diff --git a/.gitignore b/.gitignore
index e3ec39b..717d5bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ benchmark
 example1
 example2
 tags
+config.mk
diff --git a/Makefile b/Makefile
index ada3124..19335ce 100755
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,21 @@
-CC=gcc
-CXX=g++
+BASEPROJ?=.
+
+FILENAME=$(BASEPROJ)/config.mk
+ifeq ("$(wildcard $(FILENAME))",)
+else
+include $(BASEPROJ)/config.mk
+endif
+
+CFG_CC?=gcc-4.9
+CFG_CXX?=g++-4.9
+CFG_NVCC?=nvcc
+
+CFG_NVCC+= -arch=sm_21 -w
+
 CFLAGS=
-NVCC=nvcc -arch=sm_21 -w
 
 CUDA_ROOT=/usr/local/cuda
+CFG_CUDA_LIBPATH?=/usr/local/cuda/lib
 
 EXECUTABLES=
 EXAMPLE_PROGRAM=benchmark example1 example2
@@ -32,7 +44,7 @@ INCLUDE= -I include/\
 	 -I ../math_ext/
 
 LIBRARY= -lcuda -lcublas -lcudart
-LIBRARY_PATH=-L$(CUDA_ROOT)/lib64/
+LIBRARY_PATH=-L$(CFG_CUDA_LIBPATH)
 CUDA_INCLUDE=$(INCLUDE) \
 	     -I $(CUDA_ROOT)/samples/common/inc/ \
 	     -I $(CUDA_ROOT)/include
@@ -40,22 +52,22 @@ CUDA_INCLUDE=$(INCLUDE) \
 CPPFLAGS= -std=c++0x $(CFLAGS) $(INCLUDE)
 
 benchmark: $(OBJ) benchmark.cpp
-	$(CXX) $(CPPFLAGS) $(CUDA_INCLUDE) -o $@ $^ $(LIBRARY_PATH) $(LIBRARY)
+	$(CFG_CXX) $(CPPFLAGS) $(CUDA_INCLUDE) -o $@ $^ $(LIBRARY_PATH) $(LIBRARY)
 example1: $(OBJ) example1.cpp
-	$(CXX) $(CPPFLAGS) $(CUDA_INCLUDE) -o $@ $^ $(LIBRARY_PATH) $(LIBRARY)
+	$(CFG_CXX) $(CPPFLAGS) $(CUDA_INCLUDE) -o $@ $^ $(LIBRARY_PATH) $(LIBRARY)
 example2: $(OBJ) example2.cu
-	$(NVCC) $(NVCCFLAGS) $(CFLAGS) $(CUDA_INCLUDE) -o $@ $^ $(LIBRARY_PATH) $(LIBRARY)
+	$(CFG_NVCC) $(NVCCFLAGS) $(CFLAGS) $(CUDA_INCLUDE) -o $@ $^ $(LIBRARY_PATH) $(LIBRARY)
 # +==============================+
 # +===== Other Phony Target =====+
 # +==============================+
 obj/%.o: %.cpp include/%.h
-	$(CXX) $(CPPFLAGS) $(CUDA_INCLUDE) -o $@ -c $<
+	$(CFG_CXX) $(CPPFLAGS) $(CUDA_INCLUDE) -o $@ -c $<
 
 obj/%.o: %.cu
-	$(NVCC) $(NVCCFLAGS) $(CFLAGS) $(CUDA_INCLUDE) -o $@ -c $<
+	$(CFG_NVCC) $(NVCCFLAGS) $(CFLAGS) $(CUDA_INCLUDE) -o $@ -c $<
 
 obj/%.d: %.cpp
-	@$(CXX) -MM $(CPPFLAGS) $< > $@.$$$$; \
+	@$(CFG_CXX) -MM $(CPPFLAGS) $< > $@.$$$$; \
 	sed 's,\($*\)\.o[ :]*,obj/\1.o $@ : ,g' < $@.$$$$ > $@;\
 	rm -f $@.$$$$
 
