Commit 54309784 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Catalin Marinas

arm64: build vdso without libgcov

On a cross-toolchain without glibc support, libgcov may not be
available, and attempting to build an arm64 kernel with GCOV
enabled then results in a build error:

/home/arnd/cross-gcc/lib/gcc/aarch64-linux/5.2.1/../../../../aarch64-linux/bin/ld: cannot find -lgcov

We don't really want to link libgcov into the vdso anyway, so
this patch just disables GCOV in the vdso directory, just as
we do for most other architectures.
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 3d6d1035
...@@ -15,6 +15,9 @@ ccflags-y := -shared -fno-common -fno-builtin ...@@ -15,6 +15,9 @@ ccflags-y := -shared -fno-common -fno-builtin
ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \ ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \
$(call cc-ldoption, -Wl$(comma)--hash-style=sysv) $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
# Disable gcov profiling for VDSO code
GCOV_PROFILE := n
# Workaround for bare-metal (ELF) toolchains that neglect to pass -shared # Workaround for bare-metal (ELF) toolchains that neglect to pass -shared
# down to collect2, resulting in silent corruption of the vDSO image. # down to collect2, resulting in silent corruption of the vDSO image.
ccflags-y += -Wl,-shared ccflags-y += -Wl,-shared
......
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