* Improved Nix. Resources (package descriptors and other source

files) are now referenced using their cryptographic hashes.  

  This ensures that if two package descriptors have the same contents,
  then they describe the same package.  This property is not as
  trivial as it sounds: generally import relations cause this property
  not to hold w.r.t. temporality.  But since imports also use hashes
  to reference other packages, equality follows by induction.

svn path=/nix/trunk/pkg/; revision=5

pkg/aterm-2.0-build.sh

@@ -0,0 +1,13 @@
+#! /bin/sh
+
+export PATH=$utils/bin
+export LIBRARY_PATH=$glibc/lib
+export CC=$gcc/bin/gcc
+export CFLAGS="-isystem $glibc/include -isystem $kernel/include"
+
+top=`pwd`
+tar xvfz $src
+cd aterm-2.0
+./configure --prefix=$top
+make
+make install

pkg/aterm-2.0.nix

@@ -0,0 +1,11 @@
+# Dependencies.
+utils <- 5703121fe19cbeeaee7edd659cf4a25b # prog-bootstrap
+gcc <- 02212b3dc4e50349376975367d433929 # gcc-bootstrap
+glibc <- c0ce03ee0bab298babbe7e3b6159d36c # glibc-bootstrap
+kernel <- 3dc8333a2c2b4d627b892755417acf89 # kernel-bootstrap
+
+# Original sources.
+src = 853474e4bcf4a85f7d38a0676b36bded # aterm-2.0.tar.gz
+
+# Build script.
+build = ee7ae4ade69f846d2385871bf532ef7e # aterm-2.0-build.sh