+UNAME := $(shell uname)
+ifeq ($(UNAME),Darwin)
+CPPFLAGS += -DHAVE_FUNOPEN
+# libpng from system x11, libvncserver from macports
+CPPFLAGS += -I/usr/X11/include -I/opt/local/include
+LDFLAGS += -L/usr/X11/lib -L/opt/local/lib
+endif
+ifeq ($(UNAME),Linux)
+# linux needs _GNU_SOURCE for fopencookie
+# linux needs _XOPEN_SOURCE=600 (provided by _GNU_SOURCE) for getopt and strdup
+CPPFLAGS += -DHAVE_FOPENCOOKIE -D_GNU_SOURCE
+# linux needs librt for clock_gettime
+LDFLAGS += -lrt
+endif
+
+CPPFLAGS += -DHAVE_LIBVNCSERVER -DHAVE_LIBPNG
+LDFLAGS += -lvncserver -lpng -lreadline