Raise errors if cmake fails to run

[r9y9]

pyopenjtalk/setup.py

Lines 141 to 151 in 83bf05c

	# generate config.h for mecab
	# NOTE: need to run cmake to generate config.h
	# we could do it on python side but it would be very tricky,
	# so far let's use cmake tool
	if not exists(join(src_top, "mecab", "src", "config.h")):
	cwd = os.getcwd()
	build_dir = join(src_top, "build")
	os.makedirs(build_dir, exist_ok=True)
	os.chdir(build_dir)
	run(["cmake", ".."])
	os.chdir(cwd)