Re: [PATCH 0/7] gcov kernel support

From: Segher Boessenkool
Date: Fri May 23 2008 - 07:09:27 EST

This is version #2 of the gcov kernel support patch set

powerpc blew up:

/opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/lib/ gcc/powerpc64-unknown-linux-gnu/4.1.0/../../../../powerpc64-unknown- linux-gnu/bin/ld: skipping incompatible /opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/lib/ gcc/powerpc64-unknown-linux-gnu/4.1.0/./libgcov.a when searching for -lgcov
/opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/lib/ gcc/powerpc64-unknown-linux-gnu/4.1.0/../../../../powerpc64-unknown- linux-gnu/bin/ld: cannot find -lgcov
collect2: ld returned 1 exit status
make[2]: *** [arch/powerpc/kernel/vdso32/] Error 1
make[1]: *** [arch/powerpc/kernel/vdso32] Error 2

Sounds like your toolchain was built without biarch support, but you're
using it for the 32-bit parts of the kernel anyway. Which works as long
as you're not using any libraries, but now you need libgcov.a .

What does

/opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/bin/ powerpc64-unknown-linux-gnu-gcc -v

say? (Or whatever the correct path to that compiler is, the directory
structure is a bit unusual here it seems). There shouldn't be a
--disable-biarch there.

Or, what does

find /opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/4.1.0/ -name libgcov.a

say? (It should usually find three versions: 64-bit, 32-bit, 32-bit no float).

You *can* build with a non-biarch compiler, but then you need to point
the kernel build system at a 32-bit toolchain to use for the 32-bit
parts (via CROSS32_COMPILE).


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at