diff --git a/src/common.pri b/src/common.pri
new file mode 100644
index 0000000..0e2e84c
--- /dev/null
+++ b/src/common.pri
@@ -0,0 +1,12 @@
+INCLUDEPATH += ..
+
+CONFIG(debug) {
+    DESTDIR = ../../build/debug/
+    MAKEFILE = Makefile.debug
+} else {
+    DESTDIR = ../../build/release/
+    MAKEFILE = Makefile.release
+}
+
+release:DEFINES += NDEBUG
+
diff --git a/src/common_post.mk b/src/common_post.mk
deleted file mode 100644
index 14bc9d6..0000000
--- a/src/common_post.mk
+++ /dev/null
@@ -1,35 +0,0 @@
-OBJECTS = ${SOURCES:%.c=${OBJPATH}/%.o}
-
-ifeq (${BUILDMODE},debug)
-	CC_FLAGS += -g
-	CC_LDFLAGS += -g
-endif
-ifeq (${BUILDMODE},release)
-	CC_FLAGS += -O3 -DNDEBUG -Wno-unused-variable -Wno-unused-but-set-variable
-endif
-
-ifneq (,${LIBS})
-	CC_FLAGS += $(shell pkg-config --cflags ${LIBS})
-	CC_LDFLAGS += $(shell pkg-config --libs ${LIBS})
-endif
-
-CC_FLAGS += -fPIC -Wall -I${PROJECT_PATH}/src
-CC_LDFLAGS += -fPIC -lm
-
-all:prepare ${RESULT}
-
-prepare:
-	mkdir -p ${BUILDPATH}
-
-clean:
-	rm -f ${OBJECTS}
-	rm -f ${RESULT}
-
-${OBJPATH}/%.o:%.c ${HEADERS}
-	mkdir -p `dirname $@`
-	${CC} -c ${CC_FLAGS} $< -o $@
-
-${RESULT}:${OBJECTS}
-	${CC} $^ ${CC_LDFLAGS} -o $@
-
-.PHONY:all clean prepare
diff --git a/src/common_pre.mk b/src/common_pre.mk
deleted file mode 100644
index 678892b..0000000
--- a/src/common_pre.mk
+++ /dev/null
@@ -1,11 +0,0 @@
-ifeq ($(strip $(BUILDMODE)),)
-    exit 1
-endif
-ifeq ($(strip $(PROJECT_PATH)),)
-    exit 1
-endif
-
-PATH_LIB_PAYSAGES = ${PROJECT_PATH}/rendering
-BUILDMODE = debug
-BUILDPATH = ${PROJECT_PATH}/build/${BUILDMODE}
-HEADERS = $(${PATH_LIB_PAYSAGES}/atmosphere/*.h ${PATH_LIB_PAYSAGES}/clouds/*.h ${PATH_LIB_PAYSAGES}/terrain/*.h ${PATH_LIB_PAYSAGES}/textures/*.h ${PATH_LIB_PAYSAGES}/water/*.h ${PATH_LIB_PAYSAGES}/tools/*.h ${PATH_LIB_PAYSAGES}/shared/*.h)
diff --git a/src/controlling/controlling.pro b/src/controlling/controlling.pro
index 275a91f..672bc41 100644
--- a/src/controlling/controlling.pro
+++ b/src/controlling/controlling.pro
@@ -1,23 +1,14 @@
+include(../common.pri)
+
 TEMPLATE = app
 CONFIG += console
 CONFIG -= app_bundle
 CONFIG -= qt
 
 TARGET = paysages-cli
-INCLUDEPATH += ..
-
-CONFIG(debug) {
-    DESTDIR = ../../build/debug/
-    MAKEFILE = Makefile.debug
-} else {
-    DESTDIR = ../../build/release/
-    MAKEFILE = Makefile.release
-}
 
