diff --git a/Makefile b/Makefile
index 487e02e..3e5c9e0 100644
--- a/Makefile
+++ b/Makefile
@@ -4,24 +4,35 @@ SUBDIRS	= include src tools
 RM	= rm -f
 LN	= ln -f
 TAR	= tar
+TGZEXT	= .tar.gz
 MKDIR	= mkdir -m 0755 -p
 
 
 all: subdirs
 
 subdirs:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE)) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		([ -d "$(OBJDIR)$$i" ] || $(MKDIR) -- "$(OBJDIR)$$i") && \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/"; \
+		else $(MAKE); fi) || exit; done
 
 clean:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) clean) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/" clean; \
+		else $(MAKE) clean; fi) || exit; done
 
 distclean:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) distclean) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/" distclean; \
+		else $(MAKE) distclean; fi) || exit; done
 
 dist:
 	$(RM) -r -- $(OBJDIR)$(PACKAGE)-$(VERSION)
 	$(LN) -s -- "$$PWD" $(OBJDIR)$(PACKAGE)-$(VERSION)
-	@cd $(OBJDIR). && $(TAR) -czvf $(OBJDIR)$(PACKAGE)-$(VERSION).tar.gz -- \
+	@cd $(OBJDIR). && $(TAR) -czvf $(PACKAGE)-$(VERSION)$(TGZEXT) -- \
 		$(PACKAGE)-$(VERSION)/include/GToolkit.h \
 		$(PACKAGE)-$(VERSION)/include/Makefile \
 		$(PACKAGE)-$(VERSION)/include/project.conf \
@@ -44,20 +55,26 @@ dist:
 	$(RM) -- $(OBJDIR)$(PACKAGE)-$(VERSION)
 
 distcheck: dist
-	$(TAR) -xzvf $(OBJDIR)$(PACKAGE)-$(VERSION).tar.gz
+	$(TAR) -xzvf $(OBJDIR)$(PACKAGE)-$(VERSION)$(TGZEXT)
 	$(MKDIR) -- $(PACKAGE)-$(VERSION)/objdir
 	$(MKDIR) -- $(PACKAGE)-$(VERSION)/destdir
-	(cd "$(PACKAGE)-$(VERSION)" && $(MAKE) OBJDIR="$$PWD/objdir/")
-	(cd "$(PACKAGE)-$(VERSION)" && $(MAKE) OBJDIR="$$PWD/objdir/" DESTDIR="$$PWD/destdir" install)
-	(cd "$(PACKAGE)-$(VERSION)" && $(MAKE) OBJDIR="$$PWD/objdir/" DESTDIR="$$PWD/destdir" uninstall)
-	(cd "$(PACKAGE)-$(VERSION)" && $(MAKE) OBJDIR="$$PWD/objdir/" distclean)
-	(cd "$(PACKAGE)-$(VERSION)" && $(MAKE) dist)
+	cd "$(PACKAGE)-$(VERSION)" && $(MAKE) OBJDIR="$$PWD/objdir/"
+	cd "$(PACKAGE)-$(VERSION)" && $(MAKE) OBJDIR="$$PWD/objdir/" DESTDIR="$$PWD/destdir" install
+	cd "$(PACKAGE)-$(VERSION)" && $(MAKE) OBJDIR="$$PWD/objdir/" DESTDIR="$$PWD/destdir" uninstall
+	cd "$(PACKAGE)-$(VERSION)" && $(MAKE) OBJDIR="$$PWD/objdir/" distclean
+	cd "$(PACKAGE)-$(VERSION)" && $(MAKE) dist
 	$(RM) -r -- $(PACKAGE)-$(VERSION)
 
 install:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) install) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/" install; \
+		else $(MAKE) install; fi) || exit; done
 
 uninstall:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) uninstall) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/" uninstall; \
+		else $(MAKE) uninstall; fi) || exit; done
 
