diff --git a/.gitignore b/.gitignore
index dd09683..f5c368e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,5 @@
 rotated*.ppm
 rotated*.pnm
 *.png
+
+Makefile.rules
diff --git a/Makefile b/Makefile
index 3e0841d..686ad81 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,8 @@
-CXX       = clang++
-CXXFLAGS  = -std=c++11 -W -Wall -O3 -ffast-math -g -Werror
-LFLAGS    = -flto
-DEFINES   = -DSIMD
+include Makefile.rules
+
+CXXFLAGS  = -std=c++11 -W -Wall -O3 -ffast-math -g $(CXXFLAGS_PLAFORM)
+LFLAGS    = #-flto
+DEFINES   = #-DSIMD
 BUILD_DIR = /tmp
 SRC       = rotation.cpp \
 	    image.cpp \
diff --git a/configure b/configure
new file mode 100755
index 0000000..0b702c7
--- /dev/null
+++ b/configure
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+case `uname -s` in
+
+  Darwin)
+    echo 'CXX = clang++' > Makefile.rules
+    echo 'CXXFLAGS_PLATFORM = ' > Makefile.rules
+    ;;
+
+  Linux)
+    echo 'CXX = g++' > Makefile.rules
+    echo 'CXXFLAGS_PLATFORM = ' > Makefile.rules
+    ;;
+
+esac