diff --git a/makefiles/Makefile.cpp.mk b/makefiles/Makefile.cpp.mk
index c2b6e799fa..7b53710c80 100644
--- a/makefiles/Makefile.cpp.mk
+++ b/makefiles/Makefile.cpp.mk
@@ -441,11 +441,11 @@ $(OBJ_DIR)/visitor.$O:$(SRC_DIR)/constraint_solver/visitor.cc
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)/constraint_solver/visitor.cc $(OBJ_OUT)visitor.$O
 
 $(LIB_DIR)/$(LIBPREFIX)constraint_solver.$(DYNAMIC_LIB_SUFFIX): $(CONSTRAINT_SOLVER_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)constraint_solver.$(DYNAMIC_LIB_SUFFIX) $(CONSTRAINT_SOLVER_LIB_OBJS)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)constraint_solver.$(DYNAMIC_LIB_SUFFIX) $(CONSTRAINT_SOLVER_LIB_OBJS)
 
 ifneq ($(SYSTEM),win)
 $(LIB_DIR)/$(LIBPREFIX)constraint_solver.$(STATIC_LIB_SUFFIX): $(CONSTRAINT_SOLVER_LIB_OBJS)
-	$(STATIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)constraint_solver.$(STATIC_LIB_SUFFIX) $(CONSTRAINT_SOLVER_LIB_OBJS)
+	$(STATIC_LINK_CMD) $(STATIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)constraint_solver.$(STATIC_LIB_SUFFIX) $(CONSTRAINT_SOLVER_LIB_OBJS)
 endif
 
 # Linear Solver Library
@@ -487,11 +487,11 @@ $(OBJ_DIR)/sulum_interface.$O:$(SRC_DIR)/linear_solver/sulum_interface.cc
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)/linear_solver/sulum_interface.cc $(OBJ_OUT)sulum_interface.$O
 
 $(LIB_DIR)/$(LIBPREFIX)linear_solver.$(DYNAMIC_LIB_SUFFIX): $(LINEAR_SOLVER_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)linear_solver.$(DYNAMIC_LIB_SUFFIX) $(LINEAR_SOLVER_LIB_OBJS) $(STATIC_SCIP_LNK)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)linear_solver.$(DYNAMIC_LIB_SUFFIX) $(LINEAR_SOLVER_LIB_OBJS) $(STATIC_SCIP_LNK)
 
 ifneq ($(SYSTEM),win)
 $(LIB_DIR)/$(LIBPREFIX)linear_solver.$(STATIC_LIB_SUFFIX): $(LINEAR_SOLVER_LIB_OBJS)
-	$(STATIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)linear_solver.$(STATIC_LIB_SUFFIX) $(LINEAR_SOLVER_LIB_OBJS)
+	$(STATIC_LINK_CMD) $(STATIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)linear_solver.$(STATIC_LIB_SUFFIX) $(LINEAR_SOLVER_LIB_OBJS)
 endif
 
 # Util library.
@@ -519,11 +519,11 @@ $(OBJ_DIR)/xml_helper.$O:$(SRC_DIR)/util/xml_helper.cc
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)/util/xml_helper.cc $(OBJ_OUT)xml_helper.$O
 
 $(LIB_DIR)/$(LIBPREFIX)util.$(DYNAMIC_LIB_SUFFIX): $(UTIL_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)util.$(DYNAMIC_LIB_SUFFIX) $(UTIL_LIB_OBJS)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)util.$(DYNAMIC_LIB_SUFFIX) $(UTIL_LIB_OBJS)
 
 ifneq ($(SYSTEM),win)
 $(LIB_DIR)/$(LIBPREFIX)util.$(STATIC_LIB_SUFFIX): $(UTIL_LIB_OBJS)
-	$(STATIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)util.$(STATIC_LIB_SUFFIX) $(UTIL_LIB_OBJS)
+	$(STATIC_LINK_CMD) $(STATIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)util.$(STATIC_LIB_SUFFIX) $(UTIL_LIB_OBJS)
 endif
 
