CMake: silence warning configuring examples

When configuring qtwebengine as its own module, Svg is not searched as
an optional component, leading to the warning in
examples/pdf/CMakeLists.txt always being printed even when QtSvg is
available.

Add Svg as an optional package in find_package and move the checks
into the individual examples so the warning will also appear when the
individual example is built.

Pick-to: 6.8 6.9
Change-Id: I387dfd70ae1abc1a70f28dbfe74ac45b75bdf387
Reviewed-by: Michal Klocek <[email protected]>

Author: moheim-qt

examples/pdf/CMakeLists.txt

@@ -3,6 +3,3 @@
 
 qt_internal_add_example(singlepage)
 qt_internal_add_example(multipage)
-if(NOT TARGET Qt::Svg)
-    message(WARNING "QtSvg is required as runtime dependency for qtpdfquick examples.")
-endif()

examples/pdf/multipage/CMakeLists.txt

@@ -12,7 +12,10 @@ endif()
 
 set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/pdf/multipage")
 
-find_package(Qt6 REQUIRED COMPONENTS Gui Qml)
+find_package(Qt6 REQUIRED COMPONENTS Gui Qml OPTIONAL_COMPONENTS Svg)
+if(NOT TARGET Qt::Svg)
+    message(WARNING "QtSvg is required as runtime dependency for qtpdfquick examples.")
+endif()
 
 qt_add_executable(multipage
     main.cpp

examples/pdf/singlepage/CMakeLists.txt

@@ -12,7 +12,10 @@ endif()
 
 set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/pdf/singlepage")
 
-find_package(Qt6 REQUIRED COMPONENTS Gui Qml)
+find_package(Qt6 REQUIRED COMPONENTS Gui Qml OPTIONAL_COMPONENTS Svg)
+if(NOT TARGET Qt::Svg)
+    message(WARNING "QtSvg is required as runtime dependency for qtpdfquick examples.")
+endif()
 
 qt_add_executable(pdfviewerquick
     main.cpp