Add libffi, a foreign function interface library.

svn path=/nixpkgs/trunk/; revision=11505

pkgs/development/libraries/libffi/default.nix

@@ -0,0 +1,34 @@
+{ fetchurl, stdenv }:
+
+stdenv.mkDerivation rec {
+  name = "libffi-3.0.5";
+  src = fetchurl {
+    url = "ftp://sourceware.org/pub/libffi/${name}.tar.gz";
+    sha256 = "1i0ms6ilhjzz0691nymnvs5a3b5lf95n6p99l65z2zn83rd7pahf";
+  };
+
+  doCheck = true;
+
+  meta = {
+    description = "libffi, a foreign function call interface library";
+
+    longDescription = ''
+      The libffi library provides a portable, high level programming
+      interface to various calling conventions.  This allows a
+      programmer to call any function specified by a call interface
+      description at run-time.
+
+      FFI stands for Foreign Function Interface.  A foreign function
+      interface is the popular name for the interface that allows code
+      written in one language to call code written in another
+      language.  The libffi library really only provides the lowest,
+      machine dependent layer of a fully featured foreign function
+      interface.  A layer must exist above libffi that handles type
+      conversions for values passed between the two languages.
+    '';
+
+    homepage = http://sources.redhat.com/libffi/;
+
+    license = "http://sources.redhat.com/cgi-bin/cvsweb.cgi/~checkout~/libffi/LICENSE?rev=1.6&content-type=text/plain&cvsroot=libffi&only_with_tag=MAIN";
+  };
+}

pkgs/top-level/all-packages.nix

@@ -2709,6 +2709,10 @@ let pkgs = rec {
 
   libextractor = libextractorFun null;
 
+  libffi = import ../development/libraries/libffi {
+    inherit fetchurl stdenv;
+  };
+
   libgcrypt = import ../development/libraries/libgcrypt {
     inherit fetchurl stdenv libgpgerror;
   };