diff --git a/src/app/tape/tape.pro b/src/app/tape/tape.pro
index 2eb3a9479..b895b7edd 100644
--- a/src/app/tape/tape.pro
+++ b/src/app/tape/tape.pro
@@ -26,6 +26,17 @@ greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
     CONFIG += c++11
 }
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/app/valentina/valentina.pro b/src/app/valentina/valentina.pro
index f3fb38f4f..39926d588 100644
--- a/src/app/valentina/valentina.pro
+++ b/src/app/valentina/valentina.pro
@@ -39,6 +39,17 @@ greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
     CONFIG += c++11
 }
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/fervor/fervor.pro b/src/libs/fervor/fervor.pro
index b39e0a18c..7da808e82 100644
--- a/src/libs/fervor/fervor.pro
+++ b/src/libs/fervor/fervor.pro
@@ -22,6 +22,17 @@ CONFIG += \
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/ifc/ifc.pro b/src/libs/ifc/ifc.pro
index 4d7ceb5b9..c0a7766a2 100644
--- a/src/libs/ifc/ifc.pro
+++ b/src/libs/ifc/ifc.pro
@@ -26,6 +26,17 @@ CONFIG += \
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/qmuparser/qmuparser.pro b/src/libs/qmuparser/qmuparser.pro
index 0ca5f1ea7..275fcd871 100644
--- a/src/libs/qmuparser/qmuparser.pro
+++ b/src/libs/qmuparser/qmuparser.pro
@@ -27,6 +27,17 @@ greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
     CONFIG += c++11
 }
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vdxf/vdxf.pro b/src/libs/vdxf/vdxf.pro
index a94260869..92e6d5942 100644
--- a/src/libs/vdxf/vdxf.pro
+++ b/src/libs/vdxf/vdxf.pro
@@ -29,6 +29,17 @@ greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vformat/vformat.pro b/src/libs/vformat/vformat.pro
index 550cb6810..153494020 100644
--- a/src/libs/vformat/vformat.pro
+++ b/src/libs/vformat/vformat.pro
@@ -26,6 +26,17 @@ CONFIG += \
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vgeometry/vgeometry.pro b/src/libs/vgeometry/vgeometry.pro
index cac11c1ba..d8ce46822 100644
--- a/src/libs/vgeometry/vgeometry.pro
+++ b/src/libs/vgeometry/vgeometry.pro
@@ -22,6 +22,17 @@ CONFIG += \
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vlayout/vlayout.pro b/src/libs/vlayout/vlayout.pro
index 25352a9cf..d5b46d6b8 100644
--- a/src/libs/vlayout/vlayout.pro
+++ b/src/libs/vlayout/vlayout.pro
@@ -22,6 +22,17 @@ CONFIG += \
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vmisc/vmisc.pro b/src/libs/vmisc/vmisc.pro
index b57844181..cf8db513f 100644
--- a/src/libs/vmisc/vmisc.pro
+++ b/src/libs/vmisc/vmisc.pro
@@ -28,6 +28,17 @@ greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vobj/vobj.pro b/src/libs/vobj/vobj.pro
index 33a9c6a7a..f57c75f5a 100644
--- a/src/libs/vobj/vobj.pro
+++ b/src/libs/vobj/vobj.pro
@@ -20,6 +20,17 @@ CONFIG += \
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vpatterndb/vpatterndb.pro b/src/libs/vpatterndb/vpatterndb.pro
index 157d28b34..c6ac14042 100644
--- a/src/libs/vpatterndb/vpatterndb.pro
+++ b/src/libs/vpatterndb/vpatterndb.pro
@@ -22,6 +22,17 @@ CONFIG += \
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vpropertyexplorer/vpropertyexplorer.pro b/src/libs/vpropertyexplorer/vpropertyexplorer.pro
index 10fda7bbb..df126b654 100644
--- a/src/libs/vpropertyexplorer/vpropertyexplorer.pro
+++ b/src/libs/vpropertyexplorer/vpropertyexplorer.pro
@@ -27,6 +27,17 @@ greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
     CONFIG += c++11
 }
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vtest/vtest.pro b/src/libs/vtest/vtest.pro
index 06665a75e..3fbfb0106 100644
--- a/src/libs/vtest/vtest.pro
+++ b/src/libs/vtest/vtest.pro
@@ -28,6 +28,17 @@ greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vtools/vtools.pro b/src/libs/vtools/vtools.pro
index bcbe5e01f..fb132be42 100644
--- a/src/libs/vtools/vtools.pro
+++ b/src/libs/vtools/vtools.pro
@@ -22,6 +22,17 @@ CONFIG += \
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/libs/vwidgets/vwidgets.pro b/src/libs/vwidgets/vwidgets.pro
index 9f9b80679..e20521be3 100644
--- a/src/libs/vwidgets/vwidgets.pro
+++ b/src/libs/vwidgets/vwidgets.pro
@@ -22,6 +22,17 @@ CONFIG += \
 # Use out-of-source builds (shadow builds)
 CONFIG -= debug_and_release debug_and_release_target
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Qt 5.4.0 the source code location is recorded only in debug builds.
 # We need this information also in release builds. For this need define QT_MESSAGELOGCONTEXT.
 DEFINES += QT_MESSAGELOGCONTEXT
diff --git a/src/test/CollectionTest/CollectionTest.pro b/src/test/CollectionTest/CollectionTest.pro
index a0ec710e8..920818aca 100644
--- a/src/test/CollectionTest/CollectionTest.pro
+++ b/src/test/CollectionTest/CollectionTest.pro
@@ -20,6 +20,17 @@ TEMPLATE = app
 # Can configure it not to do that with 'no_testcase_installs'
 CONFIG += testcase no_testcase_installs
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Q5.4 available support C++14
 greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
     CONFIG += c++14
diff --git a/src/test/ParserTest/ParserTest.pro b/src/test/ParserTest/ParserTest.pro
index f9fe9698a..2a2e0f3f8 100644
--- a/src/test/ParserTest/ParserTest.pro
+++ b/src/test/ParserTest/ParserTest.pro
@@ -26,6 +26,17 @@ CONFIG   += console c++11
 # Can configure it not to do that with 'no_testcase_installs'
 CONFIG += testcase no_testcase_installs
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Use out-of-source builds (shadow builds)
 CONFIG   -= app_bundle debug_and_release debug_and_release_target
 
diff --git a/src/test/TranslationsTest/TranslationsTest.pro b/src/test/TranslationsTest/TranslationsTest.pro
index 48a0e2e3a..e2d9614a4 100644
--- a/src/test/TranslationsTest/TranslationsTest.pro
+++ b/src/test/TranslationsTest/TranslationsTest.pro
@@ -18,6 +18,17 @@ include(../../../common.pri)
 # Can configure it not to do that with 'no_testcase_installs'
 CONFIG += testcase no_testcase_installs
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Q5.4 available support C++14
 greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
     CONFIG += c++14
diff --git a/src/test/ValentinaTest/ValentinaTest.pro b/src/test/ValentinaTest/ValentinaTest.pro
index 21a019488..52f6fe229 100644
--- a/src/test/ValentinaTest/ValentinaTest.pro
+++ b/src/test/ValentinaTest/ValentinaTest.pro
@@ -16,6 +16,17 @@ include(../../../common.pri)
 # Can configure it not to do that with 'no_testcase_installs'
 CONFIG += testcase no_testcase_installs
 
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
 # Since Q5.4 available support C++14
 greaterThan(QT_MAJOR_VERSION, 4):greaterThan(QT_MINOR_VERSION, 3) {
     CONFIG += c++14