Description: sys/io.h does not exist on all systems
Bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=609152
Author: Scott Howard <showard@debian.org>

Index: rxtx/configure.in
===================================================================
--- rxtx.orig/configure.in	2011-02-23 23:01:09.596613286 -0500
+++ rxtx/configure.in	2011-02-23 23:02:41.269525630 -0500
@@ -71,6 +71,7 @@
 AC_CHECK_HEADERS(sys/time.h)
 AC_CHECK_HEADERS(sys/signal.h)
 AC_CHECK_HEADERS(signal.h)
+AC_CHECK_HEADERS(sys/io.h)
 AC_CHECK_HEADERS(termios.h)
 AC_CHECK_HEADERS(grp.h)
 AC_CHECK_HEADERS(pwd.h)
Index: rxtx/src/RawImp.c
===================================================================
--- rxtx.orig/src/RawImp.c	2011-02-23 23:04:29.641932242 -0500
+++ rxtx/src/RawImp.c	2011-02-23 23:05:40.487353587 -0500
@@ -99,11 +99,17 @@
 #	include <linux/serial.h>
 #	include <linux/version.h>
 #endif
-#ifndef __APPLE__  /* dima */
-#ifndef PPC
-#include <sys/io.h>
-#endif /* PPC */
-#endif /* dima */
+#ifdef HAVE_SYS_IO_H
+#   include <sys/io.h>
+#else
+/* stubs for sys/io.h inl, inw, outb ...*/
+static __inline unsigned char inb (unsigned short int __port) { return 0; }
+static __inline unsigned short int inw (unsigned short int __port) { return 0; }
+static __inline unsigned int inl (unsigned short int __port) { return 0; }
+static __inline void outb (unsigned char __value, unsigned short int __port) {}
+static __inline void outl (unsigned int __value, unsigned short int __port) {}
+static int ioperm (unsigned long int __from, unsigned long int __num, int __turn_on) {return 0; }
+#endif
 
 extern int errno;
 #include "I2CImp.h"
--- rxtx/configure	2019-06-01 19:35:32.980610154 +0000
+++ rxtx/configure	2019-06-01 19:36:46.060942703 +0000
@@ -21150,6 +21150,17 @@
 
 done
 
+for ac_header in sys/io.h
+do :
+  ac_fn_c_check_header_mongrel "$LINENO" "sys/io.h" "ac_cv_header_sys_io_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_io_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_SYS_IO_H 1
+_ACEOF
+
+fi
+
+done
 
 for ac_header in termios.h
 do