Use CMake facility for verbose makefiles instead of an env var.

It should also have an effect for Visual Studio project files, not
just makefile generators.

Change-Id: I395071f09b29a6e8967a3d44e41d30480ae783f7
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

mkspecs/features/ctest_testcase.prf

@@ -53,9 +53,6 @@ isEmpty(CMAKE_VERSION) {
             dependentmodules -= $$CMAKE_QT_MODULES_UNDER_TEST
             dependentmodules = $$cmakeModuleList($$dependentmodules)
 
-            SET = set
-            equals(QMAKE_DIR_SEP, "/"):SET = export
-
             CMAKE_MODULE_VERSIONS =
             CMAKE_MODULES_UNDER_TEST =
             for (MODULE_UNDER_TEST, CMAKE_QT_MODULES_UNDER_TEST) {
@@ -69,8 +66,9 @@ isEmpty(CMAKE_VERSION) {
             CMAKE_MODULES_UNDER_TEST = $$join(CMAKE_MODULES_UNDER_TEST, ;)
 
             check.commands = \
-                $(MKDIR) $$BUILD_DIR && cd $$BUILD_DIR && $$SET VERBOSE=1 && \
+                $(MKDIR) $$BUILD_DIR && cd $$BUILD_DIR && \
                 cmake $$_PRO_FILE_PWD_ $$CMAKE_GENERATOR \
+                    -DCMAKE_VERBOSE_MAKEFILE=1 \
                     $$CMAKE_MODULE_DEFINES \
                     -DCMAKE_BUILD_TYPE=$${CMAKE_BUILD_TYPE} \
                     -DCMAKE_PREFIX_PATH=$$CMAKE_PREFIX_PATH \

src/corelib/Qt5CTestMacros.cmake

@@ -19,6 +19,10 @@ if (CMAKE_TOOLCHAIN_FILE)
   list(APPEND BUILD_OPTIONS_LIST "-DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}")
 endif()
 
+if (CMAKE_VERBOSE_MAKEFILE)
+  list(APPEND BUILD_OPTIONS_LIST "-DCMAKE_VERBOSE_MAKEFILE=1")
+endif()
+
 if (NO_WIDGETS)
   list(APPEND BUILD_OPTIONS_LIST "-DNO_WIDGETS=True")
 endif()