 .PHONY: all subdirs clean distclean dist distcheck install uninstall
diff --git a/include/Makefile b/include/Makefile
index 83f7c77..5cd62db 100644
--- a/include/Makefile
+++ b/include/Makefile
@@ -12,21 +12,37 @@ INCLUDEDIR= $(PREFIX)/include
 all: subdirs
 
 subdirs:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE)) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		([ -d "$(OBJDIR)$$i" ] || $(MKDIR) -- "$(OBJDIR)$$i") && \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/"; \
+		else $(MAKE); fi) || exit; done
 
 clean:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) clean) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/" clean; \
+		else $(MAKE) clean; fi) || exit; done
 
 distclean:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) distclean) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/" distclean; \
+		else $(MAKE) distclean; fi) || exit; done
 
 install:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) install) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/" install; \
+		else $(MAKE) install; fi) || exit; done
 	$(MKDIR) $(DESTDIR)$(INCLUDEDIR)
 	$(INSTALL) -m 0644 GToolkit.h $(DESTDIR)$(INCLUDEDIR)/GToolkit.h
 
 uninstall:
-	@for i in $(SUBDIRS); do (cd "$$i" && $(MAKE) uninstall) || exit; done
+	@for i in $(SUBDIRS); do (cd "$$i" && \
+		if [ -n "$(OBJDIR)" ]; then \
+		$(MAKE) OBJDIR="$(OBJDIR)$$i/" uninstall; \
+		else $(MAKE) uninstall; fi) || exit; done
 	$(RM) -- $(DESTDIR)$(INCLUDEDIR)/GToolkit.h
 
 .PHONY: all subdirs clean distclean install uninstall
diff --git a/src/Makefile b/src/Makefile
index 61e522b..9a33a18 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,4 +1,4 @@
-TARGETS	= $(OBJDIR)libGToolkit.a $(OBJDIR)libGToolkit.so.0.0 $(OBJDIR)libGToolkit.so.0 $(OBJDIR)libGToolkit.so
+TARGETS	= $(OBJDIR)libGToolkit.a $(OBJDIR)libGToolkit$(SOEXT).0.0 $(OBJDIR)libGToolkit$(SOEXT).0 $(OBJDIR)libGToolkit$(SOEXT)
 OBJDIR	=
 PREFIX	= /usr/local
 DESTDIR	=
@@ -8,9 +8,12 @@ CPPFLAGSF= -I ../include
 CPPFLAGS=
 CFLAGSF	= -W `pkg-config --cflags gl`
 CFLAGS	= -Wall -fPIC -g -O2 -pedantic
+EXEEXT	=
 AR	= ar
+ARFLAGS	= -rc
 RANLIB	= ranlib
 CCSHARED= $(CC) -shared
+SOEXT	= .so
 RM	= rm -f
 LN	= ln -f
 MKDIR	= mkdir -m 0755 -p
@@ -24,13 +27,17 @@ libGToolkit_CFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
 libGToolkit_LDFLAGS = $(LDFLAGSF) $(LDFLAGS) `pkg-config --libs gl`
 
 $(OBJDIR)libGToolkit.a: $(libGToolkit_OBJS)
-	$(AR) -rc $(OBJDIR)libGToolkit.a $(libGToolkit_OBJS)
+	$(AR) $(ARFLAGS) $(OBJDIR)libGToolkit.a $(libGToolkit_OBJS)
 	$(RANLIB) $(OBJDIR)libGToolkit.a
 
-$(OBJDIR)libGToolkit.so.0.0 $(OBJDIR)libGToolkit.so.0 $(OBJDIR)libGToolkit.so: $(libGToolkit_OBJS)
-	$(CCSHARED) -o $(OBJDIR)libGToolkit.so.0.0 -Wl,-soname,libGToolkit.so.0 $(libGToolkit_OBJS) $(libGToolkit_LDFLAGS)
-	$(LN) -s -- libGToolkit.so.0.0 $(OBJDIR)libGToolkit.so.0
-	$(LN) -s -- libGToolkit.so.0.0 $(OBJDIR)libGToolkit.so
+$(OBJDIR)libGToolkit$(SOEXT).0.0: $(libGToolkit_OBJS)
+	$(CCSHARED) -o $(OBJDIR)libGToolkit$(SOEXT).0.0 -Wl,-soname,libGToolkit$(SOEXT).0 $(libGToolkit_OBJS) $(libGToolkit_LDFLAGS)
+
+$(OBJDIR)libGToolkit$(SOEXT).0: $(OBJDIR)libGToolkit$(SOEXT).0.0
+	$(LN) -s -- libGToolkit$(SOEXT).0.0 $(OBJDIR)libGToolkit$(SOEXT).0
+
+$(OBJDIR)libGToolkit$(SOEXT): $(OBJDIR)libGToolkit$(SOEXT).0.0
+	$(LN) -s -- libGToolkit$(SOEXT).0.0 $(OBJDIR)libGToolkit$(SOEXT)
 
