linux-kernel - [PATCH 30/35] perf s390: Always build with -fPIC

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Date:   Thu, 28 Dec 2017 11:30:22 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Thomas Richter <tmricht@...ux.vnet.ibm.com>,
        linux s390 list <linux-s390@...r.kernel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 30/35] perf s390: Always build with -fPIC

From: Hendrik Brueckner <brueckner@...ux.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@...ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Thomas Richter <tmricht@...ux.vnet.ibm.com>
Cc: linux s390 list <linux-s390@...r.kernel.org>
Link: https://lkml.kernel.org/r/20171207080951.GC4889@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/Makefile.config | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index eb6bd99be0bd..f050f38d8fa3 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -58,7 +58,7 @@ endif
 ifeq ($(ARCH),s390)
   NO_PERF_REGS := 0
   NO_SYSCALL_TABLE := 0
-  CFLAGS += -I$(OUTPUT)arch/s390/include/generated
+  CFLAGS += -fPIC -I$(OUTPUT)arch/s390/include/generated
 endif
 
 ifeq ($(NO_PERF_REGS),0)
-- 
2.13.6