X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;ds=sidebyside;f=virt-ctrl%2Fmingw-gcc-wrapper.ml;fp=virt-ctrl%2Fmingw-gcc-wrapper.ml;h=21cdb8f71651af5389fb3ba8bacadaae53bf8ea2;hb=6f3635fe4dc9989745d154c8b346c47e4d384121;hp=0000000000000000000000000000000000000000;hpb=8dcda6c7457eca53d8d1e10b282a0cb77201899e;p=virt-top.git

diff --git a/virt-ctrl/mingw-gcc-wrapper.ml b/virt-ctrl/mingw-gcc-wrapper.ml
new file mode 100755
index 0000000..21cdb8f
--- /dev/null
+++ b/virt-ctrl/mingw-gcc-wrapper.ml
@@ -0,0 +1,70 @@
+(* Wrapper around 'gcc'.  On MinGW, this wrapper understands the '@...'
+ * syntax for extending the command line.
+ *)
+
+open Printf
+open Unix
+
+let (//) = Filename.concat
+
+(* Substitute any @... arguments with the file content. *)
+let rec input_all_lines chan =
+  try
+    let line = input_line chan in
+    line :: input_all_lines chan
+  with
+    End_of_file -> []
+
+let argv = Array.map (
+  fun arg ->
+    if arg.[0] = '@' then (
+      let chan = open_in (String.sub arg 1 (String.length arg - 1)) in
+      let lines = input_all_lines chan in
+      close_in chan;
+      lines
+    ) else
+      [arg]
+) Sys.argv
+
+let argv = Array.to_list argv
+let argv = List.flatten argv
+
+(* Find the real gcc.exe on $PATH, but ignore any '.' elements in the path.
+ * Note that on Windows, $PATH is split with ';' characters.
+ *)
+let rec split_find str sep f =
+  try
+    let i = String.index str sep in
+    let n = String.length str in
+    let str, str' = String.sub str 0 i, String.sub str (i+1) (n-i-1) in
+    match f str with
+    | None -> split_find str' sep f  (* not found, keep searching *)
+    | Some found -> found
+  with
+    Not_found ->
+      match f str with
+      | None -> raise Not_found (* not found at all *)
+      | Some found -> found
+
+let exists filename =
+  try access filename [F_OK]; true with Unix_error _ -> false
+
+let gcc =
+  split_find (Sys.getenv "PATH") ';'
+    (function
+     | "." -> None (* ignore current directory in path *)
+     | path ->
+       let gcc = path // "gcc.exe" in
+       if exists gcc then Some gcc else None)
+
+(* Finally execute the real gcc with the full argument list.
+ * Can't use execv here because then the parent process (ocamlopt) thinks
+ * that this process has finished and deletes all the temp files.  Stupid
+ * Windoze!
+ *)
+let _ =
+  let argv = List.map Filename.quote (List.tl argv) in
+  let cmd = String.concat " " (gcc :: argv) in
+  eprintf "mingw-gcc-wrapper: %s\n%!" cmd;
+  let r = Sys.command cmd in
+  exit r