Build rule for static linking and some comments.

environment.py

@@ -143,7 +143,7 @@ class GnuCXXCompiler(CXXCompiler):
         return 'gch'
 
 class ArLinker():
-    std_flags = ['cr']
+    std_flags = ['csr']
     
     def __init__(self, exelist):
         self.exelist = exelist

generators.py

@@ -59,9 +59,28 @@ class NinjaGenerator(Generator):
     def generate(self):
         outfilename = os.path.join(self.environment.get_build_dir(), self.ninja_filename)
         outfile = open(outfilename, 'w')
+        outfile.write('# This is the build file for project "%s"\n' % self.build.get_project())
+        outfile.write('# It is autogenerated. Do not edit by hand.\n\n')
         self.generate_rules(outfile)
     
     def generate_rules(self, outfile):
+        self.generate_compile_rules(outfile)
+        self.generate_link_rules(outfile)
+
+    def generate_link_rules(self, outfile):
+        outfile.write('# Rules for linking.\n\n')
+        static_linker = self.build.static_linker
+        rule = 'rule STATIC_LINKER\n'
+        command = ' command = %s %s $out $LINK_FLAGS $in\n' % \
+        (' '.join(static_linker.get_exelist()),\
+         ' '.join(static_linker.get_std_link_flags()))
+        description = ' description = Static linking library $out\n\n'
+        outfile.write(rule)
+        outfile.write(command)
+        outfile.write(description)
+
+    def generate_compile_rules(self, outfile):
+        outfile.write('# Rules for compiling.\n\n')
         for compiler in self.build.compilers:
             langname = compiler.get_language()
             rule = 'rule %s_COMPILER\n' % langname
@@ -69,7 +88,7 @@ class NinjaGenerator(Generator):
             (' '.join(compiler.get_exelist()),\
              ' '.join(compiler.get_output_flags()),\
              ' '.join(compiler.get_compile_only_flags()))
-            description = ' description = compiling %s object' % langname
+            description = ' description = Compiling object %s' % langname
             outfile.write(rule)
             outfile.write(command)
             outfile.write(description)