C++: Add support for clang on Windows

This is about clang in "mingw mode", not clang-cl.
When targeting Windows, clang is a lot like mingw, so factor out the
common parts into a new base module.
Testing uncovered a number of invalid assumptions in our autotests,
which are also fixed in this patch. In addition, minor adjustments had
to be made to the Qt.core module and to the qbscore lib.

Change-Id: I73085dc62a65e2a9d0397cf234c8641989246f22
Reviewed-by: Ivan Komissarov <ABBAPOH@gmail.com>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>

4 files changed, 30 insertions, 7 deletions

diff --git a/tests/auto/api/testdata/infinite-loop-process/infinite-loop.qbs b/tests/auto/api/testdata/infinite-loop-process/infinite-loop.qbs
index f0de12df1..f4ea8bf83 100644
--- a/tests/auto/api/testdata/infinite-loop-process/infinite-loop.qbs
+++ b/tests/auto/api/testdata/infinite-loop-process/infinite-loop.qbs
@@ -4,12 +4,21 @@ Project {
         consoleApplication: true // suppress bundle generation
         files: "main.cpp"
         name: "infinite-loop"
+        cpp.cxxLanguageVersion: "c++11"
+        Properties {
+            condition: qbs.toolchain.contains("gcc")
+            cpp.driverFlags: "-pthread"
+        }
     }
 
     Product {
         type: "mytype"
         name: "caller"
         Depends { name: "infinite-loop" }
+        Depends {
+            name: "cpp" // Make sure build environment is set up properly.
+            condition: qbs.hostOS.contains("windows") && qbs.toolchain.contains("gcc")
+        }
         Rule {
             inputsFromDependencies: "application"
             outputFileTags: "mytype"
diff --git a/tests/auto/api/testdata/link-staticlibs-dynamiclibs/link-staticlibs-dynamiclibs.qbs b/tests/auto/api/testdata/link-staticlibs-dynamiclibs/link-staticlibs-dynamiclibs.qbs
index eade97126..d7ed6c862 100644
--- a/tests/auto/api/testdata/link-staticlibs-dynamiclibs/link-staticlibs-dynamiclibs.qbs
+++ b/tests/auto/api/testdata/link-staticlibs-dynamiclibs/link-staticlibs-dynamiclibs.qbs
@@ -11,6 +11,13 @@ Project {
         files: [ "static1.cpp" ]
         Depends { name: "cpp" }
         Depends { name: "dynamic1" }
+
+        Probe {
+            id: osCheck
+            property bool isNormalUnix: qbs.targetOS.contains("unix")
+                                        && !qbs.targetOS.contains("darwin")
+            configure: { console.info("is normal unix: " + (isNormalUnix ? "yes" : "no")); }
+        }
     }
 
     DynamicLibrary {
diff --git a/tests/auto/api/testdata/timeout-process/timeout.qbs b/tests/auto/api/testdata/timeout-process/timeout.qbs
index 3f79dce96..bdf6833fd 100644
--- a/tests/auto/api/testdata/timeout-process/timeout.qbs
+++ b/tests/auto/api/testdata/timeout-process/timeout.qbs
@@ -5,12 +5,20 @@ Project {
         files: "main.cpp"
         name: "infinite-loop"
         cpp.cxxLanguageVersion: "c++11"
+        Properties {
+            condition: qbs.toolchain.contains("gcc")
+            cpp.driverFlags: "-pthread"
+        }
     }
 
     Product {
         type: "product-under-test"
         name: "caller"
         Depends { name: "infinite-loop" }
+        Depends {
+            name: "cpp" // Make sure build environment is set up properly.
+            condition: qbs.hostOS.contains("windows") && qbs.toolchain.contains("gcc")
+        }
         Rule {
             inputsFromDependencies: "application"
             outputFileTags: "product-under-test"
diff --git a/tests/auto/api/tst_api.cpp b/tests/auto/api/tst_api.cpp
index 1a98f5f21..36a98fdaa 100644
--- a/tests/auto/api/tst_api.cpp
+++ b/tests/auto/api/tst_api.cpp
@@ -1556,9 +1556,13 @@ void TestApi::linkStaticAndDynamicLibs()
     BuildDescriptionReceiver bdr;
     qbs::BuildOptions options;
     options.setEchoMode(qbs::CommandEchoModeCommandLine);
+    m_logSink->output.clear();
     const qbs::ErrorInfo errorInfo = doBuildProject("link-staticlibs-dynamiclibs", &bdr, nullptr,
                                                     nullptr, options);
     VERIFY_NO_ERROR(errorInfo);
+    const bool isNormalUnix = m_logSink->output.contains("is normal unix: yes");
+    const bool isNotNormalUnix = m_logSink->output.contains("is normal unix: no");
+    QVERIFY2(isNormalUnix != isNotNormalUnix, qPrintable(m_logSink->output));
 
     // The dependencies libdynamic1.so and libstatic2.a must not appear in the link command for the
     // executable. The -rpath-link line for libdynamic1.so must be there.
@@ -1575,12 +1579,7 @@ void TestApi::linkStaticAndDynamicLibs()
             }
         }
         QVERIFY(!appLinkCmd.isEmpty());
-        std::string targetPlatform = buildProfile.value("qbs.targetPlatform")
-                .toString().toStdString();
-        std::vector<std::string> targetOS = qbs::Internal::HostOsInfo::canonicalOSIdentifiers(
-                    targetPlatform);
-        if (!qbs::Internal::contains(targetOS, "darwin")
-                && !qbs::Internal::contains(targetOS, "windows")) {
+        if (isNormalUnix) {
             const std::regex rpathLinkRex("-rpath-link=\\S*/"
                                           + relativeProductBuildDir("dynamic2").toStdString());
             const auto ln = appLinkCmd.toStdString();
@@ -2861,7 +2860,7 @@ void TestApi::timeout()
     QVERIFY(waitForFinished(buildJob.get(), testTimeoutInMsecs()));
     QVERIFY(buildJob->error().hasError());
     const auto errorString = buildJob->error().toString();
-    QVERIFY(errorString.contains("cancel"));
+    QVERIFY2(errorString.contains("cancel"), qPrintable(errorString));
     QVERIFY(errorString.contains("timeout"));
 }