CMake 3.16 has pch support

CMakeLists.txt

@@ -165,7 +165,7 @@ find_package(KUserFeedback 1.0.0 CONFIG)
 set_package_properties(KUserFeedback PROPERTIES DESCRIPTION "User Feedback lib" TYPE OPTIONAL PURPOSE "Allow to send Telemetry Information (optional). It can be disable in apps.")
 
 option(USE_UNITY_CMAKE_SUPPORT "Use UNITY cmake support (speedup compile time)" FALSE)
-
+option(USE_PRECOMPILED_HEADERS "Use precompiled headers" ON) # Set to OFF when using clazy and such
 set(COMPILE_WITH_UNITY_CMAKE_SUPPORT false)
 if (USE_UNITY_CMAKE_SUPPORT)
     if(${CMAKE_VERSION} VERSION_LESS "3.16.0")
@@ -175,6 +175,23 @@ if (USE_UNITY_CMAKE_SUPPORT)
     endif()
 endif()
 
+option(USE_PRECOMPILED_HEADERS "Use precompiled headers" OFF) # Set to OFF when using clazy and such
+set(COMPILE_WITH_CMAKE_PCH_SUPPORT false)
+macro(pim_target_precompile_headers)
+    if (USE_PRECOMPILED_HEADERS)
+        if(${CMAKE_VERSION} VERSION_LESS "3.16.0")
+            message(STATUS "CMAKE version is less than 3.16.0 . We can't use cmake pch build support")
+        else()
+            set(COMPILE_WITH_CMAKE_PCH_SUPPORT true)
+        endif()
+
+        if (COMPILE_WITH_CMAKE_PCH_SUPPORT)
+            target_precompile_headers(${ARGV})
+        endif()
+    endif()
+endmacro()
+
+
 add_subdirectory(src)
 add_subdirectory(agents)
 add_subdirectory(ktnef)

agents/archivemailagent/CMakeLists.txt

@@ -25,6 +25,7 @@ ecm_qt_declare_logging_category(libarchivemailagent_SRCS HEADER archivemailagent
 ki18n_wrap_ui(libarchivemailagent_SRCS ui/archivemailwidget.ui )
 
 add_library(archivemailagent STATIC ${libarchivemailagent_SRCS})
+pim_target_precompile_headers(archivemailagent PUBLIC ../../kmail_pch.h)
 #if (COMPILE_WITH_UNITY_CMAKE_SUPPORT)
 #    set_target_properties(archivemailagent PROPERTIES UNITY_BUILD ON)
 #endif()

agents/followupreminderagent/CMakeLists.txt

@@ -33,6 +33,7 @@ qt5_add_dbus_interface(followupreminderagent_SRCS org.freedesktop.DBus.Propertie
 
 
 add_library(followupreminderagent STATIC ${followupreminderagent_SRCS})
+pim_target_precompile_headers(followupreminderagent PUBLIC ../../kmail_pch.h)
 #if (COMPILE_WITH_UNITY_CMAKE_SUPPORT)
 #    set_target_properties(followupreminderagent PROPERTIES UNITY_BUILD ON)
 #endif()

agents/sendlateragent/CMakeLists.txt

@@ -37,6 +37,7 @@ qt5_add_dbus_adaptor(sendlateragent_SRCS org.freedesktop.Akonadi.SendLaterAgent.
 ki18n_wrap_ui(libsendlateragent_SRCS ui/sendlaterconfigurewidget.ui)
 kconfig_add_kcfg_files(libsendlateragent_SRCS sendlateragentsettings.kcfgc)
 add_library(sendlateragent STATIC ${libsendlateragent_SRCS})
+pim_target_precompile_headers(sendlateragent PUBLIC ../../kmail_pch.h)
 #if (COMPILE_WITH_UNITY_CMAKE_SUPPORT)
 #    set_target_properties(sendlateragent PROPERTIES UNITY_BUILD ON)
 #endif()

