gcc-4.7 requires unistd include on several places.
---
 cpu/intel_cpus.cpp         |    1 +
 devices/alsa.cpp           |    1 +
 devices/device.cpp         |    1 +
 devices/i915-gpu.cpp       |    1 +
 devices/network.cpp        |    1 +
 devices/rfkill.cpp         |    1 +
 devices/thinkpad-fan.cpp   |    1 +
 devices/thinkpad-light.cpp |    1 +
 8 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/cpu/intel_cpus.cpp b/cpu/intel_cpus.cpp
index db5afb2..8a50dd5 100644
--- a/cpu/intel_cpus.cpp
+++ b/cpu/intel_cpus.cpp
@@ -34,6 +34,7 @@
 #include <sys/time.h>
 #include <string.h>
 #include <errno.h>
+#include <unistd.h>
 
 #include "../lib.h"
 #include "../parameters/parameters.h"
diff --git a/devices/alsa.cpp b/devices/alsa.cpp
index 9f56826..2c0b03f 100644
--- a/devices/alsa.cpp
+++ b/devices/alsa.cpp
@@ -28,6 +28,7 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <dirent.h>
+#include <unistd.h>
 
 
 using namespace std;
diff --git a/devices/device.cpp b/devices/device.cpp
index 09b2d97..6fc72a6 100644
--- a/devices/device.cpp
+++ b/devices/device.cpp
@@ -29,6 +29,7 @@
 #include <stdio.h>
 #include <limits.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 using namespace std;
 
diff --git a/devices/i915-gpu.cpp b/devices/i915-gpu.cpp
index 57cfc67..bcc07cc 100644
--- a/devices/i915-gpu.cpp
+++ b/devices/i915-gpu.cpp
@@ -28,6 +28,7 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <dirent.h>
+#include <unistd.h>
 
 
 using namespace std;
diff --git a/devices/network.cpp b/devices/network.cpp
index 1eaaafc..6025787 100644
--- a/devices/network.cpp
+++ b/devices/network.cpp
@@ -33,6 +33,7 @@
 #include <dirent.h>
 #include <libgen.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 #include <linux/ethtool.h>
 
diff --git a/devices/rfkill.cpp b/devices/rfkill.cpp
index 6bfcf07..5a1f8ac 100644
--- a/devices/rfkill.cpp
+++ b/devices/rfkill.cpp
@@ -29,6 +29,7 @@
 #include <sys/types.h>
 #include <dirent.h>
 #include <libgen.h>
+#include <unistd.h>
 
 
 using namespace std;
diff --git a/devices/thinkpad-fan.cpp b/devices/thinkpad-fan.cpp
index 939a826..9f470e4 100644
--- a/devices/thinkpad-fan.cpp
+++ b/devices/thinkpad-fan.cpp
@@ -29,6 +29,7 @@
 #include <sys/types.h>
 #include <dirent.h>
 #include <math.h>
+#include <unistd.h>
 
 #include "../lib.h"
 
diff --git a/devices/thinkpad-light.cpp b/devices/thinkpad-light.cpp
index 0b9f67e..e5fde10 100644
--- a/devices/thinkpad-light.cpp
+++ b/devices/thinkpad-light.cpp
@@ -29,6 +29,7 @@
 #include <sys/types.h>
 #include <dirent.h>
 #include <math.h>
+#include <unistd.h>
 
 #include "../lib.h"
 
-- 
1.7.7.5

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