[PATCH 1/2] selftests/lib.mk: handle both LLVM=1 and CC=clang builds

[John Hubbard <jhubbard@nvidia.com>]

The kselftests may be built in a couple different ways:
    make LLVM=1
    make CC=clang

In order to handle both cases, set LLVM=1 if CC=clang. That way,the rest
of lib.mk, and any Makefiles that include lib.mk, can base decisions
solely on whether or not LLVM is set.

Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>

Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 tools/testing/selftests/lib.mk | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 429535816dbd..2902787b89b2 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -1,5 +1,17 @@
 # This mimics the top-level Makefile. We do it explicitly here so that this
 # Makefile can operate with or without the kbuild infrastructure.
+
+# The kselftests may be built in a couple different ways:
+#     make LLVM=1
+#     make CC=clang
+#
+# In order to handle both cases, set LLVM=1 if CC=clang. That way,the rest of
+# lib.mk, and any Makefiles that include lib.mk, can base decisions solely on
+# whether or not LLVM is set.
+ifeq ($(CC),clang)
+    LLVM := 1
+endif
+
 ifneq ($(LLVM),)
 ifneq ($(filter %/,$(LLVM)),)
 LLVM_PREFIX := $(LLVM)
-- 
2.45.1