from systemfuncs import systemFunctions

from outpututils import rewriteIfChanged

import sys

def iterSystemFuncsHeader(functionResults):

	yield '// Automatically generated by build system.'

	for makeName in sorted(

		func.getMakeName() for func in systemFunctions

		):

		yield '#define HAVE_%s %d' % (makeName, functionResults[makeName])

def getSystemFuncsInfo():

	return dict.fromkeys(

		(func.getMakeName() for func in systemFunctions),

		False

		)

if __name__ == '__main__':

	if len(sys.argv) == 2:

		rewriteIfChanged(

			sys.argv[1],

			iterSystemFuncsHeader(getSystemFuncsInfo())

			)

	else:

		print('Usage: python3 systemfuncs2code.py CONFIG_HEADER ', file=sys.stderr)

		print(

			'Note: Should only be called directly on systems '

			'where the probe does not work.',

			file=sys.stderr

			)

		sys.exit(2)