ANDROID: arm64: vdso: wrap -n in ld-option
ld.lld distributed in clang-r353983c AOSP LLVM release (the final AOSP
LLVM release for Android Q) did not support `-n` linker flag. It was
eventually added to clang-r360593.
Android OEM's may wish to still use ld.lld to link their kernels for Q.
This flag was disabled for Pixel 4 in go/pag/1258086. This patch is
equivalent, but rebased on upstream changes that removed cc-ldoption in
favor of ld-option.
For Android R, the final AOSP LLVM release, clang-r383902 has long
supported `-n` for ld.lld.
Change-Id: Iab41c9e1039e163113b428fc487a4a0708822faa
Bug: 63740206
Bug: 157279372
Link: https://github.com/ClangBuiltLinux/linux/issues/340
Link: https://bugs.llvm.org/show_bug.cgi?id=40542
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
index 01d6f49..b2c1695 100644
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -13,7 +13,7 @@
obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1 --hash-style=sysv \
- --build-id -n -T
+ --build-id $(call ld-option,-n) -T
ccflags-y += $(DISABLE_LTO)
# Disable gcov profiling for VDSO code
