[Backport] Several fixes and patches (commontk#89)

(cherry-picked and adapted from MeVisLab/pythonqt@1e794e5)

* minor improvements in code and unit tests
* disable warnings for deprecated declarations
* add -Wpedantic and even -Werror for src, but relax some warnings
* fix undefined behavior
* fix memory leaks
* use QT_NO_CAST_TO_ASCII  to prevent incorrect behavior on non-Latin1 input

* Improvements in build and CI:
** add parallel build
** add `make check` support
** fix `debug`/`release` builds
** force C++11
** introduce UBSan into CI
** fixes for macOS build with clang
** add pkg-config support:
  if PKGCONFIG is set, skip old-style lookup (useful on Linux and macOS GHA,
  when `python-config` returns incorrect linkage options with missing `-Ldirs`)
** add macOS GHA CI

Author: iakov

PythonQt.pro

@@ -1,4 +1,6 @@
 TEMPLATE = subdirs
 
-CONFIG += ordered
 SUBDIRS = generator src extensions tests examples
+tests.depends += src extensions
+extensions.depends += src
+examples.depends += src extensions

build/common.prf

@@ -69,4 +69,5 @@ PYTHONQT_GENERATED_PATH = $$PWD/../generated_cpp
 VERSION = 3.2.0
 
 win32: CONFIG += skip_target_version_ext
-unix: QMAKE_CXXFLAGS += -std=c++11
+unix: CONFIG += c++11
+gcc: QMAKE_CXXFLAGS += -Wno-deprecated-declarations

build/python.prf

@@ -17,9 +17,27 @@ isEmpty( PYTHON_DIR ) {
   PYTHON_DIR=$${PYTHON_DIR}/
 }
 
-message(Using Python version $${PYTHON_VERSION})
+PYTHON_VERSION_MAJOR=$$section(PYTHON_VERSION, ., 0, 0)
+PYTHON_VERSION_MINOR=$$section(PYTHON_VERSION, ., 1, 1)
 
-macx {
+!equals(PYTHON_VERSION, $${PYTHON_VERSION_MAJOR}.$${PYTHON_VERSION_MINOR}) {
+  error("Failed to parse PYTHON_VERSION:\"$$PYTHON_VERSION\"")
+} else {
+  message(Using Python version $${PYTHON_VERSION})
+}
+
+
+# Python 2.x has problems:
+# 1) https://wiki.gentoo.org/wiki/Project:Python/Strict_aliasing
+# 2) deprecated implicit cast of string literals to char*
+equals(PYTHON_VERSION_MAJOR, 2):gcc:QMAKE_CXXFLAGS *= -fno-strict-aliasing -Wno-error=write-strings
+contains(PKGCONFIG, "python.*"){
+  CONFIG += link_pkgconfig
+  PYTHON_PKGCONFIG = $$member($$unique($$find(PKGCONFIG, "python.*")), 1, 1)
+  # add rpath
+  PYTHON_LIBDIR = $$system($$pkgConfigExecutable() --libs-only-L $$PYTHON_PKGCONFIG)
+  QMAKE_RPATHDIR += $$replace(PYTHON_LIBDIR,-L,)
+} else:macx:isEmpty(PYTHON_DIR){
   # for macx you need to have the Python development kit installed as framework
   INCLUDEPATH += /System/Library/Frameworks/Python.framework/Headers
   LIBS += -F/System/Library/Frameworks -framework Python
@@ -52,15 +70,17 @@ macx {
   # make sure that you have installed a matching python-dev package.
 
