FROMLIST: arm64: vdso32: Use full path to Clang instead of relying on PATH

Currently, in order to build the compat VDSO with Clang, this format
has to be used:

  PATH=${BIN_FOLDER}:${PATH} make CC=clang

Prior to the addition of this file, this format would also be
acceptable:

  make CC=${BIN_FOLDER}/clang

This is because the vdso32 Makefile uses cc-name instead of CC. After
this path, CC will still evaluate to clang for the first case as
expected but now the second case will use the specified Clang, rather
than the host's copy, which may not be compatible as shown below.

/usr/bin/as: unrecognized option '-mfloat-abi=soft'
clang-6.0: error: assembler command failed with exit code 1

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
(cherry picked from https://patchwork.kernel.org/patch/10419665)
Bug: 80184372
Change-Id: If90a5a4edbc2b5883b4c78161081ebeafbebdcde

diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index e9ca1f97a543b96a9537d2f3d488f9b1023d8c14..807d08e28c271e3d89cb361407f072aed17c9287 100644 (file)
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -5,7 +5,7 @@
 # A mix between the arm64 and arm vDSO Makefiles.
 
 ifeq ($(cc-name),clang)
-  CC_ARM32 := $(cc-name) $(CLANG_TARGET_ARM32) -no-integrated-as
+  CC_ARM32 := $(CC) $(CLANG_TARGET_ARM32) -no-integrated-as
   GCC_ARM32_TC := $(realpath $(dir $(shell which $(CROSS_COMPILE_ARM32)ld))/..)
 ifneq ($(GCC_ARM32_TC),)
   CC_ARM32 += --gcc-toolchain=$(GCC_ARM32_TC)