Ensure "make" works out of the box as per the user guide
Created by: jeremybennett
The user manual says you can just use "make" to build the system,
but in fact you need to set several environment variables. This
patch attempts to put sensible defaults in place, which the user
can chose to override. These values should be suitable on modern
64-bit Intel/AMD Linux distributions.
Files changed:
* Makefile: Provide default values for FORCE_CC, FORCE_PYTHON_VER,
PYTHON_INC and PYTHON_LIB.
* README.md: Update to note that default values are set for
FORCE_CC, FORCE_PYTHON_VER, PYTHON_INC and PYTHON_LIB.
Signed-off-by: Jeremy Bennett jeremy.bennett@embecosm.com