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From: John Hubbard <jhubbard@nvidia.com>
To: Shuah Khan <shuah@kernel.org>,
	Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Beau Belgrave <beaub@linux.microsoft.com>,
	Steven Rostedt <rostedt@goodmis.org>,
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	sunliming <sunliming@kylinos.cn>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Valentin Obst <kernel@valentinobst.de>,
	linux-kselftest@vger.kernel.org,
	LKML <linux-kernel@vger.kernel.org>,
	llvm@lists.linux.dev,
	John Hubbard <jhubbard@nvidia.com>,
	Nathan Chancellor <nathan@kernel.org>,
	Ryan Roberts <ryan.roberts@arm.com>
Subject: [PATCH v2 1/2] selftests/lib.mk: handle both LLVM=1 and CC=clang builds
Date: Fri, 31 May 2024 11:37:50 -0700
Message-ID: <20240531183751.100541-2-jhubbard@nvidia.com>
In-Reply-To: <20240531183751.100541-1-jhubbard@nvidia.com>
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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>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.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