Let modules to change list of source files.

Makefile

@@ -11,9 +11,11 @@ LDFLAGS+=$(OPTFLAGS) $(EXPORTFLAGS) $(WARNFLAGS) $(LIBSFLAGS)
 CC=g++
 
 ifdef MODULE
--include makemod
+
+default: $(MODULE).so
 
 SOURCE = $(wildcard *.cpp)
+-include makemod
 DEPENDS = $(subst .cpp,.d,$(SOURCE))
 OBJECTS = $(subst .cpp,.o,$(SOURCE))
 
@@ -25,7 +27,7 @@ $(MODULE).so: $(OBJECTS)
 
 %.d: %.cpp
 	 $(CC) $(CPPFLAGS) -MM -MT $(subst .cpp,.o,$<) $< | sed 's%\(^.*\):%\1 $@ :%g' >$@
-	 
+
 include $(DEPENDS)
 
 clean:
@@ -36,11 +38,14 @@ distclean: clean
 
 else
 
+default: modules
+
 MODDIRS = $(wildcard modules/*)
 MODDIRS+= $(wildcard extramodules/*)
 
 MODSOURCE = $(wildcard modules/*/*.cpp extramodules/*/*.cpp)
 MODHEADERS = $(wildcard modules/*/*.h extramodules/*/*.h)
+-include $(wildcard modules/*/makemod) $(wildcard extramodules/*/makemod)
 MODOBJECTS = $(subst .cpp,.o,$(MODSOURCE))
 MODDEPS = $(subst .cpp,.d,$(MODSOURCE))
 
@@ -75,9 +80,6 @@ distclean:
 	 make -C src distclean
 	 rm -f bin/*
 	 rmdir bin
-
--include $(wildcard modules/*/makemod) $(wildcard extramodules/*/makemod)
-
 endif