makefile for boost crossplatform - c++

Question

I have created a makefile for a library I am compiling.
I have already got the makefile working on windows and linux , but there is a different makefile for each OS.
How could I allow this to work on both OS without hardcoding the path to the boost library and boost headers below:
Do I need to add the boost folder to the path variable? do I need to add the library directory to some OS variable?
makefile windows:
# source files.
SRC = protoService.cpp protocolBaseServer.cpp client.cpp
OBJ = $(SRC:.cpp=.o)
OUT = ../libutils.a
# include directories
INCLUDES = -I. -I../include/ -IC:\boost_1_59_0\
# C++ compiler flags (-g -O2 -Wall)
CCFLAGS = -g -MD -MP -std=c++0x -Wall -c
# compiler
CCC = g++
# library paths
LIBS = -LC:\boost_1_59_0\libs -lboost_serialization
# compile flags
LDFLAGS = -g
.SUFFIXES: .cpp
default: $(OUT)
.cpp.o:
$(CCC) $(INCLUDES) $(CCFLAGS) $< -o $#
$(OUT): $(OBJ)
ar rcs $(OUT) $(OBJ)
#depend: dep
#dep:
# makedepend -- $(CFLAGS) -- $(INCLUDES) $(SRC)
clean:
rm -f $(OBJ) $(OUT) Makefile.bak
-include $(DEPS:%.o=%.d)
makefile linux:
# source files.
SRC = protoService.cpp protocolBaseServer.cpp client.cpp
OBJ = $(SRC:.cpp=.o)
OUT = ../libutils.a
# include directories
INCLUDES = -I. -I../include/ -I/usr/local/include -I/usr/share/boost_1_58_0/
# C++ compiler flags (-g -O2 -Wall)
CCFLAGS = -g -MD -MP -std=c++0x -Wall -c
# compiler
CCC = g++
# library paths
LIBS = -L/usr/share/boost_1_58_0/lib/ -lboost_serialization
# compile flags
LDFLAGS = -g
.SUFFIXES: .cpp
default: $(OUT)
.cpp.o:
$(CCC) $(INCLUDES) $(CCFLAGS) $< -o $#
$(OUT): $(OBJ)
ar rcs $(OUT) $(OBJ)
#depend: dep
#dep:
# makedepend -- $(CFLAGS) -- $(INCLUDES) $(SRC)
clean:
rm -f $(OBJ) $(OUT) Makefile.bak
-include $(DEPS:%.o=%.d)

Answer 1

Make passes environment variables to the makefile processor, so you can create make variables based on them.
INC_PATHS := ../include/ .
LIBS += boost_serialization
ifeq ($(OS),"Windows_NT")
INC_PATHS += ../include/ C:/boost_1_59_0/libs
LIBS += boost_serialization
else
INC_PATHS += /usr/local/include /usr/share/boost_1_58_0/lib/
endif
And then
INCLUDES = $(prepend -I,$(INC_PATHS))
or something like that. I'm not in front of make to ensure the syntax is exactly correct, but it should get you moving in the right direction.