   PYTHON_CONFIG = $${PYTHON_DIR}/bin/python$${PYTHON_VERSION}-config
-  system($${PYTHON_CONFIG} --embed --libs) {
-    unix:LIBS += $$system($${PYTHON_CONFIG} --embed --libs)
-  } else: unix:LIBS += $$system($${PYTHON_CONFIG} --libs)  
-  unix:QMAKE_CXXFLAGS += $$system($${PYTHON_CONFIG} --includes)
+  PYTHON_CONFIG_OPTIONS_LIBS = --libs
+  equals(PYTHON_VERSION_MAJOR, 3):!lessThan(PYTHON_VERSION_MINOR, 8) {
+    # Since 3.8 `--embed` is needed
+    PYTHON_CONFIG_OPTIONS_LIBS += --embed
+  }
+  LIBS += $$system($${PYTHON_CONFIG} $${PYTHON_CONFIG_OPTIONS_LIBS})
+  QMAKE_CXXFLAGS += $$system($${PYTHON_CONFIG} --includes)
   PYTHON_LFLAGS = $$system($${PYTHON_CONFIG} --ldflags)
-  unix:QMAKE_LFLAGS += $${PYTHON_LFLAGS}
+  QMAKE_LFLAGS += $${PYTHON_LFLAGS}
   # add rpath
   PYTHON_LIBDIR = $$find(PYTHON_LFLAGS,-L.*)
-  RPATH = -Wl,-rpath,
-  PYTHON_RPATH = $$replace(PYTHON_LIBDIR,-L,$${RPATH})
-  unix:QMAKE_LFLAGS += $${PYTHON_RPATH}
+  PYTHON_RPATH = $$replace(PYTHON_LIBDIR,-L,)
+  QMAKE_RPATHDIR += $$PYTHON_RPATH
 }

extensions/PythonQt_QtAll/PythonQt_QtAll.cpp

@@ -117,7 +117,5 @@ namespace PythonQt_QtAll
 #ifdef PYTHONQT_WITH_UITOOLS
     PythonQt_init_QtUiTools(0);
 #endif
-  };
-};
-
-
+  }
+}

extensions/PythonQt_QtAll/PythonQt_QtAll.h

@@ -47,6 +47,6 @@ namespace PythonQt_QtAll
 {
   //! initialize the Qt binding
   PYTHONQT_QTALL_EXPORT void init();
-};    
+}
 
 #endif

extensions/PythonQt_QtAll/PythonQt_QtAll.pro

@@ -1,19 +1,23 @@
 # get external pythonqtall config or enable all by default
 
+isEmpty( PYTHONQTALL_CONFIG ) {
+  PYTHONQTALL_CONFIG = $$(PYTHONQTALL_CONFIG)
+}
+
 isEmpty( PYTHONQTALL_CONFIG ) {
   message("using default PythonQt_QtAll Configuration")
   CONFIG += PythonQtCore
-  CONFIG += PythonQtGui
-  CONFIG += PythonQtSvg
-  CONFIG += PythonQtSql
-  CONFIG += PythonQtNetwork
-  CONFIG += PythonQtOpengl 
-  CONFIG += PythonQtXml
-  CONFIG += PythonQtXmlpatterns
-  CONFIG += PythonQtMultimedia
-  CONFIG += PythonQtQml
-  CONFIG += PythonQtQuick
-  CONFIG += PythonQtUiTools
+  qtHaveModule(gui):qtHaveModule(widgets):CONFIG += PythonQtGui
+  qtHaveModule(svg):CONFIG += PythonQtSvg
+  qtHaveModule(sql):CONFIG += PythonQtSql
+  qtHaveModule(network):CONFIG += PythonQtNetwork
+  qtHaveModule(opengl):CONFIG += PythonQtOpengl
+  qtHaveModule(xml):CONFIG += PythonQtXml
+  qtHaveModule(xmlpatterns):CONFIG += PythonQtXmlpatterns
+  qtHaveModule(multimedia):CONFIG += PythonQtMultimedia
+  qtHaveModule(qml):CONFIG += PythonQtQml
+  qtHaveModule(quick):CONFIG += PythonQtQuick
+  qtHaveModule(uitools):CONFIG += PythonQtUiTools
 
   qtHaveModule(webkit):CONFIG += PythonQtWebKit
 } else {
@@ -36,10 +40,10 @@ CONFIG += dll qt
 DEFINES += PYTHONQT_QTALL_EXPORTS
 
