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Subject[PATCH 2/3] MIPS: boot/compressed: Build without LTO
Date
We need a valid ELF object for dummy.o, so that objcopy can insert the
vmlinuz payload.

Therefore, we must build the decompresser program without LTO, otherwise
dummy.o will be LLVM bytecode instead of a ELF object file.

Building the decompresser with LTO wouldn't make much sense anyway,
unlike building the vmlinuz itself with LTO.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
arch/mips/boot/compressed/Makefile | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
index 4c9ecfbb0ef4..2d01c50fb0b1 100644
--- a/arch/mips/boot/compressed/Makefile
+++ b/arch/mips/boot/compressed/Makefile
@@ -27,6 +27,9 @@ ifdef CONFIG_CPU_LOONGSON64
KBUILD_CFLAGS := $(filter-out -march=loongson3a, $(KBUILD_CFLAGS)) -march=mips64r2
endif

+# Disable LTO
+KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS))
+
KBUILD_CFLAGS := $(KBUILD_CFLAGS) -mno-abicalls -D__KERNEL__ -D__DISABLE_EXPORTS \
-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"

--
2.33.0
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