Initial support for loading dependency info from buildfiles

Also a new iteration on the overall architecture. Now, for the first time,
build can read the buildfile and build itself.

g++-4.9 -std=c++14 -g -I.. -o bd bd.cxx algorithm.cxx scope.cxx parser.cxx lexer.cxx target.cxx prerequisite.cxx rule.cxx native.cxx cxx/target.cxx cxx/rule.cxx process.cxx timestamp.cxx path.cxx

g++-4.9 -std=c++14 -g -I../../.. -o driver driver.cxx ../../../build/lexer.cxx

g++-4.9 -std=c++14 -g -I../../.. -o driver driver.cxx ../../../build/lexer.cxx ../../../build/parser.cxx ../../../build/scope.cxx ../../../build/target.cxx ../../../build/native.cxx ../../../build/prerequisite.cxx ../../../build/path.cxx ../../../build/timestamp.cxx

1 files changed, 32 insertions, 0 deletions

diff --git a/build/prerequisite.cxx b/build/prerequisite.cxx
new file mode 100644
index 0000000..8153a6c
--- /dev/null
+++ b/build/prerequisite.cxx
@@ -0,0 +1,32 @@
+// file      : build/prerequisite.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+#include <build/prerequisite>
+
+#include <ostream>
+
+#include <build/target> // target_type
+
+using namespace std;
+
+namespace build
+{
+  ostream&
+  operator<< (ostream& os, const prerequisite& p)
+  {
+    // @@ TODO: need to come up with a relative (to current) path.
+
+    return os << p.type.name << '{' << p.name << '}';
+  }
+
+  bool
+  operator< (const prerequisite& x, const prerequisite& y)
+  {
+    return
+      (x.type.id < y.type.id) ||
+      (x.type.id == y.type.id && x.name < y.name) ||
+      (x.type.id == y.type.id && x.name == y.name &&
+       x.directory < y.directory);
+  }
+}