allow build against custom version of qscintilla. see issue 1493

scintilla.pri

@@ -4,23 +4,46 @@ scintilla {
 
   DEFINES += USE_SCINTILLA_EDITOR
 
+  QSCILOADED =
+  OPENSCAD_LIBDIR = $$(OPENSCAD_LIBRARIES)
+
+  !isEmpty(OPENSCAD_LIBDIR) {
+    exists($$OPENSCAD_LIBDIR) {
+      exists($$OPENSCAD_LIBDIR/lib/x86_64-linux-gnu/qt5/mkspecs/features/qscintilla2.prf) {
+        include($$OPENSCAD_LIBDIR/lib/x86_64-linux-gnu/qt5/mkspecs/features/qscintilla2.prf)
+        INCLUDEPATH = $$OPENSCAD_LIBDIR/include/qt5 $$INCLUDEPATH
+        LIBS = -L$$OPENSCAD_LIBDIR/lib/x86_64-linux-gnu $$LIBS
+        QSCILOADED=yes
+      }
+    }
+  }
+
   # The qscintilla2.prf which ships with QScintilla is broken for Mac/Windows
   # debug builds, so we supply our own
-  win32|macx: {
-    include(qscintilla2.prf)
+  isEmpty(QSCILOADED) {
+    win32|macx: {
+      include(qscintilla2.prf)
+      QSCILOADED=yes
+    }
   }
-  else: {
+
+  isEmpty(QSCILOADED) {
     load(qscintilla2) {
+      QSCILOADED=yes
       # All good, found installed *.prf file.
-    } else {
-      # Older scintilla libs (e.g. 2.7.2 on fedora20) do not provide the
-      # prf file.
-      #
-      # In addition Ubuntu (and maybe other distributions) have the Qt5
-      # prf file in the wrong location so it's not picked up by qmake
-      #
-      message("Using local copy of qscintilla2.prf instead.")
-      include(qscintilla2.prf)
     }
   }
+
+  isEmpty(QSCILOADED) {
+    # Older scintilla libs (e.g. 2.7.2 on fedora20) do not provide the
+    # prf file.
+    #
+    # In addition Ubuntu (and maybe other distributions) have the Qt5
+    # prf file in the wrong location so it's not picked up by qmake
+    #
+    message("Using local copy of qscintilla2.prf instead.")
+    include(qscintilla2.prf)
+    QSCILOADED=yes
+  }
+
 }

scripts/uni-build-dependencies.sh

@@ -190,7 +190,11 @@ build_qt5scintilla2()
   tar xzf QScintilla-gpl-$version.tar.gz
   cd QScintilla-gpl-$version/Qt4Qt5/
   qmake CONFIG+=staticlib
-  make -j"$NUMCPU" install
+  tmpinstalldir=$DEPLOYDIR/tmp/qsci$version
+  INSTALL_ROOT=$tmpinstalldir make -j"$NUMCPU" install
+  cp -av $tmpinstalldir/usr/share $DEPLOYDIR/
+  cp -av $tmpinstalldir/usr/include $DEPLOYDIR/
+  cp -av $tmpinstalldir/usr/lib $DEPLOYDIR/
 }
 
 build_bison()