slight more portable scons

SConstruct

@@ -8,6 +8,29 @@ if 'darwin' == os.sys.platform:
     env.Append(CPPPATH=['/opt/local/include'],
                LIBPATH=['/opt/local/lib'])
 
-env.Program('mount-gridfs', 'fs.cpp', LIBS=['mongoclient', 'boost_thread-mt',
-                                            'boost_filesystem-mt',
-                                            'boost_system-mt', 'fuse'])
+conf = Configure( env )
+libs = [ "mongoclient" , "fuse" ]
+boostLibs = [ "thread" , "filesystem" ]
+
+def checkLib( n ):
+    if conf.CheckLib( n ):
+        return True
+    print( "Error: can't find library: " + str( n ) )
+    Exit(-1)
+    return False
+
+for x in libs:
+    checkLib( x )
+
+def makeBoost( x ):
+    # this will have to get more complicated later
+    return "boost_" + x + "-mt";
+
+for x in boostLibs:
+    checkLib( makeBoost( x ) )
+
+conf.CheckLib( makeBoost( "system" ) )
+
+env = conf.Finish()
+
+env.Program('mount-gridfs', 'fs.cpp' )