Using autoconf check to detect if there's a parallel port.

acinclude.m4

@@ -152,16 +152,31 @@ dnl				else
 			)
 			;;
 		sed1330)
-			DRIVERS="$DRIVERS sed1330${SO}"
-			actdrivers=["$actdrivers sed1330"]
+			if test "$ac_cv_port_have_lpt" = yes
+			then
+				DRIVERS="$DRIVERS sed1330${SO}"
+				actdrivers=["$actdrivers sed1330"]
+			else
+				AC_MSG_WARN([The sed1330 driver needs a parallel port.])
+			fi
 			;;
 		sed1520)
-			DRIVERS="$DRIVERS sed1520${SO}"
-			actdrivers=["$actdrivers sed1520"]
+			if test "$ac_cv_port_have_lpt" = yes
+			then
+				DRIVERS="$DRIVERS sed1520${SO}"
+				actdrivers=["$actdrivers sed1520"]
+			else
+				AC_MSG_WARN([The sed1330 driver needs a parallel port.])
+			fi
 			;;
 		stv5730)
-			DRIVERS="$DRIVERS stv5730${SO}"
-			actdrivers=["$actdrivers stv5730"]
+			if test "$ac_cv_port_have_lpt" = yes
+			then
+				DRIVERS="$DRIVERS stv5730${SO}"
+				actdrivers=["$actdrivers stv5730"]
+			else
+				AC_MSG_WARN([The sed1330 driver needs a parallel port.])
+			fi
 			;;
 		svga)
 			AC_CHECK_LIB(vga, main,
@@ -179,8 +194,13 @@ dnl			else
 			)
 			;;
 		t6963)
-			DRIVERS="$DRIVERS t6963${SO}"
-			actdrivers=["$actdrivers t6963"]
+			if test "$ac_cv_port_have_lpt" = yes
+			then
+				DRIVERS="$DRIVERS t6963${SO}"
+				actdrivers=["$actdrivers t6963"]
+			else
+				AC_MSG_WARN([The sed1330 driver needs a parallel port.])
+			fi
 			;;
 	*)
 			AC_MSG_ERROR([Unknown driver $driver])

configure.in

@@ -82,7 +82,7 @@ AC_CHECK_LIB(kvm, kvm_open,[
 ])
 
 dnl NetBSD, OpenBSD and FreeBSD
-AC_CHECK_HEADERS(sched.h sys/sched.h sys/types.h machine/pio.h machine/sysarch.h)
+AC_CHECK_HEADERS(sched.h sys/sched.h machine/cpufunc.h sys/types.h machine/pio.h machine/sysarch.h)
 ETR_SYSV_IPC
 ETR_UNION_SEMUN
 
@@ -97,6 +97,21 @@ AC_CHECK_LIB(i386, i386_get_ioperm,
         [])]
 )
 
+AC_CHECK_FUNCS(ioperm)
+AC_CHECK_HEADERS(sys/io.h)
+
+dnl Check if we support this parallel (LPT) port
+dnl IMPORTANT: we must do all the checks used in port.h before doing this test!
+AC_CACHE_CHECK([for a parallel port], ac_cv_port_have_lpt,
+[AC_TRY_COMPILE([#include "server/drivers/port.h"], [char val = port_in(0x350)], ac_cv_port_have_lpt=yes, ac_cv_port_have_lpt=no)])
+
+if test "$ac_cv_port_have_lpt" = yes
+then
+	AC_DEFINE([HAVE_LPT_PORT],[1],[Define if you have a parallel port and LCDproc knows how to talk to it.])
+else
+	AC_MSG_WARN([Can't talk to the parallel port, disabling drivers that use it.])
+fi
+
 dnl Checks for header files.
 AC_HEADER_DIRENT
 AC_HEADER_STDC

server/drivers/port.h

@@ -86,7 +86,7 @@ static inline int port_deny_full (unsigned short int port) {
 
 /*  ------------------------------------------------------------- */
 /*  Use i386_get_ioperm, i386_set_ioperm, inb and outb from <machine/pio.h> (NetBSD&OpenBSD) */
-#elif defined HAVE_I386_IOPERM_NETBSD && defined HAVE_MACHINE_PIO_H && defined HAVE_MACHINE_SYSARCH_H
+#elif defined HAVE_I386_IOPERM_NETBSD && defined HAVE_MACHINE_PIO_H && defined HAVE_MACHINE_SYSARCH_H && defined HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #include <machine/pio.h>
 #include <machine/sysarch.h>
@@ -175,7 +175,7 @@ static inline int port_deny_full (unsigned short int port) {
 /*#endif // defined HAVE_I386_IOPERM_NETBSD && defined HAVE_MACHINE_PIO_H && defined HAVE_MACHINE_SYSARCH_H
 -------------------------------------------------------------
 Use i386_get_ioperm, i386_set_ioperm from <machine/sysarch.h> and inb and outb from <machine/cpufunc.h> (FreeBSD) */
-#elif defined HAVE_I386_IOPERM_FREEBSD && defined HAVE_MACHINE_SYSARCH_H
+#elif defined HAVE_I386_IOPERM_FREEBSD && defined HAVE_MACHINE_CPUFUNC_H && defined HAVE_MACHINE_SYSARCH_H && defined HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #include <machine/cpufunc.h>
 #include <machine/sysarch.h>

server/drivers/timing.h

@@ -66,14 +66,14 @@
 #if defined DELAY_GETTIMEOFDAY
 # undef DELAY_NANOSLEEP
 # undef DELAY_IOCALLS
-#elif defined DELAY_NANOSLEEP
-# undef DELAY_GETTIMEOFDAY
-# undef DELAY_IOCALLS
-# include <sched.h>
-#else    // assume  DELAY_IOCALLS
+#elif defined DELAY_IOCALLS && defined HAVE_LPT_PORT
 # undef DELAY_GETTIMEOFDAY
 # undef DELAY_NANOSLEEP
 # include "port.h"
+#else // assume DELAY_NANOSLEEP
+# undef DELAY_GETTIMEOFDAY
+# undef DELAY_IOCALLS
+# include <sched.h>
 #endif
 
 /////////////////////////////////////////////////////////////////