mutable status: status
+}
+
+(* Parsing *)
+
+let re_continuation_line = Str.regexp "\\(.*\\)\\\\[ \t]*$"
+
+let re_depend_line = Str.regexp "\\([^ ]+\\) *:\\(.*\\)$"
+
+let re_whitespace = Str.regexp "[ \t\n]+"
+
+let parse_dependencies depfile =
+  let deps = (Hashtbl.create 63 : (string, node) Hashtbl.t) in
+  let ic = open_in depfile in
+
+  let rec read_line () =
+    let l = input_line ic in
+    if Str.string_match re_continuation_line l 0 then begin
+      let l' = Str.matched_group 1 l in
+      l' ^ read_line ()
+    end else
+      l in
+
+  let enter_line l =
+    if not (Str.string_match re_depend_line l 0) then begin
+      eprintf "Warning: ill-formed dependency line '%s'\n" l
+    end else begin
+      let lhs = Str.matched_group 1 l
+      and rhs = Str.matched_group 2 l in
+      let node = {
+        deps = Str.split re_whitespace rhs;
+        result = rhs;
+        status = Todo
+      } in
+      Hashtbl.add deps lhs node
+    end in
+
+  begin try
+    while true do enter_line (read_line ()) done
+  with End_of_file ->
+    ()
+  end;
+  close_in ic;
+  deps
+
+(* Suffix of a file name *)
+
+let re_suffix = Str.regexp "\\.[a-zA-Z]+$"
+
+let filename_suffix s =
+  try
+    ignore (Str.search_forward re_suffix s 0); Str.matched_string s
+  with Not_found ->
+    ""
+
+(* Topological sorting *)
+
+let emit_dependencies deps targets =
+
+  let rec dsort target suff =
+    match (try Some(Hashtbl.find deps target) with Not_found -> None) with
+    | None -> ()
+    | Some node ->
+        match node.status with
+        | Done -> ()
+        | Inprogress ->
+            eprintf "Warning: cyclic dependency on '%s', ignored\n" target
+        | Todo ->
+            node.status <- Inprogress;
+            List.iter
+              (fun dep ->
+                  if Filename.check_suffix dep suff then dsort dep suff)
+              node.deps;
+            printf "%s " target;
+            node.status <- Done
+  in
+    Array.iter (fun t -> dsort t (filename_suffix t)) targets
+
+let _ =
+  if Array.length Sys.argv < 3 then begin
+    eprintf "Usage: modorder <dependency file> <target>...\n";
+    exit 2
+  end;
+  emit_dependencies
+    (parse_dependencies Sys.argv.(1))
+    (Array.sub Sys.argv 2 (Array.length Sys.argv - 2));
+  print_newline()
+