test versions

Author: xiazhvera

builder/core/data.py

@@ -508,10 +508,8 @@ class PKG_TOOLS(Enum):
             '3': {
                 'c': "clang-3.9",
                 'cxx': "clang++-3.9",
-            },
-            '3.9': {
-                'c': "clang-3.9",
-                'cxx': "clang++-3.9",
+                # specific version number in use
+                'releases': ['3.9']
             },
             '6': {
                 'c': "clang-6.0",

builder/core/toolchain.py

@@ -57,9 +57,15 @@ def _find_compiler_tool(name, versions):
     return None, None
 
 
-def _clang_versions():
-    versions = [v for v in COMPILERS['clang']
-                ['versions'].keys() if v != 'default']
+def _clang_versions(version=None):
+    versions = []
+    if version:
+        versions = [version]
+        versions.append(COMPILERS['clang']['versions']
+                        [version]['releases'])
+    else:
+        versions = [v for v in COMPILERS['clang']
+                    ['versions'].keys() if v != 'default']
     versions.sort()
     versions.reverse()
     print("DEBUG_CLANG: versions {}".format(versions))
@@ -191,7 +197,7 @@ def find_gcc_tool(name, version=None):
     def find_llvm_tool(name, version=None):
         """ Finds clang, clang-tidy, lld, etc at a specific version, or the
         latest one available """
-        versions = [version] if version else _clang_versions()
+        versions = _clang_versions()
         return _find_compiler_tool(name, versions)
 
     @staticmethod