Clang: Check for required mininum LLVM/Clang version

...otherwise, if the compilation fails, the user is left without any
hint.

Change-Id: I753aefac0c9fbd24b148235e792fe3b3a2aea21b
Reviewed-by: Marco Bubke <marco.bubke@theqtcompany.com>
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>

1 files changed, 14 insertions, 3 deletions

diff --git a/qbs/imports/QtcClangInstallation/functions.js b/qbs/imports/QtcClangInstallation/functions.js
index d2b9736f3b1..f00b109a63c 100644
--- a/qbs/imports/QtcClangInstallation/functions.js
+++ b/qbs/imports/QtcClangInstallation/functions.js
@@ -1,6 +1,17 @@
 var File = loadExtension("qbs.File")
+var MinimumLLVMVersion = "3.6.0"
 
-function llvmConfig(qbs)
+function isSuitableLLVMConfig(llvmConfigCandidate, qtcFunctions, processOutputReader)
+{
+    if (File.exists(llvmConfigCandidate)) {
+        var candidateVersion = version(llvmConfigCandidate, processOutputReader);
+        if (candidateVersion && candidateVersion.length)
+            return qtcFunctions.versionIsAtLeast(candidateVersion, MinimumLLVMVersion)
+    }
+    return false;
+}
+
+function llvmConfig(qbs, qtcFunctions, processOutputReader)
 {
     var llvmInstallDirFromEnv = qbs.getEnv("LLVM_INSTALL_DIR")
     var llvmConfigVariants = [
@@ -12,7 +23,7 @@ function llvmConfig(qbs)
     if (llvmInstallDirFromEnv) {
         for (var i = 0; i < llvmConfigVariants.length; ++i) {
             var variant = llvmInstallDirFromEnv + "/bin/" + llvmConfigVariants[i];
-            if (File.exists(variant))
+            if (isSuitableLLVMConfig(variant, qtcFunctions, processOutputReader))
                 return variant;
         }
     }
@@ -24,7 +35,7 @@ function llvmConfig(qbs)
     for (var i = 0; i < llvmConfigVariants.length; ++i) {
         for (var j = 0; j < pathList.length; ++j) {
             var variant = pathList[j] + "/" + llvmConfigVariants[i];
-            if (File.exists(variant))
+            if (isSuitableLLVMConfig(variant, qtcFunctions, processOutputReader))
                 return variant;
         }
     }