* stdenv.mkDerivation now takes an optional attribute "meta" that

contains arbitrary information about a package, like this:

  meta = {
    homepage = "http://gcc.gnu.org/";
    license = "GPL/LGPL";
    description = "GNU Compiler Collection, 4.0.x";
  };

  The "meta" attribute is not passed to the actual derivation
  operation, so it's not a dependency --- changes to "meta" attributes
  don't trigger a recompilation.

  Now we have to standardise some useful attributes ;-)

svn path=/nixpkgs/branches/usability/; revision=5024

pkgs/development/compilers/gcc-4.0-cross/default.nix

@@ -26,4 +26,10 @@ stdenv.mkDerivation {
   buildInputs = [binutilsCross];
   inherit kernelHeadersCross binutilsCross;
   platform = cross;
+
+  meta = {
+    homepage = "http://gcc.gnu.org/";
+    license = "GPL/LGPL";
+    description = "GNU Compiler Collection, 4.0.x (cross-compiler for " + cross + ")";
+  };
 }

pkgs/development/compilers/gcc-4.0/default.nix

@@ -15,4 +15,10 @@ stdenv.mkDerivation {
   # !!! apply only if noSysDirs is set
   patches = [./no-sys-dirs.patch];
   inherit noSysDirs langC langCC langF77 profiledCompiler;
+
+  meta = {
+    homepage = "http://gcc.gnu.org/";
+    license = "GPL/LGPL";
+    description = "GNU Compiler Collection, 4.0.x";
+  };
 }

pkgs/development/libraries/aterm/aterm-2.4.nix

@@ -6,4 +6,9 @@ stdenv.mkDerivation {
     url = http://nix.cs.uu.nl/dist/tarballs/aterm-2.4.2.tar.gz;
     md5 = "18617081dd112d85e6c4b1b552628114";
   };
+  meta = {
+    homepage = http://www.cwi.nl/htbin/sen1/twiki/bin/view/SEN1/ATerm;
+    license = "LGPL";
+    description = "Library for manipulation of term data structures in C";
+  };
 }