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ANDROID: x86: add support for CONFIG_LTO_CLANG

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Bug: 133186739
Change-Id: I8e7a8976f9381233f28badc324145b9c4c7eacb0
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
This commit is contained in:
Sami Tolvanen
2019-04-10 14:17:20 -07:00
committed by Alistair Strachan
parent 3e1624332a
commit 0a90c27ba0
2 changed files with 6 additions and 0 deletions
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1
arch/x86/Kconfig
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@@ -78,6 +78,7 @@ config X86
select ARCH_SUPPORTS_ACPI
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_NUMA_BALANCING if X86_64
select ARCH_SUPPORTS_LTO_CLANG if X86_64
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USE_QUEUED_SPINLOCKS

5
arch/x86/Makefile
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@@ -214,6 +214,11 @@ ifdef CONFIG_X86_64
KBUILD_LDFLAGS += $(call ld-option, -z max-page-size=0x200000)
endif
ifdef CONFIG_LTO_CLANG
KBUILD_LDFLAGS += -plugin-opt=-code-model=kernel \
-plugin-opt=-stack-alignment=$(if $(CONFIG_X86_32),4,8)
endif
# Speed up the build
KBUILD_CFLAGS += -pipe
# Workaround for a gcc prelease that unfortunately was shipped in a suse release