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Date: Wed, 29 Nov 2017 16:54:46 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: Jiri Olsa <jolsa@...hat.com> Cc: Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>, Namhyung Kim <namhyung@...nel.org>, David Ahern <dsahern@...il.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl> Subject: Re: [PATCH 2/3] perf tools: Fix build for hardened environments Em Fri, Nov 10, 2017 at 10:43:25AM +0100, Jiri Olsa escreveu: > On Thu, Nov 09, 2017 at 09:52:12AM -0300, Arnaldo Carvalho de Melo wrote: > > Right, since we want to honour what the distro makers decided was the > > best set for them, and to be able to link with other libraries, etc. > > But then I think this should be done more explicitely, right? Do you > > envision some way to do that without having to try to build perl or > > python, that may not be installed, etc? > I'll check on it.. I think we could use feature detection and > enable that by default and add NO_HARDENED_BUILD variable as > we do for features.. and detect that python/perl or whatever > else is using that and warn > > Of course users wanting to use something different may just set CFLAGS > > and be done with it, in which case I think this should also affect the > > perl and python CFLAGS, removing that distro specific stuff since the > > user is changing something different. > yep Even with this patch applied, as a stopgap solution to allow me to build a full featured tool on f27, I get this leftover: LINK /tmp/build/perf/perf /usr/bin/ld: /tmp/build/perf/libperf.a(libperf-in.o): relocation R_X86_64_32S against symbol `inat_primary_table' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: final link failed: Nonrepresentable section on output collect2: error: ld returned 1 exit status Looking at the Intel PT bits now... - Arnaldo
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