From 2f0025675fe51a353e308c38fc7ee0ad75151ef2 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Tue, 7 Aug 2018 16:09:56 -0700 Subject: MIPS: VDSO: Force link endianness When building the VDSO with clang it appears to invoke ld without specifying endianness, even though clang itself was provided with a -EB or -EL flag. This results in the build failing due to a mismatch between the objects that are the input to ld, and the output it is attempting to create: VDSO arch/mips/vdso/vdso.so.dbg.raw mips-linux-ld: arch/mips/vdso/elf.o: compiled for a big endian system and target is little endian mips-linux-ld: arch/mips/vdso/elf.o: endianness incompatible with that of the selected emulation mips-linux-ld: failed to merge target specific data of file arch/mips/vdso/elf.o ... Work around this problem by explicitly specifying the link endianness using -Wl,-EB or -Wl,-EL when -EB or -EL are part of KBUILD_CFLAGS. This resolves the build failure when using clang, and doesn't have any negative effect on gcc. Signed-off-by: Paul Burton --- arch/mips/vdso/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/mips/vdso/Makefile') diff --git a/arch/mips/vdso/Makefile b/arch/mips/vdso/Makefile index bd79b27faa2b..34605ca21498 100644 --- a/arch/mips/vdso/Makefile +++ b/arch/mips/vdso/Makefile @@ -44,6 +44,7 @@ endif # VDSO linker flags. VDSO_LDFLAGS := \ -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 \ + $(addprefix -Wl$(comma),$(filter -E%,$(KBUILD_CFLAGS))) \ -nostdlib -shared \ $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \ $(call cc-ldoption, -Wl$(comma)--build-id) -- cgit