Exclude tst_selftests when feature process is disabled

- It should not be built for systems without process feature.

Task-number: QTBUG-99123
Pick-to: 6.2 6.3
Change-Id: I71caa59c2168435894c7d1afcc8226e44178439f
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

tests/auto/testlib/CMakeLists.txt

@@ -4,7 +4,7 @@
 # add_subdirectory(outformat) # special case missing project
 add_subdirectory(qsignalspy)
 # QTBUG-88507 # special case
-if(NOT ANDROID)
+if(QT_FEATURE_process AND NOT ANDROID)
     add_subdirectory(selftests)
 endif()
 if(TARGET Qt::Widgets)

tests/auto/testlib/selftests/tst_selftests.cpp

@@ -29,7 +29,7 @@
 
 #include <QtCore/QCoreApplication>
 
-#if QT_CONFIG(process)
+QT_REQUIRE_CONFIG(process);
 
 #if QT_CONFIG(temporaryfile)
 #  define USE_DIFF
@@ -1216,15 +1216,10 @@ SCENARIO("Test output of the loggers is as expected")
     }
 }
 
-#endif // QT_CONFIG(process)
-
 // ----------------------- Entrypoint -----------------------
 
 int main(int argc, char **argv)
 {
-#if !QT_CONFIG(process)
-    return 0;
-#else
     std::vector<const char*> args(argv, argv + argc);
 
     static auto kRebaseArgument = "--rebase";
@@ -1272,6 +1267,5 @@ int main(int argc, char **argv)
     }
 
     return result;
-#endif
 }