autoconf: fix obsolete macros, check for pkg-config macros, show drivers to be compiled

ChangeLog

@@ -58,6 +58,7 @@ v.0.5dev (ongoing development)
  + picolcd driver: support for 20x4 picoLCDs (Nicu Pavel)
  + hd44780 driver: new ConnectionType uss720 (Eric Pooch)
  * new make targets to compile & install server & clients separately
+ * autoconf fixes: check for pkg-config macros
 
 v.0.5.2
  * fix switching on/off the Load screen in lcdproc client using the menu

acinclude.m4

@@ -2,7 +2,7 @@ dnl
 dnl Define function/macro for driver selection using the --enable-drivers=... option
 dnl
 AC_DEFUN([LCD_DRIVERS_SELECT], [
-AC_CHECKING(which drivers to compile)
+AC_MSG_NOTICE([checking which drivers to compile...])
 
 AC_ARG_ENABLE(drivers,
 	[  --enable-drivers=<list> compile drivers for LCDs in <list>,]
@@ -458,8 +458,12 @@ dnl			else
 	esac
 done
 
-actdrivers=`echo $actdrivers | sed -e 's/ /,/g'`
-AC_MSG_RESULT([Will compile drivers: $actdrivers])
+AC_MSG_RESULT([---------------------------------------])
+AC_MSG_RESULT([LCDd will be compiled with the drivers:])
+for driver in $actdrivers; do
+	AC_MSG_RESULT([    -  $driver])
+done	
+AC_MSG_RESULT([---------------------------------------])
 
 AC_SUBST(LIBCURSES)
 AC_SUBST(LIBIRMAN)
@@ -545,7 +549,7 @@ AC_DEFUN([AC_GET_FS_INFO], [
         ])
     AC_CHECK_FUNCS(getmntinfo)
 
-    AC_CHECKING(how to get filesystem space usage)
+    AC_MSG_NOTICE([checking how to get filesystem space usage...])
     space=no
 
     # Here we'll compromise a little (and perform only the link test)

configure.in

@@ -242,9 +242,11 @@ AC_ARG_ENABLE(libusb,
 AC_MSG_RESULT($enable_libusb) 
 
 if test "$enable_libusb" = "yes"; then
-	PKG_CHECK_MODULES(LIBUSB, libusb,
-		[AC_DEFINE(HAVE_LIBUSB, [1], [Define to 1 if you have libusb])],
-		[ enable_libusb=no ])
+	ifdef([PKG_CHECK_MODULES],
+		[PKG_CHECK_MODULES(LIBUSB, libusb,
+			[AC_DEFINE(HAVE_LIBUSB, [1], [Define to 1 if you have libusb])],
+			[ enable_libusb=no ])],
+		[AC_MSG_WARN([pkg-config not (fully) installed; drivers requiring libusb may not be built])])	
 fi
 AC_SUBST(LIBUSB_LIBS)
 AC_SUBST(LIBUSB_CFLAGS)
@@ -263,9 +265,11 @@ AC_ARG_ENABLE(libftdi,
 AC_MSG_RESULT($enable_libftdi) 
 
 if test "$enable_libftdi" = "yes"; then
- 	PKG_CHECK_MODULES(LIBFTDI, libftdi >= 0.8,
-		[AC_DEFINE(HAVE_LIBFTDI, [1], [Define to 1 if you have libftdi])],
-		[ enable_libftdi=no ])
+	ifdef([PKG_CHECK_MODULES],
+	 	[PKG_CHECK_MODULES(LIBFTDI, libftdi >= 0.8,
+			[AC_DEFINE(HAVE_LIBFTDI, [1], [Define to 1 if you have libftdi])],
+			[ enable_libftdi=no ])],
+		[AC_MSG_WARN([pkg-config not (fully) installed; drivers requiring libftdi may not be built])])	
 fi
 AC_SUBST(LIBFTDI_LIBS)
 AC_SUBST(LIBFTDI_CFLAGS)
@@ -284,8 +288,11 @@ AC_ARG_ENABLE(ethlcd,
 AC_MSG_RESULT($enable_ethlcd) 
 
 
+# check for doxygen
+BB_ENABLE_DOXYGEN
 
-dnl Select drivers to build
+
+# Select drivers to build
 LCD_DRIVERS_SELECT
 
 
@@ -364,9 +371,6 @@ AC_ARG_ENABLE(stat-smbfs,
 )
 
 
-# check for doxygen
-BB_ENABLE_DOXYGEN
-
 AC_CONFIG_FILES([Makefile
 	shared/Makefile
 	server/Makefile