powertop: add package

package for monitoring power consumption
001 and 002 patches are taken from Alpine Linux

Signed-off-by: Lucian Cristian <lucian.cristian@gmail.com>

utils/powertop/patches/001-musl-fix-headers.patch

@@ -0,0 +1,22 @@
+--- ./src/devices/devfreq.h.orig
++++ ./src/devices/devfreq.h
+@@ -25,6 +25,7 @@
+ #ifndef _INCLUDE_GUARD_DEVFREQ_H
+ #define _INCLUDE_GUARD_DEVFREQ_H
+ 
++#include <sys/time.h>
+ #include "device.h"
+ #include "../parameters/parameters.h"
+ 
+diff --git a/src/perf/perf.h b/src/perf/perf.h
+index ee072ae06d24..932588a684f9 100644
+--- a/src/perf/perf.h
++++ b/src/perf/perf.h
+@@ -26,6 +26,7 @@
+ #define _INCLUDE_GUARD_PERF_H_
+ 
+ #include <iostream>
++#include <stdio.h>
+ 
+ 
+ extern "C" {

utils/powertop/patches/002-strerror_r.patch

@@ -0,0 +1,20 @@
+--- traceevent/event-parse.c.orig
++++ ./traceevent/event-parse.c
+@@ -5121,12 +5121,17 @@
+ 	const char *msg;
+ 
+ 	if (errnum >= 0) {
++#if defined(__GLIBC__)
+ 		msg = strerror_r(errnum, buf, buflen);
+ 		if (msg != buf) {
+ 			size_t len = strlen(msg);
+ 			memcpy(buf, msg, min(buflen - 1, len));
+ 			*(buf + min(buflen - 1, len)) = '\0';
+ 		}
++#else
++		if (strerror_r(errnum, buf, buflen))
++			snprintf(buf, buflen, "errnum %i", errnum);
++#endif
+ 		return 0;
+ 	}
+ 

utils/powertop/patches/010-src-main-Add-missing-pthread-header.patch

@@ -0,0 +1,38 @@
+From 7235a786ea30ae5ca7c1b3458ef5b2388c08dfd9 Mon Sep 17 00:00:00 2001
+From: Rosen Penev <rosenp@gmail.com>
+Date: Thu, 28 Mar 2019 18:44:27 -0700
+Subject: [PATCH] src/main: Add missing pthread header
+
+Otherwise compilation can fail with:
+
+main.cpp: In function 'void one_measurement(int, int, char*)':
+main.cpp:226:3: error: 'pthread_t' was not declared in this scope
+   pthread_t thread = 0UL;
+   ^~~~~~~~~
+main.cpp:226:3: note: suggested alternative: 'pread'
+   pthread_t thread = 0UL;
+   ^~~~~~~~~
+   pread
+
+et al.
+
+Signed-off-by: Rosen Penev <rosenp@gmail.com>
+---
+ src/main.cpp | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/main.cpp b/src/main.cpp
+index cbb7a4e..75d4202 100644
+--- a/src/main.cpp
++++ b/src/main.cpp
+@@ -39,6 +39,7 @@
+ #include <locale.h>
+ #include <sys/resource.h>
+ #include <limits.h>
++#include <pthread.h>
+ 
+ #include "cpu/cpu.h"
+ #include "process/process.h"
+-- 
+2.17.1
+

utils/powertop/patches/020-intel_cpus.cpp-Change-open-parameter-to-const-char.patch

@@ -0,0 +1,30 @@
+From 8cdf846922ffb3e0d2a828be473fdf9c45a56e7c Mon Sep 17 00:00:00 2001
+From: Rosen Penev <rosenp@gmail.com>
+Date: Sat, 30 Mar 2019 20:19:17 -0700
+Subject: [PATCH] intel_cpus.cpp: Change open parameter to const char *
+
+ifstream::open takes std::string starting with C++11, not before.
+
+This fixes compilation with uClibc++ and potentially other older libraries
+
+Signed-off-by: Rosen Penev <rosenp@gmail.com>
+---
+ src/cpu/intel_cpus.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/cpu/intel_cpus.cpp b/src/cpu/intel_cpus.cpp
+index 0030dba..4dffadc 100644
+--- a/src/cpu/intel_cpus.cpp
++++ b/src/cpu/intel_cpus.cpp
+@@ -92,7 +92,7 @@ int is_supported_intel_cpu(int model, int cpu)
+ 
+ int is_intel_pstate_driver_loaded()
+ {
+-	const string filename("/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver");
++	const char *filename = "/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver";
+ 	const string intel_pstate("intel_pstate");
+ 	char line[32] = { '\0' };
+ 	ifstream file;
+-- 
+2.17.1
+