From 2aae2af8452a4ba45721cfb32016313046826625 Mon Sep 17 00:00:00 2001
From: Graham Christensen <graham@grahamc.com>
Date: Mon, 14 Mar 2016 15:20:18 -0500
Subject: [PATCH] ilbc: extract-cfile.awk has fallen off the internet

Close #13923.
---
 pkgs/development/libraries/ilbc/default.nix   |  6 +----
 .../libraries/ilbc/extract-cfile.awk          | 24 +++++++++++++++++++
 2 files changed, 25 insertions(+), 5 deletions(-)
 create mode 100644 pkgs/development/libraries/ilbc/extract-cfile.awk

diff --git a/pkgs/development/libraries/ilbc/default.nix b/pkgs/development/libraries/ilbc/default.nix
index d77b5d46a79..0ea2949659c 100644
--- a/pkgs/development/libraries/ilbc/default.nix
+++ b/pkgs/development/libraries/ilbc/default.nix
@@ -3,11 +3,7 @@
 stdenv.mkDerivation rec {
   name = "ilbc-rfc3951";
 
-  script = fetchurl {
-    url = http://ilbcfreeware.org/documentation/extract-cfile.txt;
-    name = "extract-cfile.awk";
-    sha256 = "0md76qlszaras9grrxaq7xfxn1yikmz4qqgnjj6y50jg31yr5wyd";
-  };
+  script = ./extract-cfile.awk;
 
   rfc3951 = fetchurl {
     url = http://www.ietf.org/rfc/rfc3951.txt;
diff --git a/pkgs/development/libraries/ilbc/extract-cfile.awk b/pkgs/development/libraries/ilbc/extract-cfile.awk
new file mode 100644
index 00000000000..e4b07bc0896
--- /dev/null
+++ b/pkgs/development/libraries/ilbc/extract-cfile.awk
@@ -0,0 +1,24 @@
+BEGIN { srcname = "nothing"; }
+{ if (/^A\.[0-9][0-9]*\.* *[a-zA-Z][a-zA-Z_0-9]*\.[ch]/) {
+    if (srcname != "nothing")
+      close(srcname);
+    srcname = $2;
+    printf("creating source file %s\n", srcname);
+  }else if (srcname != "nothing") {
+    if (/Andersen,* *et* *al\./) 
+      printf("skipping %s\n", $0);
+    else if (//)
+      printf("skipping2 %s\n", $0);
+    else if (/Internet Low Bit Rate Codec *December 2004/)
+      printf("skipping3 %s\n", $0);
+    else if (/Authors' *Addresses/){
+      close(srcname);
+      exit;}
+    else
+      print $0 >> srcname;
+  }
+}
+END {
+  printf("ending file %s\n", srcname);
+  close(srcname);
+}