Re: [PATCH 1/1] perf tools: Fix build break on powerpc

[Arnaldo Carvalho de Melo <acme@kernel.org>]

Em Mon, Mar 28, 2016 at 09:35:31AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Sun, Mar 27, 2016 at 01:19:03PM +0200, Jiri Olsa escreveu:
> > On Sat, Mar 26, 2016 at 11:01:47AM -0700, Sukadev Bhattiprolu wrote:
> > > From 502e8236082412db1d33abfad95aaf14b539502e Mon Sep 17 00:00:00 2001
> > > From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
> > > Date: Sat, 26 Mar 2016 17:31:39 -0400
> > > Subject: [PATCH 1/1] perf tools: Fix build break on powerpc
> > > MIME-Version: 1.0
> > > Content-Type: text/plain; charset=UTF-8
> > > Content-Transfer-Encoding: 8bit
> > > 
> > > 'Commit 531d2410635c ("perf tools: Do not include stringify.h from the
> > > kernel sources")' seems to have accidentially removed the inclusion of
> > > "util/header.h" from "arch/powerpc/util/header.c".
> > > 
> > > "util/header.h" provides the prototype for get_cpuid() and is needed to
> > > build perf on Powerpc.
> > > 
> > > 	arch/powerpc/util/header.c:17:1: error: no previous prototype for
> > > 	‘get_cpuid’ [-Werror=missing-prototypes]
> > > 
> > > Reported-by: Michael Ellerman <mpe@ellerman.id.au>
> > > Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
> > > ---
> > >  tools/perf/arch/powerpc/util/header.c | 1 +
> > >  1 file changed, 1 insertion(+)
> > > 
> > > diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c
> > > index 6138bde..5111e34 100644
> > > --- a/tools/perf/arch/powerpc/util/header.c
> > > +++ b/tools/perf/arch/powerpc/util/header.c
> > > @@ -4,6 +4,7 @@
> > >  #include <stdlib.h>
> > >  #include <string.h>
> > >  #include <linux/stringify.h>
> > > +#include "../../util/header.h"
> > 
> > you could use just "header.h" right?
> 
> Like this? I'm trying to find a way to do ppc cross builds, one more
> thing to have in the build-tests...

Argh, only kernel x-builds are supported on Fedora, checking if this is
the case with Debian, if this is supported there, one more Docker image
for building perf :-)

[acme@jouet linux]$ make ARCH=ppc64 CROSS_COMPILE=ppc64-linux-gnu-
O=/tmp/build/perf-ppc64/ -C tools/perf install-bin
make: Entering directory '/home/acme/git/linux/tools/perf'
  BUILD:   Doing 'make -j4' parallel build

Auto-detecting system features:
...                         dwarf: [ OFF ]
...                         glibc: [ OFF ]
...                          gtk2: [ OFF ]
...                      libaudit: [ OFF ]
...                        libbfd: [ OFF ]
...                        libelf: [ OFF ]
...                       libnuma: [ OFF ]
...        numa_num_possible_cpus: [ OFF ]
...                       libperl: [ OFF ]
...                     libpython: [ OFF ]
...                      libslang: [ OFF ]
...                     libcrypto: [ OFF ]
...                     libunwind: [ OFF ]
...            libdw-dwarf-unwind: [ OFF ]
...                          zlib: [ OFF ]
...                          lzma: [ OFF ]
...                     get_cpuid: [ OFF ]
...                           bpf: [ OFF ]

config/Makefile:258: *** No gnu/libc-version.h found, please install
glibc-dev[el].  Stop.
Makefile:108: recipe for target 'install-bin' failed
make: *** [install-bin] Error 2
make: Leaving directory '/home/acme/git/linux/tools/perf'
[acme@jouet linux]$ rpm -q --qf "%{description}\n"
gcc-powerpc64-linux-gnu 
Cross-build GNU C compiler.

Only building kernels is currently supported.  Support for
cross-building user space programs is not currently provided as that
would massively multiply the number of packages.
[acme@jouet linux]$