pm:cpupower: Add error warning when SWIG is not installed

# This Makefile expects you have already run the makefile for cpupower to build

# the .o files in the lib directory for the bindings to be created.

CC=gcc

LIB_DIR = ../../lib

BIND_DIR = .

PY_INCLUDE := $(firstword $(shell python-config --includes))

#PY_INCLUDE = $(shell python-config --includes | awk '{ print $1 }')

CC := gcc

HAVE_SWIG := $(shell if which swig >/dev/null 2>&1; then echo 1; else echo 0; fi)

HAVE_PYCONFIG := $(shell if which python-config >/dev/null 2>&1; then echo 1; else echo 0; fi)

LIB_DIR := ../../lib

PY_INCLUDE = $(firstword $(shell python-config --includes))

OBJECTS_LIB = $(wildcard $(LIB_DIR)/*.o)

OBJECTS_BIND = $(wildcard $(BIND_DIR)/*.o)

all: _raw_pylibcpupower.so

_raw_pylibcpupower.so: raw_pylibcpupower_wrap.o

	$(CC) -shared $(OBJECTS_LIB) raw_pylibcpupower_wrap.o -o _raw_pylibcpupower.so # raw_pylibcpupower_wrap.o

#	$(CC) -shared $(OBJECTS_BIND) $(OBJECTS_LIB) -o _raw_pylibcpupower.so # raw_pylibcpupower_wrap.o

	$(CC) -shared $(OBJECTS_LIB) raw_pylibcpupower_wrap.o -o _raw_pylibcpupower.so

raw_pylibcpupower_wrap.o: raw_pylibcpupower_wrap.c

	$(CC) -fPIC -c raw_pylibcpupower_wrap.c $(PY_INCLUDE)

raw_pylibcpupower_wrap.c: raw_pylibcpupower.i

ifeq ($(HAVE_SWIG),0)

	$(error "swig was not found. Make sure you have it installed and in the PATH to generate the bindings.")

else ifeq ($(HAVE_PYCONFIG),0)

	$(error "python-config was not found. Make sure you have it installed and in the PATH to generate the bindings.")

endif

	swig -python raw_pylibcpupower.i

# Will only clean the bindings folder; will not clean the actual cpupower folder