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arm64: vdso: Fix compilation with clang older than 8

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clang versions older than 8 do not support -mcmodel=tiny.

Add a check to the vDSO Makefile for arm64 to remove the flag when
these versions of the compiler are detected.

Reported-by: Qian Cai <[email protected]>
Signed-off-by: Vincenzo Frascino <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Qian Cai <[email protected]>
Cc: [email protected]
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Link: https://lkml.kernel.org/r/[email protected]
This commit is contained in:
Vincenzo Frascino 2019-06-26 12:36:32 +01:00 • committed by Thomas Gleixner
commit 3acf4be235
1 changed files with 7 additions and 0 deletions
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7
arch/arm64/kernel/vdso/Makefile
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@ -38,6 +38,13 @@ else
CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny -include $(c-gettimeofday-y)
endif
# Clang versions less than 8 do not support -mcmodel=tiny
ifeq ($(CONFIG_CC_IS_CLANG), y)
ifeq ($(shell test $(CONFIG_CLANG_VERSION) -lt 80000; echo $$?),0)
CFLAGS_REMOVE_vgettimeofday.o += -mcmodel=tiny
endif
endif
# Disable gcov profiling for VDSO code
GCOV_PROFILE := n