 # Graph library.
@@ -551,11 +551,11 @@ $(OBJ_DIR)/min_cost_flow.$O:$(SRC_DIR)/graph/min_cost_flow.cc
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)/graph/min_cost_flow.cc $(OBJ_OUT)min_cost_flow.$O
 
 $(LIB_DIR)/$(LIBPREFIX)graph.$(DYNAMIC_LIB_SUFFIX): $(GRAPH_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)graph.$(DYNAMIC_LIB_SUFFIX) $(GRAPH_LIB_OBJS)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)graph.$(DYNAMIC_LIB_SUFFIX) $(GRAPH_LIB_OBJS)
 
 ifneq ($(SYSTEM),win)
 $(LIB_DIR)/$(LIBPREFIX)graph.$(STATIC_LIB_SUFFIX): $(GRAPH_LIB_OBJS)
-	$(STATIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)graph.$(STATIC_LIB_SUFFIX) $(GRAPH_LIB_OBJS)
+	$(STATIC_LINK_CMD) $(STATIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)graph.$(STATIC_LIB_SUFFIX) $(GRAPH_LIB_OBJS)
 endif
 
 # Shortestpaths library.
@@ -575,11 +575,11 @@ $(OBJ_DIR)/shortestpaths.$O:$(SRC_DIR)/graph/shortestpaths.cc
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)/graph/shortestpaths.cc $(OBJ_OUT)shortestpaths.$O
 
 $(LIB_DIR)/$(LIBPREFIX)shortestpaths.$(DYNAMIC_LIB_SUFFIX): $(SHORTESTPATHS_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)shortestpaths.$(DYNAMIC_LIB_SUFFIX) $(SHORTESTPATHS_LIB_OBJS)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)shortestpaths.$(DYNAMIC_LIB_SUFFIX) $(SHORTESTPATHS_LIB_OBJS)
 
 ifneq ($(SYSTEM),win)
 $(LIB_DIR)/$(LIBPREFIX)shortestpaths.$(STATIC_LIB_SUFFIX): $(SHORTESTPATHS_LIB_OBJS)
-	$(STATIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)shortestpaths.$(STATIC_LIB_SUFFIX) $(SHORTESTPATHS_LIB_OBJS)
+	$(STATIC_LINK_CMD) $(STATIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)shortestpaths.$(STATIC_LIB_SUFFIX) $(SHORTESTPATHS_LIB_OBJS)
 endif
 
 # Routing library.
@@ -591,11 +591,11 @@ $(OBJ_DIR)/routing.$O:$(SRC_DIR)/constraint_solver/routing.cc
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)/constraint_solver/routing.cc $(OBJ_OUT)routing.$O
 
 $(LIB_DIR)/$(LIBPREFIX)routing.$(DYNAMIC_LIB_SUFFIX): $(ROUTING_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)routing.$(DYNAMIC_LIB_SUFFIX) $(ROUTING_LIB_OBJS)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)routing.$(DYNAMIC_LIB_SUFFIX) $(ROUTING_LIB_OBJS)
 
 ifneq ($(SYSTEM),win)
 $(LIB_DIR)/$(LIBPREFIX)routing.$(STATIC_LIB_SUFFIX): $(ROUTING_LIB_OBJS)
-	$(STATIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)routing.$(STATIC_LIB_SUFFIX) $(ROUTING_LIB_OBJS)
+	$(STATIC_LINK_CMD) $(STATIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)routing.$(STATIC_LIB_SUFFIX) $(ROUTING_LIB_OBJS)
 endif
 
 # Algorithms library.
@@ -611,11 +611,11 @@ $(OBJ_DIR)/knapsack_solver.$O:$(SRC_DIR)/algorithms/knapsack_solver.cc $(GEN_DIR
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)/algorithms/knapsack_solver.cc $(OBJ_OUT)knapsack_solver.$O
 
