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SubjectRe: [PATCH v2] Fix objtool with clang
On Mon, Nov 28, 2016 at 05:40:46PM -0200, Arnaldo Carvalho de Melo wrote:

SNIP

> > same here, can't reproduce.. might be some race issue we experienced before
>
> Ok, fails in f25 as well, will try again later taking ccache out of the way, etc.
>
> [acme@jouet linux]$ ccache -V
> ccache version 3.3.3

is there some extra config needed for ccache?

> Copyright (C) 2002-2007 Andrew Tridgell
> Copyright (C) 2009-2016 Joel Rosdahl
>
> This program is free software; you can redistribute it and/or modify it under
> the terms of the GNU General Public License as published by the Free Software
> Foundation; either version 3 of the License, or (at your option) any later
> version.
> [acme@jouet linux]$ gcc -v

I'm on F25 with same gcc version

> Using built-in specs.
> COLLECT_GCC=/usr/bin/gcc
> COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/6.2.1/lto-wrapper
> Target: x86_64-redhat-linux
> Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --disable-libgcj --with-isl --enable-libmpx --enable-gnu-indirect-function --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
> Thread model: posix
> gcc version 6.2.1 20160916 (Red Hat 6.2.1-2) (GCC)
> [acme@jouet linux]$ make -v
> GNU Make 4.1
> Built for x86_64-redhat-linux-gnu
> Copyright (C) 1988-2014 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
> [acme@jouet linux]$
>
>
> [acme@jouet linux]$ rm -rf /tmp/build/perf/ ; mkdir -p /tmp/build/perf ; make -k O=/tmp/build/perf -C tools/perf install-bin
> make: Entering directory '/home/acme/git/linux/tools/perf'
> BUILD: Doing 'make -j4' parallel build

I'm building on 8 CPUs.. so not the race issue I guess

SNIP

> CC /tmp/build/perf/builtin-buildid-list.o
> LD /tmp/build/perf/pmu-events/pmu-events-in.o
> CC /tmp/build/perf/arch/x86/util/intel-bts.o
> CC /tmp/build/perf/builtin-buildid-cache.o
> CC /tmp/build/perf/builtin-list.o
> LD /tmp/build/perf/arch/x86/util/libperf-in.o
> MKDIR /tmp/build/perf/arch/x86/tests/
> CC /tmp/build/perf/arch/x86/tests/regs_load.o
> /tmp/build/perf/.plugin_jbd2.o.cmd:3: *** empty variable name. Stop.
> Makefile:192: recipe for target '/tmp/build/perf/plugin_jbd2-in.o' failed

could you please post /tmp/build/perf/.plugin_jbd2.o.cmd file?

and 'make ... V=1' output?

thanks,
jirka

> make[2]: *** [/tmp/build/perf/plugin_jbd2-in.o] Error 2
> Makefile.perf:591: recipe for target '/tmp/build/perf/libtraceevent-dynamic-list' failed
> make[1]: *** [/tmp/build/perf/libtraceevent-dynamic-list] Error 2
> make[1]: *** Waiting for unfinished jobs....
> MKDIR /tmp/build/perf/arch/x86/tests/
> CC /tmp/build/perf/arch/x86/tests/arch-tests.o

SNIP

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