GCC: Make it possible to force the linker variant

...via cpp.linkerVariant.

[ChangeLog] Added new cpp property linkerVariant to force use of gold,
bfd or lld.

Task-number: QBS-1421
Change-Id: I98f9d2581515ac8e9c984a2f8d70f4a7a3ab230b
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

4 files changed, 51 insertions, 0 deletions

diff --git a/tests/auto/blackbox/testdata/linker-variant/linker-variant.qbs b/tests/auto/blackbox/testdata/linker-variant/linker-variant.qbs
new file mode 100644
index 000000000..57bd4ccba
--- /dev/null
+++ b/tests/auto/blackbox/testdata/linker-variant/linker-variant.qbs
@@ -0,0 +1,20 @@
+CppApplication {
+    name: "p"
+    property string linkerVariant
+    Probe {
+        id: gccProbe
+        property bool isGcc: qbs.toolchain.contains("gcc")
+        configure: {
+            console.info("is GCC: " + isGcc);
+            if (isGcc)
+                found = true;
+        }
+    }
+
+    Properties {
+        condition: gccProbe.found
+        cpp.linkerVariant: linkerVariant
+    }
+
+    files: "main.cpp"
+}
diff --git a/tests/auto/blackbox/testdata/linker-variant/main.cpp b/tests/auto/blackbox/testdata/linker-variant/main.cpp
new file mode 100644
index 000000000..237c8ce18
--- /dev/null
+++ b/tests/auto/blackbox/testdata/linker-variant/main.cpp
@@ -0,0 +1 @@
+int main() {}
diff --git a/tests/auto/blackbox/tst_blackbox.cpp b/tests/auto/blackbox/tst_blackbox.cpp
index 50a3bb9c5..d1cd1d503 100644
--- a/tests/auto/blackbox/tst_blackbox.cpp
+++ b/tests/auto/blackbox/tst_blackbox.cpp
@@ -4245,6 +4245,34 @@ void TestBlackbox::linkerMode()
         testCondition(lang, [](const QByteArray &lddOutput) { return lddOutput.contains("objc"); });
 }
 
+void TestBlackbox::linkerVariant_data()
+{
+    QTest::addColumn<QString>("theType");
+    QTest::newRow("default") << QString();
+    QTest::newRow("bfd") << QString("bfd");
+    QTest::newRow("gold") << QString("gold");
+}
+
+void TestBlackbox::linkerVariant()
+{
+    QDir::setCurrent(testDataDir + "/linker-variant");
+    QFETCH(QString, theType);
+    QStringList resolveArgs("--force-probe-execution");
+    if (!theType.isEmpty())
+        resolveArgs << ("products.p.linkerVariant:" + theType);
+    QCOMPARE(runQbs(QbsRunParameters("resolve", resolveArgs)), 0);
+    const bool isGcc = m_qbsStdout.contains("is GCC: true");
+    const bool isNotGcc = m_qbsStdout.contains("is GCC: false");
+    QVERIFY2(isGcc != isNotGcc, m_qbsStdout.constData());
+    QbsRunParameters buildParams("build", QStringList{"--command-echo-mode", "command-line"});
+    buildParams.expectFailure = true;
+    runQbs(buildParams);
+    if (isGcc && !theType.isEmpty())
+        QCOMPARE(m_qbsStdout.count("-fuse-ld=" + theType.toLocal8Bit()), 1);
+    else
+        QVERIFY2(!m_qbsStdout.contains("-fuse-ld"), m_qbsStdout.constData());
+}
+
 void TestBlackbox::lexyacc()
 {
     if (!lexYaccExist())
diff --git a/tests/auto/blackbox/tst_blackbox.h b/tests/auto/blackbox/tst_blackbox.h
index 874690ad2..9a715e721 100644
--- a/tests/auto/blackbox/tst_blackbox.h
+++ b/tests/auto/blackbox/tst_blackbox.h
@@ -160,6 +160,8 @@ private slots:
     void jsExtensionsBinaryFile();
     void ld();
     void linkerMode();
+    void linkerVariant_data();
+    void linkerVariant();
     void lexyacc();
     void lexyaccOutputs();
     void lexyaccOutputs_data();