 HEADERS +=                \
-  PythonQt_QtAll.h
+  $$PWD/PythonQt_QtAll.h
 
 SOURCES +=                \
-  PythonQt_QtAll.cpp
+  $$PWD/PythonQt_QtAll.cpp
 
 unix {
   CONFIG += create_pc create_prl no_install_prl
@@ -60,79 +64,81 @@ headers.path = /include
 
 INSTALLS += target headers
 
+defineTest(Xinclude) {
+  f=$$PYTHONQT_GENERATED_PATH/$$1/$${1}.pri
+  exists($$f):include($$f):export(HEADERS):export(SOURCES):export(DEFINES)
+
+}
+
+
 PythonQtCore {
   DEFINES += PYTHONQT_WITH_CORE
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_core/com_trolltech_qt_core.pri)
+  Xinclude (com_trolltech_qt_core)
 }
 
 PythonQtGui  {
   DEFINES += PYTHONQT_WITH_GUI
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_gui/com_trolltech_qt_gui.pri)
+  Xinclude (com_trolltech_qt_gui)
   QT += gui widgets printsupport
 }
 
 PythonQtSvg {
   DEFINES += PYTHONQT_WITH_SVG
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_svg/com_trolltech_qt_svg.pri)
+  Xinclude (com_trolltech_qt_svg)
   QT +=svg
 }
 
 PythonQtSql {
   DEFINES += PYTHONQT_WITH_SQL
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_sql/com_trolltech_qt_sql.pri)
+  Xinclude (com_trolltech_qt_sql)
   QT += sql
 }
 
 PythonQtNetwork {
   DEFINES += PYTHONQT_WITH_NETWORK
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_network/com_trolltech_qt_network.pri)
+  Xinclude (com_trolltech_qt_network)
   QT += network
 }
 
 PythonQtOpengl {
   DEFINES += PYTHONQT_WITH_OPENGL
-  PythonQtCore: include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_opengl/com_trolltech_qt_opengl.pri)
   QT += opengl
-}
-
-PythonQtXml {
-  DEFINES += PYTHONQT_WITH_XML
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_xml/com_trolltech_qt_xml.pri)
+  PythonQtCore: Xinclude (com_trolltech_qt_opengl)
   QT += xml
 }
 
 PythonQtXmlpatterns {
   DEFINES += PYTHONQT_WITH_XMLPATTERNS
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_xmlpatterns/com_trolltech_qt_xmlpatterns.pri)
+  Xinclude (com_trolltech_qt_xmlpatterns)
   QT += xmlpatterns
 }
 
 PythonQtMultimedia {
   DEFINES += PYTHONQT_WITH_MULTIMEDIA
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_multimedia/com_trolltech_qt_multimedia.pri)
- QT += multimedia multimediawidgets
+  Xinclude (com_trolltech_qt_multimedia)
+  QT += multimedia multimediawidgets
 }
 
 PythonQtQml {
   DEFINES += PYTHONQT_WITH_QML
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_qml/com_trolltech_qt_qml.pri)
+  Xinclude (com_trolltech_qt_qml)
   QT += qml
 }
 
 PythonQtQuick {
   DEFINES += PYTHONQT_WITH_QUICK
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_quick/com_trolltech_qt_quick.pri)
+  Xinclude (com_trolltech_qt_quick)
   QT += quick quickwidgets
 }
 
 PythonQtUiTools {
   DEFINES += PYTHONQT_WITH_UITOOLS
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_uitools/com_trolltech_qt_uitools.pri)
+  Xinclude (com_trolltech_qt_uitools)
   QT += uitools
 }
 
 PythonQtWebKit {
   DEFINES += PYTHONQT_WITH_WEBKIT
-  include ($$PYTHONQT_GENERATED_PATH/com_trolltech_qt_webkit/com_trolltech_qt_webkit.pri)
+  Xinclude (com_trolltech_qt_webkit)
   QT += webkit webkitwidgets
 }

generator/abstractmetabuilder.cpp

@@ -746,6 +746,7 @@ int AbstractMetaBuilder::figureOutEnumValue(const QString &stringValue,
                                         AbstractMetaEnum *meta_enum,
                                         AbstractMetaFunction *meta_function)
 {
+    Q_UNUSED(meta_function)
     if (stringValue.isEmpty())
         return oldValuevalue;
 
