On 1/8/19 11:18 AM, Cornelia Huck wrote:
On Tue, 8 Jan 2019 10:41:38 +0200
Marcel Apfelbaum <marcel.apfelb...@gmail.com> wrote:
On 1/7/19 7:54 PM, Cornelia Huck wrote:
On Mon, 7 Jan 2019 19:28:10 +0200
Marcel Apfelbaum <marcel.apfelb...@gmail.com> wrote:
On 1/3/19 12:34 PM, Cornelia Huck wrote:
clang-6.0: error: -libumad: 'linker' input unused
[-Werror,-Wunused-command-line-argument]
Is really strange, the rdma-mux is part of the contrib directory
and is not even compiled by default.
Explicitly passing --disable-pvrdma to configure disables the offending
code.
Let me know if you need more information.
Can you please send the exact steps you are using to configure and
compile QEMU,
are you compiling on a x86 machine?
Yes, this is on my laptop (up-to-date F28). I can reproduce on current
master, configured with
../configure --target-list="s390x-softmmu s390x-linux-user i386-softmmu
x86_64-softmmu cris-softmmu arm-softmmu ppc64-softmmu" --enable-linux-aio
--enable-virtfs --enable-trace-backends=simple --cc=clang --enable-rdma --enable-pvrdma
It compiles if I pass --disable-pvrdma instead. It also compiles if I
drop --cc=clang.
I'm building in a build subdirectory; I have already tried purging it
before rebuilding, without luck.
clang --version says
clang version 6.0.1 (tags/RELEASE_601/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Thanks for the information, I will look into it.
Marcel
Thanks.
Another data point: I see the same on a Fedora 29 on s390x, so this
does not seem to be a broken local setup (unless I managed to mess up
both systems in the same way...) clang --version says
clang version 7.0.0 (Fedora 7.0.0-2.fc29)
Target: s390x-ibm-linux
Thread model: posix
InstalledDir: /usr/bin
Hi Cornelia,
I reproduced the issue and found the root cause:
contrib/rdmacm-mux/Makefile.objs:
ifdef CONFIG_PVRDMA
CFLAGS += -libumad -Wno-format-truncation
rdmacm-mux-obj-y = main.o
endif
The above file adds libumad dependency for all project targets even if
not needed.
Gcc allows that while clang forbids it. (is strange it passed patchew tests)
I will come up with a fix soon.
Thanks,
Marcel
