Dear Linux folks,
I just wanted to make you aware that building Linux for ppc64le with
clang/lld.ld fails with [1]:
ld.lld: error: can't create dynamic relocation R_PPC64_ADDR64
against symbol: empty_zero_page in readonly segment; recompile object
files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in
the output
>>> defined in arch/powerpc/kernel/head_64.o
>>> referenced by
arch/powerpc/kernel/head_64.o:(___ksymtab+empty_zero_page+0x0)
The patch below from one of the comments [2] fixes it.
--- i/arch/powerpc/Makefile
+++ w/arch/powerpc/Makefile
@@ -122,7 +122,7 @@ cflags-$(CONFIG_STACKPROTECTOR) +=
-mstack-protector-guard-reg=r2
endif
LDFLAGS_vmlinux-y := -Bstatic
-LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
+LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie -z notext
LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
Kind regards,
Paul
[1]: https://github.com/ClangBuiltLinux/linux/issues/811
[2]:
https://github.com/ClangBuiltLinux/linux/issues/811#issuecomment-568316320
