Added gettext tool.

SConstruct

@@ -73,7 +73,7 @@ opts.AddOptions(
 # Setup
 #
 
-env = Environment(tools=["tar"], options = opts)
+env = Environment(tools=["tar", "gettext"], options = opts, toolpath = ["scons"])
 if env["PLATFORM"] == "win32":
     env.Tool("mingw")
 else:
@@ -186,7 +186,7 @@ boost_test_dyn_link = boost_auto_test = False
 if 'test' in COMMAND_LINE_TARGETS:
     boost_test_dyn_link = boost_auto_test = conf.CheckBoost('unit_test_framework')
 
-have_msgfmt = env.WhereIs("msgfmt")
+have_msgfmt = env["MSGFMT"]
 if not have_msgfmt:
      env["nls"] = False
 if not have_msgfmt:

po/SConscript

@@ -132,9 +132,8 @@ if env["nls"]:
         linguas = map(lingua_re.findall, pos)
         for lingua in linguas:
             lingua = lingua[0]
-            env.Command(
-                os.path.join("../translations", lingua, "LC_MESSAGES", domain+".mo"),
-                os.path.join(domain, lingua + ".po"),
-                "msgfmt -c --statistics -o $TARGET $SOURCE"
+            env.Msgfmt(
+                os.path.join("../translations", lingua, "LC_MESSAGES", domain),
+                os.path.join(domain, lingua)
                 )
 

scons/gettext.py

@@ -0,0 +1,18 @@
+# vi: syntax=python:et:ts=4
+from os.path import join
+from SCons.Builder import Builder
+from SCons.Script  import *
+
+def exists():
+    return True
+
+def generate(env):
+    env.AppendENVPath("PATH", os.path.join(env["gettextdir"], "bin"))
+    env["MSGFMT"] = WhereIs("msgfmt")
+    msgfmt = Builder(
+        action = "$MSGFMT -c --statistics -o $TARGET $SOURCE",
+        src_suffix = ".po",
+        suffix = ".mo",
+        single_source = True
+        )
+    env["BUILDERS"]["Msgfmt"] = msgfmt