Don't require D-Bus on Android

Also, actually fully disable the build of okularpart, which isn't needed
on Android.

With this Okular can be built for Android without the D-Bus stub, at least
once KIO doesn't pull in D-Bus anymore.

CMakeLists.txt

@@ -54,7 +54,10 @@ ecm_setup_version(${PROJECT_VERSION}
                   VERSION_HEADER "${CMAKE_CURRENT_BINARY_DIR}/core/version.h"
                   PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/Okular5ConfigVersion.cmake")
 
-find_package(Qt5 ${QT_REQUIRED_VERSION} CONFIG REQUIRED COMPONENTS Core DBus Test Widgets PrintSupport Svg Qml Quick)
+find_package(Qt5 ${QT_REQUIRED_VERSION} CONFIG REQUIRED COMPONENTS Core Test Widgets PrintSupport Svg Qml Quick)
+if (BUILD_DESKTOP)
+    find_package(Qt5 ${QT_REQUIRED_VERSION} CONFIG REQUIRED COMPONENTS DBus)
+endif()
 find_package(Qt5 ${QT_REQUIRED_VERSION} OPTIONAL_COMPONENTS TextToSpeech)
 if (NOT Qt5TextToSpeech_FOUND)
     message(STATUS "Qt5TextToSpeech not found, speech features will be disabled")
@@ -422,7 +425,6 @@ if(BUILD_DESKTOP)
     part/signaturemodel.cpp
     part/signaturepanel.cpp
   )
-endif()
 
 if (Qt5TextToSpeech_FOUND)
    set(okularpart_SRCS ${okularpart_SRCS}
@@ -437,6 +439,7 @@ generate_export_header(okularpart BASE_NAME okularpart)
 target_link_libraries(okularpart okularcore
     ${MATH_LIB}
     Qt5::Svg
+    Qt5::DBus
     Phonon::phonon4qt5
     KF5::Archive
     KF5::Bookmarks
@@ -466,6 +469,7 @@ if (Qt5TextToSpeech_FOUND)
    target_link_libraries(okularpart Qt5::TextToSpeech)
 endif()
 install(TARGETS okularpart DESTINATION ${KDE_INSTALL_PLUGINDIR})
+endif()
 
 
 ########### install files ###############

generators/kimgio/CMakeLists.txt

@@ -6,7 +6,7 @@ add_definitions(-DTRANSLATION_DOMAIN="okular_kimgio")
 okular_add_generator(okularGenerator_kimgio generator_kimgio.cpp)
 target_link_libraries(okularGenerator_kimgio okularcore KF5::KExiv2 KF5::I18n)
 
-if(BUILD_TESTING)
+if(BUILD_TESTING AND BUILD_DESKTOP)
     add_definitions( -DKDESRCDIR="${CMAKE_CURRENT_SOURCE_DIR}/" )
     set( kimgiotest_SRCS tests/kimgiotest.cpp ${CMAKE_SOURCE_DIR}/part/pagepainter.cpp ${CMAKE_SOURCE_DIR}/part/guiutils.cpp ${CMAKE_SOURCE_DIR}/part/debug_ui.cpp )
     ecm_add_test(${kimgiotest_SRCS} TEST_NAME "kimgiotest" LINK_LIBRARIES okularcore okularpart Qt5::Svg Qt5::Test)

shell/CMakeLists.txt

@@ -18,7 +18,7 @@ ecm_add_app_icon(okular_SRCS ICONS ${ICONS_SRCS})
 
 add_executable(okular ${okular_SRCS})
 
-target_link_libraries(okular KF5::I18n KF5::Parts KF5::WindowSystem KF5::Crash)
+target_link_libraries(okular KF5::I18n KF5::Parts KF5::WindowSystem KF5::Crash Qt5::DBus)
 if(TARGET KF5::Activities)
     target_compile_definitions(okular PUBLIC -DWITH_KACTIVITIES=1)