@@ -1619,12 +1620,15 @@ AbstractMetaFunction *AbstractMetaBuilder::traverseFunction(FunctionModelItem fu
 
     // If we where not able to translate the default argument make it
     // reset all default arguments before this one too.
-    for (int i=0; i<first_default_argument; ++i)
+    for (int i=0; i<first_default_argument; ++i) {
         meta_arguments[i]->setDefaultValueExpression(QString());
+    }
 
-    if (ReportHandler::debugLevel() == ReportHandler::FullDebug)
-        foreach(AbstractMetaArgument *arg, meta_arguments)
+    if (ReportHandler::debugLevel() == ReportHandler::FullDebug) {
+        foreach(AbstractMetaArgument *arg, meta_arguments) {
             ReportHandler::debugFull("   - " + arg->toString());
+        }
+    }
 
     return meta_function;
 }
@@ -1944,6 +1948,7 @@ QString AbstractMetaBuilder::translateDefaultValue(ArgumentModelItem item, Abstr
                                                AbstractMetaFunction *fnc, AbstractMetaClass *implementing_class,
                                                int argument_index)
 {
+    Q_UNUSED(type)
     QString function_name = fnc->name();
     QString class_name = implementing_class->name();
 

generator/abstractmetalang.cpp

@@ -1205,13 +1205,13 @@ AbstractMetaField *AbstractMetaField::copy() const
 
     return returned;
 }
-
+/* UNUSED
 static QString upCaseFirst(const QString &str) {
     Q_ASSERT(!str.isEmpty());
     QString s = str;
     s[0] = s.at(0).toUpper();
     return s;
-}
+} */
 
 static AbstractMetaFunction *createXetter(const AbstractMetaField *g, const QString &name, uint type) {
     AbstractMetaFunction *f = new AbstractMetaFunction;

generator/generator.h

@@ -54,7 +54,7 @@ class Generator : public QObject
 {
     Q_OBJECT
 
-    Q_PROPERTY(QString outputDirectory READ outputDirectory WRITE setOutputDirectory);
+    Q_PROPERTY(QString outputDirectory READ outputDirectory WRITE setOutputDirectory)
 
 public:
     enum Option {

generator/generator.pri

@@ -2,15 +2,15 @@ isEmpty(GENERATORPATH):GENERATORPATH = $$PWD
 INCLUDEPATH += $$GENERATORPATH
 
 TEMPLATE = app
+#CONFIG += cmdline -- does not work as expected with old Qt versions, f.e. is missing in 5.9
+CONFIG += console
+CONFIG -= app_bundle
+
 TARGET +=
 DEPENDPATH += $$GENERATORPATH tests parser
-mac:CONFIG -= app_bundle
 INCLUDEPATH += $$GENERATORPATH/.
 INCLUDEPATH += $$GENERATORPATH/../common
 
-unix:CONFIG += debug_and_release
-
-CONFIG += console
 RESOURCES += generator.qrc
 
 include($$GENERATORPATH/parser/rxx.pri)
@@ -21,6 +21,8 @@ win32-msvc2005:{
         QMAKE_CXXFLAGS += -wd4996
         QMAKE_CFLAGS += -wd4996
 }
+gcc:QMAKE_CXXFLAGS += -Wno-deprecated-declarations -Wpedantic
+clang: QMAKE_CXXFLAGS += -Wno-nested-anon-types -Wno-gnu-anonymous-struct -Wno-unused-private-field
 
 # Input
 HEADERS += \
@@ -58,7 +60,7 @@ SOURCES += \
 
 
 
-QT = core xml
+QT += core xml
 
 win32-msvc.net {
         QMAKE_CXXFLAGS += /Zm500