 $(LIB_DIR)/$(LIBPREFIX)algorithms.$(DYNAMIC_LIB_SUFFIX): $(ALGORITHMS_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)algorithms.$(DYNAMIC_LIB_SUFFIX) $(ALGORITHMS_LIB_OBJS)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)algorithms.$(DYNAMIC_LIB_SUFFIX) $(ALGORITHMS_LIB_OBJS)
 
 ifneq ($(SYSTEM),win)
 $(LIB_DIR)/$(LIBPREFIX)algorithms.$(STATIC_LIB_SUFFIX): $(ALGORITHMS_LIB_OBJS)
-	$(STATIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)algorithms.$(STATIC_LIB_SUFFIX) $(ALGORITHMS_LIB_OBJS)
+	$(STATIC_LINK_CMD) $(STATIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)algorithms.$(STATIC_LIB_SUFFIX) $(ALGORITHMS_LIB_OBJS)
 endif
 
 # Base library.
@@ -669,10 +669,10 @@ $(OBJ_DIR)/timer.$O:$(SRC_DIR)/base/timer.cc
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)/base/timer.cc $(OBJ_OUT)timer.$O
 
 $(LIB_DIR)/$(LIBPREFIX)base.$(DYNAMIC_LIB_SUFFIX): $(BASE_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)base.$(DYNAMIC_LIB_SUFFIX) $(BASE_LIB_OBJS)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)base.$(DYNAMIC_LIB_SUFFIX) $(BASE_LIB_OBJS)
 
 $(LIB_DIR)/$(LIBPREFIX)base.$(STATIC_LIB_SUFFIX): $(BASE_LIB_OBJS)
-	$(STATIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)base.$(STATIC_LIB_SUFFIX) $(BASE_LIB_OBJS)
+	$(STATIC_LINK_CMD) $(STATIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)base.$(STATIC_LIB_SUFFIX) $(BASE_LIB_OBJS)
 
 # DIMACS challenge problem format library
 
@@ -686,7 +686,7 @@ $(OBJ_DIR)/print_dimacs_assignment.$O:$(EX_DIR)/cpp/print_dimacs_assignment.cc
 	$(CCC) $(CFLAGS) -c $(EX_DIR)$Scpp/print_dimacs_assignment.cc $(OBJ_OUT)print_dimacs_assignment.$O
 
 $(LIB_DIR)/$(LIBPREFIX)dimacs.$(DYNAMIC_LIB_SUFFIX): $(DIMACS_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)dimacs.$(DYNAMIC_LIB_SUFFIX) $(DIMACS_LIB_OBJS)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)dimacs.$(DYNAMIC_LIB_SUFFIX) $(DIMACS_LIB_OBJS)
 
 FLATZINC_LIB_OBJS=\
 	$(OBJ_DIR)/flatzinc.$O\
@@ -740,10 +740,10 @@ $(OBJ_DIR)/registry.$O:$(SRC_DIR)/flatzinc/registry.cc $(SRC_DIR)/flatzinc/flatz
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)$Sflatzinc$Sregistry.cc $(OBJ_OUT)registry.$O
 
 $(LIB_DIR)/$(LIBPREFIX)fz.$(DYNAMIC_LIB_SUFFIX): $(FLATZINC_LIB_OBJS)
-	$(DYNAMIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)fz.$(DYNAMIC_LIB_SUFFIX) $(FLATZINC_LIB_OBJS)
+	$(DYNAMIC_LINK_CMD) $(DYNAMIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)fz.$(DYNAMIC_LIB_SUFFIX) $(FLATZINC_LIB_OBJS)
 
 $(LIB_DIR)/$(LIBPREFIX)fz.$(STATIC_LIB_SUFFIX): $(FLATZINC_LIB_OBJS)
-	$(STATIC_LINK_CMD) $(LINKPREFIX)$(LIB_DIR)$S$(LIBPREFIX)fz.$(STATIC_LIB_SUFFIX) $(FLATZINC_LIB_OBJS)
+	$(STATIC_LINK_CMD) $(STATIC_LINK_PREFIX)$(LIB_DIR)$S$(LIBPREFIX)fz.$(STATIC_LIB_SUFFIX) $(FLATZINC_LIB_OBJS)
 