kmail_pch.h

+#pragma once
+#include <QAbstractItemModel>
+#include <QAbstractItemView>
+#include <QAction>
+#include <QApplication>
+#include <QBuffer>
+#include <QButtonGroup>
+#include <QByteArray>
+#include <QCheckBox>
+#include <QClipboard>
+#include <QCloseEvent>
+#include <QColor>
+#include <QColorDialog>
+#include <QComboBox>
+#include <QCommandLineParser>
+#include <QContextMenuEvent>
+#include <QCoreApplication>
+#include <QCryptographicHash>
+#include <QCursor>
+#include <QDBusConnection>
+#include <QDBusConnectionInterface>
+#include <QDBusInterface>
+#include <QDBusMessage>
+#include <QDBusMetaType>
+#include <QDBusObjectPath>
+#include <QDBusPendingCallWatcher>
+#include <QDBusPendingReply>
+#include <QDBusReply>
+#include <QDBusServiceWatcher>
+#include <QDataStream>
+#include <QDate>
+#include <QDateTime>
+#include <QDebug>
+#include <QDialog>
+#include <QDialogButtonBox>
+#include <QDir>
+#include <QDrag>
+#include <QDragEnterEvent>
+#include <QDragLeaveEvent>
+#include <QDragMoveEvent>
+#include <QDropEvent>
+#include <QEvent>
+#include <QEventLoop>
+#include <QFile>
+#include <QFileDialog>
+#include <QFileInfo>
+#include <QFont>
+#include <QFontDatabase>
+#include <QFormLayout>
+#include <QGpgME/CryptoConfig>
+#include <QGpgME/ExportJob>
+#include <QGpgME/Job>
+#include <QGpgME/KeyForMailboxJob>
+#include <QGpgME/Protocol>
+#include <QGridLayout>
+#include <QGroupBox>
+#include <QHBoxLayout>
+#include <QHash>
+#include <QHeaderView>
+#include <QHideEvent>
+#include <QHostInfo>
+#include <QIcon>
+#include <QImage>
+#include <QImageReader>
+#include <QInputDialog>
+#include <QItemSelectionModel>
+#include <QKeyEvent>
+#include <QLabel>
+#include <QLayout>
+#include <QLineEdit>
+#include <QList>
+#include <QListView>
+#include <QListWidget>
+#include <QListWidgetItem>
+#include <QLocale>
+#include <QMap>
+#include <QMenu>
+#include <QMenuBar>
+#include <QMessageBox>
+#include <QMetaType>
+#include <QMimeData>
+#include <QMimeDatabase>
+#include <QMimeType>
+#include <QModelIndex>
+#include <QMouseEvent>
+#include <QNetworkConfigurationManager>
+#include <QObject>
+#include <QPainter>
+#include <QPainterPath>
+#include <QPalette>
+#include <QPixmap>
+#include <QPlainTextEdit>
+#include <QPointer>
+#include <QPolygon>
+#include <QProcess>
+#include <QProgressBar>
+#include <QProgressDialog>
+#include <QPushButton>
+#include <QQueue>
+#include <QRadioButton>
+#include <QRect>
+#include <QRegularExpression>
+#include <QRegularExpressionValidator>
+#include <QScrollArea>
+#include <QSessionManager>
+#include <QSet>
+#include <QSettings>
+#include <QSharedPointer>
+#include <QShortcut>
+#include <QShowEvent>
+#include <QSortFilterProxyModel>
+#include <QSpacerItem>
+#include <QSpinBox>
+#include <QSplitter>
+#include <QStackedWidget>
+#include <QStandardItem>
+#include <QStandardItemModel>
+#include <QStandardPaths>
+#include <QStatusBar>
+#include <QString>
+#include <QStringList>
+#include <QStyledItemDelegate>
+#include <QTabWidget>
+#include <QTemporaryDir>
+#include <QTemporaryFile>
+#include <QTextCodec>
+#include <QTextDocument>
+#include <QTextDocumentWriter>
+#include <QTimer>
+#include <QToolButton>
+#include <QTransform>
+#include <QTreeView>
+#include <QTreeWidget>
+#include <QTreeWidgetItem>
+#include <QUrl>
+#include <QVBoxLayout>
+#include <QVariant>
+#include <QVariantList>
+#include <QVector>
+#include <QWhatsThis>
+#include <QWidget>

src/CMakeLists.txt

@@ -317,6 +317,7 @@ endif()
 
 
 add_library(kmailprivate ${kmailprivate_LIB_SRCS})
+pim_target_precompile_headers(kmailprivate PUBLIC ../kmail_pch.h)
 if (COMPILE_WITH_UNITY_CMAKE_SUPPORT)
     set_target_properties(kmailprivate PROPERTIES UNITY_BUILD ON)
 endif()
@@ -374,6 +375,7 @@ set_target_properties(kmailprivate
 ########### kcm_kmail ###############
 set(kcm_kmail_PART_SRCS kcm_kmail.cpp )
 add_library(kcm_kmail MODULE ${kcm_kmail_PART_SRCS})
+pim_target_precompile_headers(kcm_kmail PUBLIC ../kmail_pch.h)
 target_link_libraries(kcm_kmail  kmailprivate KF5::KCMUtils KF5::Completion KF5::I18n KF5::TextWidgets)
 
