diff --git a/src/actions.c b/src/actions.c
index b088202..6d9b27a 100644
--- a/src/actions.c
+++ b/src/actions.c
@@ -38,6 +38,8 @@
 #include "tag_attributes.h"
 #include "config.h"
 
+int gtkdialog_parse(void);
+
 extern gchar *option_include_file;
 
 /* Local function prototypes */
diff --git a/src/automaton.c b/src/automaton.c
index 857e6e8..dd3edd5 100644
--- a/src/automaton.c
+++ b/src/automaton.c
@@ -87,6 +87,9 @@
 
 #undef TOOLTIPS
 
+int  instruction_execute(instruction);
+void push_widget(GtkWidget *, int);
+
 extern gboolean option_no_warning;
 
 instruction *program = NULL;
@@ -332,7 +335,7 @@ print_program()
 	
 	for (pc = 0; pc < instruction_counter; ++pc) {
 		command = program[pc];
-		g_printf("%5d  ", pc);
+		printf("%5d  ", pc);
 		print_command(command);
 	}
 }
diff --git a/src/glade_support.c b/src/glade_support.c
index 155f5d2..0f3906e 100644
--- a/src/glade_support.c
+++ b/src/glade_support.c
@@ -44,6 +44,7 @@ typedef struct _gtkdialog_signal {
 
 /* function prototypes */
 gint widget_get_type_from_pointer(GtkWidget *widget);
+int execute_action(GtkWidget *widget, const char *command, const char *type);
 
 /*
 ** Signal handler callbascks.
diff --git a/src/gtkdialog.c b/src/gtkdialog.c
index 1368cd9..7b820e3 100644
--- a/src/gtkdialog.c
+++ b/src/gtkdialog.c
@@ -627,6 +627,7 @@ main(int argc, char *argv[])
 	gtk_init(&argc, &argv);
 	
 #if HAVE_GLADE_LIB
+	void run_program_by_glade(const gchar *filename, const gchar *window_name);
 	if (option_glade_file != NULL) {
 		run_program_by_glade(option_glade_file, option_input_variable);
 		exit(EXIT_SUCCESS);
diff --git a/src/gtkdialog_lexer.l b/src/gtkdialog_lexer.l
index abb6d9b..e22f2c8 100644
--- a/src/gtkdialog_lexer.l
+++ b/src/gtkdialog_lexer.l
@@ -44,6 +44,8 @@
 #include "gtkdialog_parser.h"
 
 static gchar *process_string(gchar *str);
+int getnextchar(void);
+int gtkdialog_error(char *);
 
 extern int linenumber;
 gchar *Token;
diff --git a/src/gtkdialog_parser.y b/src/gtkdialog_parser.y
index 25d7105..7f8e1cd 100644
--- a/src/gtkdialog_parser.y
+++ b/src/gtkdialog_parser.y
@@ -60,6 +60,10 @@ extern gboolean option_print_ir;
 //
 int yywarning(char *c);
 void yyerror_simple(char *c);
+void run_program(void);
+void print_program(void);
+int  gtkdialog_lex(void);
+int  gtkdialog_error(char *);
 
 static inline void
 start_up(void) 
diff --git a/src/stringman.c b/src/stringman.c
index 08eae7d..1618469 100644
--- a/src/stringman.c
+++ b/src/stringman.c
@@ -32,6 +32,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <string.h>
+#include <ctype.h>
 #include <gtk/gtk.h>
 
 #include "gtkdialog.h"
diff --git a/src/variables.c b/src/variables.c
index 3a5933e..b3daaf0 100644
--- a/src/variables.c
+++ b/src/variables.c
@@ -61,6 +61,8 @@
 
 extern gboolean option_no_warning;
 
+int yywarning (char *);
+
 /* Local function prototypes */
 #ifdef DEBUG
 void variables_print_one(variable *var);
@@ -1119,7 +1121,7 @@ static gint do_variables_count_widgets(variable *actual, gint n)
 		actual = root;
 
 	if (actual == NULL)
-		return;
+		return n;
 
 	if (actual->left != NULL)
 		n = do_variables_count_widgets(actual->left, n);
diff --git a/src/widget_notebook.c b/src/widget_notebook.c
index 507f309..c25d051 100644
--- a/src/widget_notebook.c
+++ b/src/widget_notebook.c
@@ -28,6 +28,7 @@
 #include "automaton.h"
 #include "widgets.h"
 #include "tag_attributes.h"
+#include "signals.h"
 
 /* Defines */
 //#define DEBUG_CONTENT
diff --git a/src/widget_timer.c b/src/widget_timer.c
index 834455f..4a7e7be 100644
--- a/src/widget_timer.c
+++ b/src/widget_timer.c
@@ -28,6 +28,7 @@
 #include "automaton.h"
 #include "widgets.h"
 #include "tag_attributes.h"
+#include "signals.h"
 
 /* Defines */
 //#define DEBUG_CONTENT