diff -ruN a/src/filter.c b/src/filter.c
--- a/src/filter.c	2025-03-12 07:46:22.000000000 +0100
+++ b/src/filter.c	2025-05-03 18:42:46.418977873 +0200
@@ -38,6 +38,7 @@
 #include "epson-escpr-api.h"
 #include "epson-escpr-services.h"
 #include "epson-escpr-mem.h"
+#include "epson-escpr-services.h"
 
 #include "err.h"
 #include "mem.h"
@@ -47,6 +48,11 @@
 #include "optBase.h"
 #include "linux_cmn.h"
 #include "custompage.h"
+#include "xfifo.h"
+
+extern EPS_ERR_CODE SetupJobAttrib (const EPS_JOB_ATTRIB*);
+extern EPS_ERR_CODE SendStartJob (int);
+extern EPS_ERR_CODE PrintBand (const EPS_UINT8*, EPS_UINT32, EPS_UINT32*);
 
 #define WIDTH_BYTES(bits) (((bits) + 31) / 32 * 4)
 
@@ -453,7 +459,7 @@
 	}
 	
 	printJob.jobStatus = EPS_STATUS_ESTABLISHED;
-	int printHeight = 0;
+	EPS_UINT32 printHeight = 0;
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////	
 
 	print_area_x = printJob.printableAreaWidth;
@@ -624,7 +630,7 @@
 						memcpy(rever_buf + k*3, startpage + pos + (bandBmp.widthBytes - 6) - k*3, 3);
 					}
 				}
-				PrintBand (rever_buf, bandBmp.widthBytes, &printHeight);
+				PrintBand ((const EPS_UINT8 *)rever_buf, bandBmp.widthBytes, &printHeight);
 				pos -= bandBmp.widthBytes;
 			}
 
@@ -918,7 +924,7 @@
 
 	/* Get number of pages */
 	char page_num;
-	read (STDIN_FILENO, &page_num, 1);
+	(void)read (STDIN_FILENO, &page_num, 1);
 	debug_msg("total pages = %d\n", page_num);
 
 	/* Others */
diff -ruN a/src/mem.c b/src/mem.c
--- a/src/mem.c	2023-10-17 09:37:18.000000000 +0200
+++ b/src/mem.c	2025-05-03 18:37:18.940061028 +0200
@@ -23,6 +23,7 @@
 
 #include <stdlib.h>
 #include "mem.h"
+#include "err.h"
 
 void *
 mem_malloc (unsigned int size, bool_t crit)
diff -ruN a/src/wrapper.c b/src/wrapper.c
--- a/src/wrapper.c	2025-03-12 07:47:23.000000000 +0100
+++ b/src/wrapper.c	2025-05-03 18:37:18.940134498 +0200
@@ -33,6 +33,7 @@
 /* added 22-04-2004 */
 #include <signal.h>
 
+#include "custompage.h"
 #include "libprtX.h"
 
 #define HAVE_PPM_W 0