diff -Nur core-2.1.1.orig/ext/Makefile core-2.1.1/ext/Makefile
--- core-2.1.1.orig/ext/Makefile	2011-08-06 22:53:29.000000000 +0100
+++ core-2.1.1/ext/Makefile	2011-08-07 00:40:58.000000000 +0100
@@ -38,16 +38,18 @@
   endif
 endif
 
-INCLUDE=-I${CORE_PATH}/inc -I${CORE_PATH}/gmp/include \
-	-I${CORE_PATH}/mpfr/include
+INCLUDE=-I${CORE_PATH}/inc
 
 
 COREX_LIB_LEVEL3=${CORE_PATH}/lib/libcorex++$(VAR)_level3.a
 COREX_LIB_LEVEL2=${CORE_PATH}/lib/libcorex++$(VAR)_level2.a
 COREX_LIB_LEVEL1=${CORE_PATH}/lib/libcorex++$(VAR)_level1.a
-COREX_SHARED_LIB_LEVEL3=${CORE_PATH}/lib/libcorex++$(VAR)_level3.${CORE_DYLIB_EXTENSION}
-COREX_SHARED_LIB_LEVEL2=${CORE_PATH}/lib/libcorex++$(VAR)_level2.${CORE_DYLIB_EXTENSION}
-COREX_SHARED_LIB_LEVEL1=${CORE_PATH}/lib/libcorex++$(VAR)_level1.${CORE_DYLIB_EXTENSION}
+COREX_SHARED_LIB_LEVEL3_NAME=libcorex++$(VAR)_level3.${CORE_DYLIB_EXTENSION}.2
+COREX_SHARED_LIB_LEVEL2_NAME=libcorex++$(VAR)_level2.${CORE_DYLIB_EXTENSION}.2
+COREX_SHARED_LIB_LEVEL1_NAME=libcorex++$(VAR)_level1.${CORE_DYLIB_EXTENSION}.2
+COREX_SHARED_LIB_LEVEL3=${CORE_PATH}/lib/$(COREX_SHARED_LIB_LEVEL3_NAME)
+COREX_SHARED_LIB_LEVEL2=${CORE_PATH}/lib/$(COREX_SHARED_LIB_LEVEL2_NAME)
+COREX_SHARED_LIB_LEVEL1=${CORE_PATH}/lib/$(COREX_SHARED_LIB_LEVEL1_NAME)
 
 TARGET=${COREX_LIB_LEVEL3} ${COREX_LIB_LEVEL2} ${COREX_LIB_LEVEL1}
 
@@ -74,11 +76,11 @@
 	-@rm -rf $@ 
 	$(AR) $@ $?
 
-COREX_SHARED_DEPS=-L${GMP_PREFIX}/lib -lgmp -L${MPFR_PREFIX}/lib -lmpfr -L${CORE_PATH}/lib -lcore++${VAR}
+COREX_SHARED_DEPS= -lgmp -lmpfr -L${CORE_PATH}/lib -lcore++${VAR}
 
 ${COREX_SHARED_LIB_LEVEL3}: ${L3_OBJS}
 	-@rm -rf $@ 
-	$(CXX) $(COREX_SHARED_DEPS) $(CORE_LDFLAGS) -o $@ $?
+	$(CXX) $(LDFLAGS) $(COREX_SHARED_DEPS) $(CORE_LDFLAGS)  -Wl,-soname,$(COREX_SHARED_LIB_LEVEL3_NAME) -o $@ $?
 
 ${COREX_LIB_LEVEL2}: ${L2_OBJS}
 	-@rm -rf $@ 
@@ -86,7 +88,7 @@
 
 ${COREX_SHARED_LIB_LEVEL2}: ${L2_OBJS}
 	-@rm -rf $@ 
-	$(CXX) $(COREX_SHARED_DEPS) $(CORE_LDFLAGS) -o $@ $?
+	$(CXX) $(LDFLAGS) $(COREX_SHARED_DEPS) $(CORE_LDFLAGS) -Wl,-soname,$(COREX_SHARED_LIB_LEVEL2_NAME) -o $@ $?
 
