SCons: add `methods.using_clang` to check used compiler

Also rename `use_gcc` to `using_gcc` to make it clear that it returns
a config but does not alter it.

1 files changed, 4 insertions, 1 deletions

diff --git a/methods.py b/methods.py
index 7465962187..5bc30dc643 100644
--- a/methods.py
+++ b/methods.py
@@ -668,5 +668,8 @@ def get_compiler_version(env):
     else:
         return None
 
-def use_gcc(env):
+def using_gcc(env):
     return 'gcc' in os.path.basename(env["CC"])
+
+def using_clang(env):
+    return 'clang' in os.path.basename(env["CC"])