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authorArnd Bergmann <arnd@arndb.de>2015-11-12 15:37:12 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2015-11-12 15:18:07 +0000
commit543097843ca7c9ac3758d0b5879ea2a6f44089de (patch)
treeb8364f375f54a8d0bc8285aa7cb45a77dbd1f763
parent3d6d103538e73a5710ea66d95fa2b652bf6eab77 (diff)
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: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
-rw-r--r--arch/arm64/kernel/vdso/Makefile3
1 files changed, 3 insertions, 0 deletions
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