README.md: Update.

README.md

@@ -93,6 +93,7 @@ PREFIX=/usr/local/ make install
 | install         | Install the libraries and necessary include header files.   |
 | uninstall       | Uninstall the libraries and necessary include header files. |
 | clean           | Clean up build artifacts.                                   |
+| distclean       | Remove all directories created while any build step.        |
 | build_unit_test | Build the unit tests.                                       |
 | exec_unit_test  | Execute the unit tests.                                     |
 | coverage        | Determine code coverage of the unit tests.                  |

src/gpio.c

@@ -9,7 +9,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
-#include <gpio_sys.h>
+#include <gpio.h>
 
 #define IN	0
 #define OUT	1
@@ -22,6 +22,7 @@ static int gpio_export(int pin);
 static int gpio_unexport(int pin);
 static int gpio_set_direction(int pin, int dir);
 
+// cppcheck-suppress unusedFunction
 int gpio_open(const struct gpio_sys *gpio)
 {
     int res;
@@ -41,6 +42,7 @@ int gpio_open(const struct gpio_sys *gpio)
     return 0;
 }
 
+// cppcheck-suppress unusedFunction
 int gpio_close(const struct gpio_sys *gpio)
 {
     int res;
@@ -58,6 +60,7 @@ int gpio_close(const struct gpio_sys *gpio)
     return 0;
 }
 
+// cppcheck-suppress unusedFunction
 int gpio_direction(struct gpio_sys *gpio, int direction)
 {
     int res;
@@ -76,6 +79,7 @@ int gpio_direction(struct gpio_sys *gpio, int direction)
     return 0;
 }
 
+// cppcheck-suppress unusedFunction
 int gpio_read(const struct gpio_sys *gpio)
 {
     char path[VALUE_MAX];
@@ -99,6 +103,7 @@ int gpio_read(const struct gpio_sys *gpio)
     return(atoi(value_str));
 }
 
+// cppcheck-suppress unusedFunction
 int gpio_write(const struct gpio_sys *gpio, int value)
 {
     static const char s_values_str[] = "01";