Support default C++98 targets (remove C++11 used elements)

Author: J-Rios

src/minbasecli.cpp

@@ -72,7 +72,7 @@ MINBASECLI::MINBASECLI()
     {
         this->added_commands[i].command[0] = '\0';
         this->added_commands[i].description[0] = '\0';
-        this->added_commands[i].callback = nullptr;
+        this->added_commands[i].callback = NULL;
     }
     memset(this->rx_read, (int)('\0'), MINBASECLI_MAX_READ_SIZE - 1U);
     memset(this->print_array, (int)('\0'), MINBASECLI_MAX_PRINT_SIZE - 1U);

src/minbasecli.h

@@ -81,7 +81,7 @@
 
 /*****************************************************************************/
 
-/* Constants & Defines */
+/* Configuration Defines */
 
 // Default CLI Interface to use if not provided
 #if !defined(MINBASECLI_DEFAULT_IFACE)
@@ -130,6 +130,20 @@
 
 /*****************************************************************************/
 
+/* Constants */
+
+/**
+ * @brief Builtin command "help" text.
+ */
+static const char CMD_HELP[] = "help";
+
+/**
+ * @brief Builtin command "help" description text.
+ */
+static const char CMD_HELP_DESCRIPTION[] = "Shows current info.";
+
+/*****************************************************************************/
+
 /* Data Types */
 
 // CLI manage result data
@@ -233,16 +247,6 @@ class MINBASECLI : public MINBASECLI_HAL
 
     private:
 
-        /**
-         * @brief Builtin command "help" text.
-         */
-        static constexpr char CMD_HELP[] = "help";
-
-        /**
-         * @brief Builtin command "help" description text.
-         */
-        static constexpr char CMD_HELP_DESCRIPTION[] = "Shows current info.";
-
         /**
          * @brief CLI initialized flag.
          */