Allow tslib to be specified at configure time.

Change-Id: I0ebf0eeea7e6a0b8136fb805f34f04082bc58c5e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>

configure

@@ -885,6 +885,7 @@ CFG_KMS=auto
 CFG_LIBUDEV=auto
 CFG_OBSOLETE_WAYLAND=no
 CFG_EVDEV=auto
+CFG_TSLIB=no
 CFG_NIS=auto
 CFG_CUPS=auto
 CFG_ICONV=auto
@@ -1867,6 +1868,13 @@ while [ "$#" -gt 0 ]; do
             UNKNOWN_OPT=yes
         fi
         ;;
+    tslib)
+        if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then
+            CFG_TSLIB="$VAL"
+        else
+            UNKNOWN_OPT=yes
+        fi
+        ;;
     cups)
         if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then
             CFG_CUPS="$VAL"
@@ -5071,6 +5079,18 @@ if [ "$CFG_EVDEV" = "no" ]; then
     QMakeVar add DEFINES QT_NO_EVDEV
 fi
 
+if [ "$CFG_TSLIB" != "no" ]; then
+    if compileTest unix/tslib "tslib"; then
+        CFG_TSLIB=yes
+        QT_CONFIG="$QT_CONFIG tslib"
+    elif [ "$CFG_TSLIB" = "yes" ]; then
+        echo "The tslib functionality test failed!"
+        exit 1
+    else
+        CFG_TSLIB=no
+    fi
+fi
+
 # Check we actually have X11 :-)
 if compileTest x11/xlib "XLib"; then
     QT_CONFIG="$QT_CONFIG xlib"

src/plugins/generic/generic.pro

@@ -5,3 +5,7 @@ TEMPLATE = subdirs
 contains(QT_CONFIG, evdev) {
     SUBDIRS += evdevmouse evdevtouch evdevkeyboard evdevtablet
 }
+
+contains(QT_CONFIG, tslib) {
+    SUBDIRS += tslib
+}