 OBJECTS_DIR = $$DESTDIR/controlling/
 
-release:DEFINES += NDEBUG
-
 DEPENDPATH += ..
 linux-clang:LIBS += -L$$DESTDIR -lpaysages_rendering
 
diff --git a/src/editing/editing.pro b/src/editing/editing.pro
index f5f334f..fdc4810 100644
--- a/src/editing/editing.pro
+++ b/src/editing/editing.pro
@@ -1,24 +1,15 @@
+include(../common.pri)
+
 TEMPLATE = app
 CONFIG += qt
 
 QT += core gui opengl
 
 TARGET = paysages-gui
-INCLUDEPATH += ..
-
-CONFIG(debug) {
-    DESTDIR = ../../build/debug/
-    MAKEFILE = Makefile.debug
-} else {
-    DESTDIR = ../../build/release/
-    MAKEFILE = Makefile.release
-}
 
 OBJECTS_DIR = $$DESTDIR/editing/
 MOC_DIR = $$OBJECTS_DIR/moc/
 
-release:DEFINES += NDEBUG
-
 DEPENDPATH += ..
 linux-clang:LIBS += -L$$DESTDIR -lpaysages_rendering -lpaysages_exploring -lGLU
 win32:LIBS += ../../libpaysages.a -lDevIL -lILU -lILUT -lglib-2.0 -lgthread-2.0
diff --git a/src/exploring/exploring.pro b/src/exploring/exploring.pro
index 88cf1aa..b161513 100644
--- a/src/exploring/exploring.pro
+++ b/src/exploring/exploring.pro
@@ -1,23 +1,14 @@
+include(../common.pri)
+
 TEMPLATE = lib
 CONFIG += console
 CONFIG -= app_bundle
 CONFIG -= qt
 
 TARGET = paysages_exploring
-INCLUDEPATH += ..
-
-CONFIG(debug) {
-    DESTDIR = ../../build/debug/
-    MAKEFILE = Makefile.debug
-} else {
-    DESTDIR = ../../build/release/
-    MAKEFILE = Makefile.release
-}
 
 OBJECTS_DIR = $$DESTDIR/exploring/
 
-release:DEFINES += NDEBUG
-
 SOURCES += main.c \
     terrain.c \
     sky.c \
diff --git a/src/rendering/rendering.pro b/src/rendering/rendering.pro
index 9e82c03..3b43e57 100644
--- a/src/rendering/rendering.pro
+++ b/src/rendering/rendering.pro
@@ -1,23 +1,14 @@
+include(../common.pri)
+
 TEMPLATE = lib
 CONFIG += console
 CONFIG -= app_bundle
 CONFIG -= qt
 
 TARGET = paysages_rendering
-INCLUDEPATH += ..
-
-CONFIG(debug) {
-    DESTDIR = ../../build/debug/
-    MAKEFILE = Makefile.debug
-} else {
-    DESTDIR = ../../build/release/
-    MAKEFILE = Makefile.release
-}
 
 OBJECTS_DIR = $$DESTDIR/rendering/
 
-release:DEFINES += NDEBUG
-
 linux-clang {
     CONFIG += link_pkgconfig
     PKGCONFIG += glib-2.0 gthread-2.0 IL ILU
diff --git a/src/testing/testing.pro b/src/testing/testing.pro
index 586e53e..8b51998 100644
--- a/src/testing/testing.pro
+++ b/src/testing/testing.pro
@@ -1,23 +1,14 @@
+include(../common.pri)
+
 TEMPLATE = app
 CONFIG += console
 CONFIG -= app_bundle
 CONFIG -= qt
 
 TARGET = paysages-tests
-INCLUDEPATH += ..
-
-CONFIG(debug) {
-    DESTDIR = ../../build/debug/
-    MAKEFILE = Makefile.debug
-} else {
-    DESTDIR = ../../build/release/
-    MAKEFILE = Makefile.release
-}
 
 OBJECTS_DIR = $$DESTDIR/testing/
 
-release:DEFINES += NDEBUG
-
 linux-clang {
     CONFIG += link_pkgconfig
     PKGCONFIG += check