diff --git a/configure b/configure
new file mode 100755
index 0000000..58b9be0
--- /dev/null
+++ b/configure
@@ -0,0 +1,199 @@
+#!/bin/bash
+
+test_cmd() {
+    "$@"
+    local status=$?
+
+    if [ $status -ne 0 ] 
+    then err "are you using the gnu version?"
+    else msg "test $@ OK"
+    fi
+}
+
+
+msg() {
+    echo "configure: $1"
+}
+
+step_msg() {
+    msg
+    msg "$1"
+    msg
+}
+
+warn() {
+    echo "configure: WARNING: $1"
+}
+
+err() {
+    echo "configure: error: $1"
+    exit 1
+}
+
+need_cmd() {
+    if command -v $1 >/dev/null 2>&1
+    then msg "found $1"
+    else err "need $1"
+    fi
+}
+
+
+probe() {
+    local V=$1
+    shift
+    local P
+    local T
+
+    for P
+    do
+        T=$(command -v $P 2>&1)
+        if [ $? -eq 0 ]
+        then
+            VER0=$($P --version 2>/dev/null | head -1 \
+                |  sed -e 's/[^0-9]*\([vV]\?[0-9.]\+[^ ]*\).*/\1/' )
+            if [ $? -eq 0 -a "x${VER0}" != "x" ]
+            then
+              VER="($VER0)"
+            else
+              VER=""
+            fi
+            break
+        else
+            VER=""
+            T=""
+        fi
+    done
+
+    eval $V=\$T
+    putvar $V "$VER"
+}
+
+probe_need() {
+    local V=$1
+    probe $*
+    eval VV=\$$V
+
+    if [ -z "$VV" ] 
+    then
+        err "needed, but unable to find any of: $*"
+    fi
+}
+
+putvar() {
+    local T
+    eval T=\$$1
+    eval TLEN=\${#$1}
+    if [ $TLEN -gt 35 ]
+    then
+        printf "configure: %-20s := %.35s ...\n" $1 "$T"
+    else
+        printf "configure: %-20s := %s %s\n" $1 "$T" "$2"
+    fi
+    printf "%-20s := %s\n" $1 "$T" >>config.tmp
+}
+
+move_if_changed() {
+    if cmp -s $1 $2
+    then
+        msg "leaving $2 unchanged"
+    else
+        msg "mv $1 $2"
+        mv -f $1 $2
+        chmod u-w $2 # make moved artifact read-only
+    fi
+}
+
+copy_if_changed() {
+    if cmp -s $1 $2
+    then
+        msg "leaving $2 unchanged"
+    else
+        msg "cp $1 $2"
+        cp -f $1 $2
+        chmod u-w $2 # make copied artifact read-only
+    fi
+}
+
+
+CFG_OSTYPE=$(uname -s)
+CFG_CPUTYPE=$(uname -m)
+
+
+case $CFG_OSTYPE in
+    Linux)
+        CFG_OSTYPE=unknown-linux-gnu
+        ;;
+    Darwin)
+        CFG_OSTYPE=apple-darwin
+        ;;
+    MSYS*)
+        CFG_OSTYPE=pc-windows-gnu
+        ;;
+    *)
+        err "unknown OS type: $CFG_OSTYPE"
+        ;;
+esac
+
+
+if [ $CFG_OSTYPE = apple-darwin -a $CFG_CPUTYPE = i386 ]
+then
+    if sysctl hw.optional.x86_64 | grep -q ': 1'
+    then
+        CFG_CPUTYPE=x86_64
+    fi
+fi
+
+
+msg "looking for required commands"
+need_cmd mkdir
+need_cmd printf
+
+step_msg "looking for needed program"
+
+probe_need CFG_NVCC nvcc
+probe_need CFG_MAKE make
+probe_need CFG_CTAGS ctags
+
+
+if [ $CFG_OSTYPE = apple-darwin ]
+then
+    CFG_OSX_GCC_VERSION=$(g++ --version 2>&1 | grep "Apple LLVM version")
+
+    if [ $? -eq 0 ]
+    then
+        step_msg "on OS X 10.9, g++ is an alias of clang. Which is not good since CUDA is only compatible with g++, trying to probe other path instead"
+
+        #probe for homebrew installed g++-4.9
+        probe_need CFG_CC gcc-4.9
+        probe_need CFG_CXX g++-4.9
+
+    else
+        if [ $(g++ --version 2>&1 | grep -c ' 4\.[0-6]') -ne 0 ]; then
+            err "older g++ found, please install a newer version of gcc"
+        fi
+
+        probe_need CFG_CC gcc
+        probe_need CFG_CXX g++
+    fi
+    
+    CFG_CUDA_LIBPATH=/usr/local/cuda/lib
+    putvar CFG_CUDA_LIBPATH
+
+elif [ $CFG_OSTYPE = unknown-linux-gnu ]
+then
+    probe_need CFG_CC gcc
+    probe_need CFG_CXX g++
+
+    CFG_CUDA_LIBPATH=/usr/local/cuda/lib64
+    putvar CFG_CUDA_LIBPATH
+fi
+
+
+msg "testing ctags is gnu"
+test_cmd ctags -R
+
+move_if_changed config.tmp config.mk
+rm -f config.tmp
+
+msg libcumatrix "configuration complete"
+step_msg "please type 'make' to build the library"