 ########### kmailpart ###############
@@ -385,6 +387,7 @@ qt5_add_dbus_adaptor(kmailpart_PART_SRCS
     )
 qt5_add_dbus_interfaces(kmailpart_PART_SRCS ${kmail_BINARY_DIR}/src/org.kde.kmail.kmailpart.xml)
 add_library(kmailpart MODULE ${kmailpart_PART_SRCS})
+pim_target_precompile_headers(kmailpart PUBLIC ../kmail_pch.h)
 
 target_link_libraries(kmailpart
     kmailprivate

src/kontactplugin/kmail/CMakeLists.txt

@@ -15,6 +15,7 @@ qt5_add_dbus_interfaces(kontact_kmail_plugins_interface_SRCS ${kmail_BINARY_DIR}
 set(kontact_kmailplugin_PART_SRCS kmail_plugin.cpp summarywidget.cpp ${kontact_kmail_plugins_interface_SRCS} ${kontact_kmail_plugins_interface_common_SRCS})
 
 add_library(kontact_kmailplugin MODULE ${kontact_kmailplugin_PART_SRCS})
+pim_target_precompile_headers(kontact_kmailplugin PUBLIC ../../../kmail_pch.h)
 add_dependencies(kontact_kmailplugin kmail_xml)
 
 target_link_libraries(kontact_kmailplugin KF5::Mime  KF5::KontactInterface KF5::CalendarCore KF5::CalendarUtils KF5::AkonadiCore KF5::Contacts KF5::AkonadiWidgets)
@@ -24,6 +25,7 @@ target_link_libraries(kontact_kmailplugin KF5::Mime  KF5::KontactInterface KF5::
 set(kcm_kmailsummary_PART_SRCS kcmkmailsummary.cpp ${kontact_kmail_plugins_interface_SRCS} ${kontact_kmail_plugins_interface_common_SRCS})
 
 add_library(kcm_kmailsummary MODULE ${kcm_kmailsummary_PART_SRCS})
+pim_target_precompile_headers(kcm_kmailsummary PUBLIC ../../../kmail_pch.h)
 add_dependencies(kcm_kmailsummary kmail_xml)
 
 target_link_libraries(kcm_kmailsummary  KF5::Mime KF5::PimCommonAkonadi Qt5::DBus KF5::ConfigWidgets KF5::I18n)

src/kontactplugin/summary/CMakeLists.txt

@@ -6,6 +6,7 @@ set(kontact_summaryplugin_PART_SRCS summaryview_plugin.cpp summaryview_part.cpp
 qt5_add_dbus_interfaces(kontact_summaryplugin_PART_SRCS ${kmail_BINARY_DIR}/src/org.kde.kmail.kmail.xml)
 
 add_library(kontact_summaryplugin MODULE ${kontact_summaryplugin_PART_SRCS})
+pim_target_precompile_headers(kontact_summaryplugin PUBLIC ../../../kmail_pch.h)
 add_dependencies(kontact_summaryplugin kmail_xml)
 
 target_link_libraries(kontact_summaryplugin KF5::KCMUtils  KF5::IdentityManagement KF5::KontactInterface KF5::PimCommon KF5::ConfigCore)
@@ -17,6 +18,7 @@ kcoreaddons_desktop_to_json(kontact_summaryplugin summaryplugin.desktop)
 set(kcm_kontactsummary_PART_SRCS kcmkontactsummary.cpp)
 
 add_library(kcm_kontactsummary MODULE ${kcm_kontactsummary_PART_SRCS})
+pim_target_precompile_headers(kcm_kontactsummary PUBLIC ../../../kmail_pch.h)
 
 target_link_libraries(kcm_kontactsummary KF5::KCMUtils Qt5::Widgets KF5::KCMUtils KF5::I18n KF5::KontactInterface)