Hi,
I'm using Windows and I am following this tutorial.
I am at the point where I need to write make at the example project.
I get this error

as warned in the tutorial. However, I have checked the path in Makefile.windows:
ifeq ($(findstring 86, $(ProgramFiles)), )
PROGFILES := C:/Program Files
else
PROGFILES := C:/Program Files (x86)
endif
GNU_INSTALL_ROOT := $(PROGFILES)/GNU Tools ARM Embedded/5.4 2016q3
GNU_VERSION := 5.4.3
GNU_PREFIX := arm-none-eabi
The actual path is \Program Files (x86)\GNU Tools ARM Embedded\5.4 2016q3. I have also added its bin directory to the Path.