Re: kselftest build broken?

[shuah <shuah@kernel.org>]

Hi Dmitry,

On 6/11/19 4:30 AM, Dmitry Vyukov wrote:
> Hi,
> 
> I've tried to build kselftests for several years now, but I always
> find the build broken. Which makes me wonder if the instructions are
> broken or something. I follow the instructions in
> Documentation/dev-tools/kselftest.rst and start with "make -C
> tools/testing/selftests". Here is the errors I get on the upstream
> commit 16d72dd4891fecc1e1bf7ca193bb7d5b9804c038:
> > error: unable to create target: 'No available targets are compatible
> with triple "bpf"'
> 1 error generated.
> Makefile:259: recipe for target 'elfdep' failed
> Makefile:156: recipe for target 'all' failed
> Makefile:106: recipe for target
> '/linux/tools/testing/selftests/bpf/libbpf.a' failed
> test_execve.c:4:10: fatal error: cap-ng.h: No such file or directory

These errors are due to missing dependencies. You will need

libmount-dev
libcap-ng-dev
libelf-dev

for bpf to build and also clang

> ../lib.mk:138: recipe for target
> '/linux/tools/testing/selftests/capabilities/test_execve' failed
> gpio-mockup-chardev.c:20:10: fatal error: libmount.h: No such file or directory > <builtin>: recipe for target 'gpio-mockup-chardev' failed
> fuse_mnt.c:17:10: fatal error: fuse.h: No such file or directory

libfuse-dev is missing.

> ../lib.mk:138: recipe for target
> '/linux/tools/testing/selftests/memfd/fuse_mnt' failed
> collect2: error: ld returned 1 exit status
> ../lib.mk:138: recipe for target
> '/linux/tools/testing/selftests/mqueue/mq_open_tests' failed

Needs libpopt-dev

> reuseport_bpf_numa.c:24:10: fatal error: numa.h: No such file or directory

Needs libnuma-dev

> ../lib.mk:138: recipe for target
> '/linux/tools/testing/selftests/net/reuseport_bpf_numa' failed
> mlock-random-test.c:8:10: fatal error: sys/capability.h: No such file
> or directory > ../lib.mk:138: recipe for target
> '/linux/tools/testing/selftests/vm/mlock-random-test' failed
> 
> Here is full log:
> 
> https://gist.githubusercontent.com/dvyukov/47430636e160f297b657df5ba2efa82b/raw/7babc4db228b88f341a376c15e8bc9c4c3b02160/gistfile1.txt
> 
> I have libelf-dev installed. Do I need to install something else? Or
> run some other command?

ii  libelf-dev:amd 0.170-0.4ubu amd64        libelf1 development 
libraries and
ii  libelf1:amd64  0.170-0.4ubu amd64        library to read and write 
ELF fil


All of the above built for me on Linux 5.2-rc4. Try installing all of
these and let me know if you still see problems.
thanks,
-- Shuah