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 <[email protected]> Signed-off-by: Catalin Marinas <[email protected]>
chewitt · Nov 12, 2015 · 5430978 · 5430978
1 parent 3d6d103
commit 5430978
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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