Add cross compilation support

Makefile

@@ -1,12 +1,12 @@
-CXXFLAGS=`wx-config --cxxflags` -Wall -Isrc -ggdb
+CXXFLAGS+=`wx-config --cxxflags` -Wall -Isrc -ggdb
 CXXFLAGS+=-I./lib/wxsqlite3-1.9.9/include
 CXXFLAGS+=-I./lib/freechart/include
 
-LDFLAGS=`wx-config --libs`
+LDFLAGS+=`wx-config --libs`
 LDFLAGS+=-L./lib/wxsqlite3-1.9.9/lib/ -lwxcode_gtk2u_wxsqlite3-2.8
 LDFLAGS+=-L./lib/freechart/lib -lwxcode_gtk2u_freechart-2.8
 
-CXX=g++
+CXX=$(PREFIX)g++
 
 SOURCES=$(wildcard src/model/*.cpp)
 SOURCES+=$(wildcard src/view/*.cpp)
@@ -34,5 +34,8 @@ check:
 kc: $(OBJS)
 	$(CXX) $(CXXFLAGS) $^ -o $@ $(LDFLAGS)
 
-generate_locals:
-	./generate_locales.sh
+generate_locales:
+	./tools/generate_locales.sh
+
+package:
+	./tools/package.sh