 $(OBJ_DIR)/fz.$O:$(SRC_DIR)/flatzinc/fz.cc $(SRC_DIR)/flatzinc/flatzinc.h $(SRC_DIR)/flatzinc/parser.h
 	$(CCC) $(CFLAGS) -c $(SRC_DIR)$Sflatzinc$Sfz.cc $(OBJ_OUT)fz.$O
diff --git a/makefiles/Makefile.unix b/makefiles/Makefile.unix
index 6fa373b4dc..ad3fbb0c85 100644
--- a/makefiles/Makefile.unix
+++ b/makefiles/Makefile.unix
@@ -162,10 +162,11 @@ ifeq ($(PLATFORM),LINUX)
   DYNAMIC_LIB_SUFFIX = so
   DYNAMIC_SWIG_LIB_SUFFIX = so
   DYNAMIC_LINK_CMD = g++ -shared
+  DYNAMIC_LINK_PREFIX = -o # Need the space.
   LINKPREFIX = -o # Need the space.
   STATIC_LIB_SUFFIX = a
   STATIC_LINK_CMD = ar rv
-  LINKPREFIX = -o # Need the space.
+  STATIC_LINK_PREFIX =
   DYNAMIC_PRE_LIB = -Wl,-rpath $(OR_ROOT_FULL)/lib -L$(OR_ROOT_FULL)/lib -l
   DYNAMIC_POST_LIB =
   STATIC_PRE_LIB = $(OR_ROOT_FULL)/lib/lib
@@ -182,9 +183,11 @@ ifeq ($(PLATFORM),MACOSX)
     MONO = DYLD_LIBRARY_PATH=$(LIB_DIR):$(DYLD_LIBRARY_PATH) $(UNIX_MONO_DIR)/bin/mono
   endif
 
-  GFLAGS_LNK = -L$(UNIX_GFLAGS_DIR)/lib -lgflags
+  DYNAMIC_GFLAGS_LNK = -L$(UNIX_GFLAGS_DIR)/lib -lgflags
+  STATIC_GFLAGS_LNK = $(UNIX_GFLAGS_DIR)/lib/libgflags.a
   ZLIB_LNK = -lz
-  PROTOBUF_LNK = -L$(UNIX_PROTOBUF_DIR)/lib -lprotobuf
+  DYNAMIC_PROTOBUF_LNK = -L$(UNIX_PROTOBUF_DIR)/lib -lprotobuf
+  STATIC_PROTOBUF_LNK = $(UNIX_PROTOBUF_DIR)/lib/libprotobuf.a
   ARCH = -DARCH_K8
   SYS_LNK =
 
@@ -200,9 +203,10 @@ ifeq ($(PLATFORM),MACOSX)
   DYNAMIC_LIB_SUFFIX = dylib
   DYNAMIC_SWIG_LIB_SUFFIX = so # To overcome a bug in Mac OS X loader.
   DYNAMIC_LINK_CMD = ld -arch x86_64 -dylib -flat_namespace -undefined suppress -macosx_version_min 10.6 -lSystem -compatibility_version 1.0 -current_version $(OR_TOOLS_VERSION)
+  DYNAMIC_LINK_PREFIX = -o # Space needed.
   STATIC_LIB_SUFFIX = a
-  STATIC_LINK_CMD = ar rv
-  LINKPREFIX = -o # Need the space.
+  STATIC_LINK_CMD = ar -r -v
+  STATIC_LINK_PREFIX =
 
   ifdef UNIX_GLPK_DIR
     DYNAMIC_GLPK_LNK = -L$(UNIX_GLPK_DIR)/lib -lglpk
diff --git a/makefiles/Makefile.win b/makefiles/Makefile.win
index ef7ca4b2b2..a061e28424 100644
--- a/makefiles/Makefile.win
+++ b/makefiles/Makefile.win
@@ -11,8 +11,9 @@ SRC_DIR = $(OR_ROOT)src
 EX_DIR  = $(OR_ROOT)examples
 INC_DIR = $(OR_ROOT)src
 DYNAMIC_LINK_CMD = lib
+DYNAMIC_LINK_PREFIX = /OUT:
 STATIC_LINK_CMD = lib
-LINKPREFIX = /OUT:
+STATIC_LINK_PREFIX = /OUT:
 DYNAMIC_PRE_LIB = $(OR_ROOT)lib\\
 DYNAMIC_POST_LIB = .lib
 STATIC_PRE_LIB = $(OR_ROOT)lib\\