diff -rupN --no-dereference poppler-0.90.1/glib/CMakeLists.txt poppler-0.90.1-new/glib/CMakeLists.txt
--- poppler-0.90.1/glib/CMakeLists.txt	2020-07-11 18:39:45.000000000 +0200
+++ poppler-0.90.1-new/glib/CMakeLists.txt	2020-07-21 15:08:33.606421697 +0200
@@ -4,7 +4,6 @@ include_directories(
 )
 
 include_directories(
-  SYSTEM
   ${GLIB2_INCLUDE_DIRS}
   ${CAIRO_INCLUDE_DIRS}
 )
diff -rupN --no-dereference poppler-0.90.1/qt6/src/poppler-annotation-private.h.orig poppler-0.90.1-new/qt6/src/poppler-annotation-private.h.orig
--- poppler-0.90.1/qt6/src/poppler-annotation-private.h.orig	2020-07-11 18:39:45.000000000 +0200
+++ poppler-0.90.1-new/qt6/src/poppler-annotation-private.h.orig	1970-01-01 01:00:00.000000000 +0100
@@ -1,115 +0,0 @@
-/* poppler-annotation-private.h: qt interface to poppler
- * Copyright (C) 2007, Pino Toscano <pino@kde.org>
- * Copyright (C) 2012, Tobias Koenig <tokoe@kdab.com>
- * Copyright (C) 2012, 2013 Fabio D'Urso <fabiodurso@hotmail.it>
- * Copyright (C) 2012, 2014, 2018, Albert Astals Cid <aacid@kde.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#ifndef _POPPLER_ANNOTATION_PRIVATE_H_
-#define _POPPLER_ANNOTATION_PRIVATE_H_
-
-#include <QtCore/QLinkedList>
-#include <QtCore/QPointF>
-#include <QtCore/QSharedDataPointer>
-
-#include "poppler-annotation.h"
-
-#include <Object.h>
-
-class Annot;
-class AnnotPath;
-class Link;
-class Page;
-class PDFRectangle;
-
-namespace Poppler
-{
-class DocumentData;
-
-class AnnotationPrivate : public QSharedData
-{
-    public:
-        AnnotationPrivate();
-        virtual ~AnnotationPrivate();
-
-        AnnotationPrivate(const AnnotationPrivate &) = delete;
-        AnnotationPrivate& operator=(const AnnotationPrivate &) = delete;
-
-        void addRevision(Annotation *ann, Annotation::RevScope scope, Annotation::RevType type);
-
-        /* Returns an Annotation of the right subclass whose d_ptr points to
-         * this AnnotationPrivate */
-        virtual Annotation * makeAlias() = 0;
-
-        /* properties: contents related */
-        QString author;
-        QString contents;
-        QString uniqueName;
-        QDateTime modDate;       // before or equal to currentDateTime()
-        QDateTime creationDate;  // before or equal to modifyDate
-
-        /* properties: look/interaction related */
-        int flags;
-        QRectF boundary;
-
-        /* style and popup */
-        Annotation::Style style;
-        Annotation::Popup popup;
-
-        /* revisions */
-        Annotation::RevScope revisionScope;
-        Annotation::RevType revisionType;
-        QList<Annotation*> revisions;
-
-        /* After this call, the Annotation object will behave like a wrapper for
-         * the specified Annot object. All cached values are discarded */
-        void tieToNativeAnnot(Annot *ann, ::Page *page, DocumentData *doc);
-
-        /* Creates a new Annot object on the specified page, flushes current
-         * values to that object and ties this Annotation to that object */
-        virtual Annot* createNativeAnnot(::Page *destPage, DocumentData *doc) = 0;
-
-        /* Inited to 0 (i.e. untied annotation) */
-        Annot *pdfAnnot;
-        ::Page *pdfPage;
-        DocumentData * parentDoc;
-
-        /* The following helpers only work if pdfPage is set */
-        void flushBaseAnnotationProperties();
-        void fillNormalizationMTX(double MTX[6], int pageRotation) const;
-        void fillTransformationMTX(double MTX[6]) const;
-        QRectF fromPdfRectangle(const PDFRectangle &r) const;
-        PDFRectangle boundaryToPdfRectangle(const QRectF &r, int flags) const;
-        AnnotPath * toAnnotPath(const QLinkedList<QPointF> &l) const;
-
-        /* Scan page for annotations, parentId=0 searches for root annotations, subtypes empty means all subtypes */
-        static QList<Annotation*> findAnnotations(::Page *pdfPage, DocumentData *doc, const QSet<Annotation::SubType> &subtypes, int parentId = -1);
-
-        /* Add given annotation to given page */
-        static void addAnnotationToPage(::Page *pdfPage, DocumentData *doc, const Annotation * ann);
-
-        /* Remove annotation from page and destroy ann */
-        static void removeAnnotationFromPage(::Page *pdfPage, const Annotation * ann);
-
-        Ref pdfObjectReference() const;
-
-        Link* additionalAction( Annotation::AdditionalActionType type ) const;
-};
-
-}
-
-#endif
diff -rupN --no-dereference poppler-0.90.1/test/CMakeLists.txt poppler-0.90.1-new/test/CMakeLists.txt
--- poppler-0.90.1/test/CMakeLists.txt	2020-07-11 18:39:45.000000000 +0200
+++ poppler-0.90.1-new/test/CMakeLists.txt	2020-07-21 15:08:33.607421695 +0200
@@ -18,7 +18,6 @@ endif ()
 if (GTK_FOUND)
 
   include_directories(
-    SYSTEM
     ${GTK3_INCLUDE_DIRS}
   )