qbs build: Make use of cpp.cxxLanguageVersion.

Change-Id: Ia2f1870ec67ced58ad95bc6e1953575df2b88cd8
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

qbs/imports/QtcFunctions/functions.js

@@ -22,25 +22,3 @@ function versionIsAtLeast(actualVersion, expectedVersion)
     }
     return i === expectedVersionParts.length || expectedVersionParts[i] === 0;
 }
-
-function commonCxxFlags(qbs)
-{
-    var flags = [];
-    if (qbs.toolchain.contains("clang")) {
-        flags.push("-std=c++11");
-        if (qbs.targetOS.contains("darwin"))
-            flags.push("-stdlib=libc++");
-    } else if (qbs.toolchain.contains("gcc")) {
-        flags.push("-std=c++0x");
-    }
-    return flags;
-}
-
-function commonLinkerFlags(qbs)
-{
-    var flags = [];
-    if (qbs.toolchain.contains("clang") && qbs.targetOS.contains("darwin"))
-        flags.push("-stdlib=libc++");
-    return flags;
-}
-

qbs/imports/QtcProduct.qbs

@@ -6,9 +6,9 @@ Product {
 
     Depends { name: "cpp" }
     cpp.defines: project.generalDefines
-    cpp.cxxFlags: QtcFunctions.commonCxxFlags(qbs)
+    cpp.cxxLanguageVersion: "c++11"
     cpp.linkerFlags: {
-        var flags = QtcFunctions.commonLinkerFlags(qbs);
+        var flags = [];
         if (qbs.buildVariant == "release" && (qbs.toolchain.contains("gcc") || qbs.toolchain.contains("mingw")))
             flags.push("-Wl,-s");
         return flags;