From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Hendrik Brueckner <brueckner@linux.vnet.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Thomas Richter <tmricht@linux.vnet.ibm.com>,
linux s390 list <linux-s390@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [PATCH 18/36] perf s390: Always build with -fPIC
Date: Thu, 7 Dec 2017 09:09:51 +0100 [thread overview]
Message-ID: <20171207080951.GC4889@linux.vnet.ibm.com> (raw)
In-Reply-To: <20171206144115.15097-19-acme@kernel.org>
Hi Arnaldo,
On Wed, Dec 06, 2017 at 11:40:57AM -0300, Arnaldo Carvalho de Melo wrote:
> From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
>
> On s390, object files must be compiled with position-indepedent code in
> order to be incrementally linked or linked to shared libraries.
> Therefore, add -fPIC to the CFLAGS for s390 to ensure each object file
> is built properly.
>
> Reported-by: Jonathan Hermann <jonathan.hermann@de.ibm.com>
> Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
> Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
> Cc: linux s390 list <linux-s390@vger.kernel.org>
> LPU-Reference: 1512031765-9382-1-git-send-email-brueckner@linux.vnet.ibm.com
> Link: https://lkml.kernel.org/n/tip-a8wga8hrl0d0r84cal96fmgv@git.kernel.org
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> ---
> tools/perf/Makefile.config | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index 2c437baf8364..bf86c09ca889 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -41,6 +41,7 @@ ifeq ($(SRCARCH),x86)
> LIBUNWIND_LIBS = -lunwind-x86 -llzma -lunwind
> endif
> NO_PERF_REGS := 0
> + CFLAGS += -fPIC
> endif
I was just rebasing my syscall table work on top of your perf/core tree.
It looks like that there is a significant difference compared to linux
master tree.
With f704ef44602fbf403e6722c7ed13f62d17e8cb20 ("s390/perf: add support for
perf_regs and libdw"), Heiko introduced a change in the Makefile.config:
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -53,6 +53,10 @@ ifeq ($(SRCARCH),arm64)
LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
endif
+ifeq ($(ARCH),s390)
+ NO_PERF_REGS := 0
+endif
+
ifeq ($(NO_PERF_REGS),0)
The CFLAGS actually should applied to the s390 block and not in the x86
block. Somehow this got messed up with git cherryp-pick / am. So actually,
this should go into the section above:
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index ed65e82..0833d9f 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -55,6 +55,7 @@ endif
ifeq ($(ARCH),s390)
NO_PERF_REGS := 0
+ CFLAGS += -fPIC
endif
ifeq ($(NO_PERF_REGS),0)
next prev parent reply other threads:[~2017-12-07 8:09 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20171206144115.15097-1-acme@kernel.org>
2017-12-06 14:40 ` [PATCH 01/36] tools headers: Follow the upstream UAPI header version 100% differ from the kernel Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 02/36] perf test: Disable test cases 19 and 20 on s390x Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 03/36] perf record: Synthesize unit/scale/... in event update Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 04/36] perf record: Synthesize thread map and cpu map Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 05/36] perf script: Allow computing 'perf stat' style metrics Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 06/36] perf buildid-cache: Document for Node.js USDT Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 07/36] perf report: Fix -D output for user metadata events Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 08/36] perf intel-pt: Improve build messages for files that differ from the kernel Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 09/36] Documentation: Add Arnaldo Melo to list of enforcement statement endorsers Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 10/36] perf bench futex: Use cpumaps Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 11/36] tools build feature: Check if pthread_barrier_t is available Arnaldo Carvalho de Melo
2017-12-06 21:31 ` Philippe Ombredanne
2017-12-07 11:24 ` Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 12/36] perf bench futex: Sync waker threads Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 13/36] perf annotate: Fix unnecessary memory allocation for s390x Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 14/36] perf annotate: Fix objdump comment parsing for Intel mov dissassembly Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 15/36] perf rblist: Create rblist__exit() function Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 16/36] perf stat: Add rbtree node_delete op Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 17/36] perf thread_map: Add method to map all threads in the system Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 18/36] perf s390: Always build with -fPIC Arnaldo Carvalho de Melo
2017-12-07 8:09 ` Hendrik Brueckner [this message]
2017-12-06 14:40 ` [PATCH 19/36] perf pmu: Pass pmu as a parameter to get_cpuid_str() Arnaldo Carvalho de Melo
2017-12-06 14:40 ` [PATCH 20/36] perf tools arm64: Add support for get_cpuid_str function Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 21/36] perf pmu: Add helper function is_pmu_core to detect PMU CORE devices Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 22/36] perf vendor events arm64: Add ThunderX2 implementation defined pmu core events Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 23/36] perf pmu: Add check for valid cpuid in perf_pmu__find_map() Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 24/36] perf tools: Fix up build in hardnened environments Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 25/36] perf evlist: Remove 'overwrite' parameter from perf_evlist__mmap Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 26/36] perf evlist: Remove 'overwrite' parameter from perf_evlist__mmap_ex Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 27/36] perf evlist: Remove evlist->overwrite Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 28/36] perf mmap: Remove overwrite from arguments list of perf_mmap__push Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 29/36] perf mmap: Remove overwrite and check_messup from mmap read Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 30/36] perf c2c: Add a tip about cacheline events Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 31/36] perf vendor events: Use more flexible pattern matching for CPU identification for mapfile.csv Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 32/36] x86/asm: Allow again using asm.h when building for the 'bpf' clang target Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 33/36] perf report: Set browser mode right before setup_browser() Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 34/36] perf mmap: Fix perf backward recording Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 35/36] perf mmap: Don't discard prev in backward mode Arnaldo Carvalho de Melo
2017-12-06 14:41 ` [PATCH 36/36] perf tools: Rename 'backward' to 'overwrite' in evlist, mmap and record Arnaldo Carvalho de Melo
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