Messages in this thread Patch in this message | | | From | Arnd Bergmann <> | Subject | [PATCH] ARM64: build vdso without libgcov | Date | Thu, 12 Nov 2015 15:37:12 +0100 |
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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: Arnd Bergmann <arnd@arndb.de> --- Found trying to build allmodconfig
diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index f6fe17d88da5..b467fd0a384b 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -15,6 +15,9 @@ ccflags-y := -shared -fno-common -fno-builtin ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \ $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) +# Disable gcov profiling for VDSO code +GCOV_PROFILE := n + # Workaround for bare-metal (ELF) toolchains that neglect to pass -shared # down to collect2, resulting in silent corruption of the vDSO image. ccflags-y += -Wl,-shared
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