 ${COREX_LIB_LEVEL1}: ${L1_OBJS}
 	-@rm -rf $@ 
@@ -94,7 +96,7 @@
 
 ${COREX_SHARED_LIB_LEVEL1}: ${L1_OBJS}
 	-@rm -rf $@ 
-	$(CXX) $(COREX_SHARED_DEPS) $(CORE_LDFLAGS) -o $@ $?
+	$(CXX) $(LDFLAGS) $(COREX_SHARED_DEPS) $(CORE_LDFLAGS)  -Wl,-soname,$(COREX_SHARED_LIB_LEVEL1_NAME) -o $@ $?
 
 %_level3.o:	%.cpp
 	${CXX} $(CORE_CXXFLAGS) -DCORE_LEVEL=3 $(INCLUDE) -c $< -o $@
diff -Nur core-2.1.1.orig/progs/Make.options core-2.1.1/progs/Make.options
--- core-2.1.1.orig/progs/Make.options	2011-08-06 22:53:29.000000000 +0100
+++ core-2.1.1/progs/Make.options	2011-08-06 23:31:01.000000000 +0100
@@ -11,10 +11,8 @@
 
 include $(CORE_PATH)/Make.config
 
-CORE_INC=-I. -I$(CORE_PATH)/inc -I$(CORE_PATH)/mpfr/include \
-	 -I$(CORE_PATH)/gmp/include
-CORE_LIB=-L$(CORE_PATH)/lib -L$(CORE_PATH)/mpfr/lib -L$(CORE_PATH)/gmp/lib \
-	 -lcore++$(VAR) -lmpfr -lgmp
+CORE_INC=-I. -I$(CORE_PATH)/inc
+CORE_LIB=-L$(CORE_PATH)/lib -lcore++$(VAR) -lmpfr -lgmp
 
 COREX_LIB_LEVEL=-lcoreex++$(VAR)_level
 
diff -Nur core-2.1.1.orig/src/Makefile core-2.1.1/src/Makefile
--- core-2.1.1.orig/src/Makefile	2011-08-06 22:53:29.000000000 +0100
+++ core-2.1.1/src/Makefile	2011-08-07 00:24:38.000000000 +0100
@@ -23,7 +23,7 @@
   endif
 endif
 
-INCLUDE=-I${CORE_PATH}/inc -I${CORE_PATH}/mpfr/include -I${CORE_PATH}/gmp/include
+INCLUDE=-I${CORE_PATH}/inc
 
 # VAR indicates variants of the Core library
 #	E.g., if VAR=(empty) then we compile the release version.
@@ -44,7 +44,8 @@
 
 # The following library will be built:
 CORE_LIB=$(CORE_PATH)/lib/libcore++${VAR}.a
-CORE_SHARED_LIB=$(CORE_PATH)/lib/libcore++${VAR}.${CORE_DYLIB_EXTENSION}
+CORE_SHARED_LIB_NAME=libcore++${VAR}.${CORE_DYLIB_EXTENSION}.2
+CORE_SHARED_LIB=$(CORE_PATH)/lib/$(CORE_SHARED_LIB_NAME)
 
 TARGET=$(CORE_LIB)
 
@@ -52,7 +53,7 @@
   TARGET+=$(CORE_SHARED_LIB)
 endif
 
-DEPS=-L${GMP_PREFIX}/lib -L${MPFR_PREFIX}/lib -lgmp -lmpfr
+DEPS=-lgmp -lmpfr
 
 # =============================================================
 # RULES  ======================================================
@@ -64,7 +65,7 @@
 	$(AR) $@ $^
 
 ${CORE_SHARED_LIB}:	$(EXPROBJS)
-	$(CXX) $(DEPS) $(CORE_LDFLAGS) -o $@ $^
+	$(CXX) $(LDFLAGS) $(CORE_LDFLAGS) -Wl,-soname,$(CORE_SHARED_LIB_NAME) $(DEPS) -o $@ $^ $(LIBS)
 
 %${VAR}.o:	%.cpp
 	${CXX} $(CORE_CXXFLAGS) $(INCLUDE) -c $< -o $@