 $(OBJDIR)common.o: common.c
 	$(CC) $(libGToolkit_CFLAGS) -o $(OBJDIR)common.o -c common.c
@@ -50,14 +57,14 @@ distclean: clean
 install: $(TARGETS)
 	$(MKDIR) $(DESTDIR)$(PREFIX)/lib
 	$(INSTALL) -m 0644 $(OBJDIR)libGToolkit.a $(DESTDIR)$(PREFIX)/lib/libGToolkit.a
-	$(INSTALL) -m 0755 $(OBJDIR)libGToolkit.so.0.0 $(DESTDIR)$(PREFIX)/lib/libGToolkit.so.0.0
-	$(LN) -s -- libGToolkit.so.0.0 $(DESTDIR)$(PREFIX)/lib/libGToolkit.so.0
-	$(LN) -s -- libGToolkit.so.0.0 $(DESTDIR)$(PREFIX)/lib/libGToolkit.so
+	$(INSTALL) -m 0755 $(OBJDIR)libGToolkit$(SOEXT).0.0 $(DESTDIR)$(PREFIX)/lib/libGToolkit$(SOEXT).0.0
+	$(LN) -s -- libGToolkit$(SOEXT).0.0 $(DESTDIR)$(PREFIX)/lib/libGToolkit$(SOEXT).0
+	$(LN) -s -- libGToolkit$(SOEXT).0.0 $(DESTDIR)$(PREFIX)/lib/libGToolkit$(SOEXT)
 
 uninstall:
 	$(RM) -- $(DESTDIR)$(PREFIX)/lib/libGToolkit.a
-	$(RM) -- $(DESTDIR)$(PREFIX)/lib/libGToolkit.so.0.0
-	$(RM) -- $(DESTDIR)$(PREFIX)/lib/libGToolkit.so.0
-	$(RM) -- $(DESTDIR)$(PREFIX)/lib/libGToolkit.so
+	$(RM) -- $(DESTDIR)$(PREFIX)/lib/libGToolkit$(SOEXT).0.0
+	$(RM) -- $(DESTDIR)$(PREFIX)/lib/libGToolkit$(SOEXT).0
+	$(RM) -- $(DESTDIR)$(PREFIX)/lib/libGToolkit$(SOEXT)
 
 .PHONY: all clean distclean install uninstall
diff --git a/tools/Makefile b/tools/Makefile
index d426ba3..233c672 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -1,4 +1,4 @@
-TARGETS	= $(OBJDIR)test
+TARGETS	= $(OBJDIR)test$(EXEEXT)
 OBJDIR	=
 PREFIX	= /usr/local
 DESTDIR	=
@@ -9,6 +9,7 @@ CPPFLAGSF= -I ../include
 CPPFLAGS=
 CFLAGSF	= -W
 CFLAGS	= -Wall -fPIC -g -O2 -pedantic
+EXEEXT	=
 RM	= rm -f
 LN	= ln -f
 MKDIR	= mkdir -m 0755 -p
@@ -21,8 +22,8 @@ test_OBJS = $(OBJDIR)test.o
 test_CFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
 test_LDFLAGS = $(LDFLAGSF) $(LDFLAGS) -L$(OBJDIR). -L../src -L $(PREFIX)/lib -Wl,-rpath,$(PREFIX)/lib -lGToolkit
 
-$(OBJDIR)test: $(test_OBJS)
-	$(CC) -o $(OBJDIR)test $(test_OBJS) $(test_LDFLAGS)
+$(OBJDIR)test$(EXEEXT): $(test_OBJS)
+	$(CC) -o $(OBJDIR)test$(EXEEXT) $(test_OBJS) $(test_LDFLAGS)
 
 $(OBJDIR)test.o: test.c ../include/GToolkit.h
 	$(CC) $(test_CFLAGS) -o $(OBJDIR)test.o -c test.c