Fix Linux audio library detection

The configure checks where moved to QtMultimedia which we do not depend
on, therefore we need to now duplicate the checks ourselves.

Task-number: QTBUG-57620
Change-Id: I6f7319c7e91e3f51baf012c669121389cd6e1360
Reviewed-by: Michael Brüning <michael.bruning@qt.io>

configure.json

 {
     "module": "webengine",
 
+    "testDir": "tools/qmake/config.tests",
+
     "commandline": {
         "options": {
+            "alsa": "boolean",
             "proprietary-codecs": "boolean",
+            "pulseaudio": "boolean",
             "spellchecker": "boolean"
         }
     },
 
+    "libraries": {
+        "alsa": {
+            "label": "ALSA",
+            "test": "alsa",
+            "sources": [
+                "-lasound"
+            ]
+        },
+        "pulseaudio": {
+            "label": "PulseAudio >= 0.9.10",
+            "sources": [
+                { "type": "pkgConfig", "args": "libpulse >= 0.9.10 libpulse-mainloop-glib" }
+            ]
+        }
+    },
+
     "features": {
+        "alsa": {
+            "label": "ALSA",
+            "condition": "config.unix && libs.alsa",
+            "output": [ "privateFeature" ]
+        },
+        "pulseaudio": {
+            "label": "PulseAudio",
+            "autoDetect": "config.unix",
+            "condition": "libs.pulseaudio",
+            "output": [ "privateFeature" ]
+        },
         "proprietary-codecs": {
             "label": "Proprietary Codecs",
             "autoDetect": false,
@@ -27,7 +58,17 @@
             "section": "Qt WebEngine",
             "entries": [
                 "proprietary-codecs",
-                "spellchecker"
+                "spellchecker",
+                {
+                    "type": "feature",
+                    "args": "alsa",
+                    "condition": "config.unix"
+                },
+                {
+                    "type": "feature",
+                    "args": "pulseaudio",
+                    "condition": "config.unix"
+                }
             ]
         }
     ]

src/core/config/linux.pri

 include(common.pri)
-QT_FOR_CONFIG += gui-private
+include($$QTWEBENGINE_OUT_ROOT/qtwebengine-config.pri)
+QT_FOR_CONFIG += gui-private webengine-private
 
 # linux_use_bundled_gold currently relies on a hardcoded relative path from chromium/src/out/(Release|Debug)
 # Disable it along with the -Wl,--threads flag just in case gold isn't installed on the system.
@@ -41,12 +42,12 @@ qtConfig(system-png): GYP_CONFIG += use_system_libpng=1
 qtConfig(system-jpeg): GYP_CONFIG += use_system_libjpeg=1
 qtConfig(system-harfbuzz): use?(system_harfbuzz): GYP_CONFIG += use_system_harfbuzz=1
 !qtConfig(glib): GYP_CONFIG += use_glib=0
-contains(QT_CONFIG, pulseaudio) {
+qtConfig(pulseaudio) {
     GYP_CONFIG += use_pulseaudio=1
 } else {
     GYP_CONFIG += use_pulseaudio=0
 }
-contains(QT_CONFIG, alsa) {
+qtConfig(alsa) {
     GYP_CONFIG += use_alsa=1
 } else {
     GYP_CONFIG += use_alsa=0

tools/qmake/config.tests/alsa/alsa.pro

+SOURCES = alsatest.cpp
+

tools/qmake/config.tests/alsa/alsatest.cpp

+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <alsa/asoundlib.h>
+#if SND_LIB_VERSION < 0x1000a  // 1.0.10
+#error "Alsa version found too old, require >= 1.0.10"
+#endif
+
+int main(int argc,char **argv)
+{
+}
+

tools/qmake/mkspecs/features/configure.prf

@@ -20,13 +20,20 @@ defineTest(runConfigure) {
         qtCompileTest($$test)
     }
 
+    isQtMinimum(5, 8) {
+        include($$QTWEBENGINE_OUT_ROOT/qtwebengine-config.pri)
+        QT_FOR_CONFIG += webengine-private
+        qtConfig(proprietary-codecs): WEBENGINE_CONFIG += use_proprietary_codecs
+        qtConfig(spellchecker): WEBENGINE_CONFIG += use_spellchecker
+    }
+
     linux {
         QT_FOR_CONFIG += gui-private
         !config_khr:skipBuild("khronos development headers appear to be missing (mesa/libegl1-mesa-dev)")
 
         REQUIRED_PACKAGES = dbus-1 fontconfig
         !cross_compile: qtConfig(xcb): REQUIRED_PACKAGES += libdrm xcomposite xcursor xi xrandr xscrnsaver xtst
-        contains(QT_CONFIG, pulseaudio): REQUIRED_PACKAGES += libpulse
+        qtConfig(pulseaudio): REQUIRED_PACKAGES += libpulse
         qtConfig(system-png): REQUIRED_PACKAGES += libpng
         qtConfig(system-harfbuzz) {
              packagesExist("\'harfbuzz >= 1.2.0\'"): WEBENGINE_CONFIG += use_system_harfbuzz
@@ -81,12 +88,6 @@ defineTest(runConfigure) {
     !cross_compile {
         WEBENGINE_CONFIG += enable_pdf
     }
-    isQtMinimum(5, 8) {
-        include($$QTWEBENGINE_OUT_ROOT/qtwebengine-config.pri)
-        QT_FOR_CONFIG += webengine-private
-        qtConfig(proprietary-codecs): WEBENGINE_CONFIG += use_proprietary_codecs
-        qtConfig(spellchecker): WEBENGINE_CONFIG += use_spellchecker
-    }
 
     isEmpty(skipBuildReason): {
         cache(CONFIG, add, $$list(webengine_successfully_configured))