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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Clark Williams <williams@redhat.com>,
	linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	Jeremy Cline <jcline@redhat.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 14/14] perf tools: Use python-config --includes rather than --cflags
Date: Wed, 11 Jul 2018 16:43:05 -0400	[thread overview]
Message-ID: <20180711204305.12924-15-acme@kernel.org> (raw)
In-Reply-To: <20180711204305.12924-1-acme@kernel.org>

From: Jeremy Cline <jcline@redhat.com>

Builds started failing in Fedora on Python 3.7 with:

    `.gnu.debuglto_.debug_macro' referenced in section
    `.gnu.debuglto_.debug_macro' of
    util/scripting-engines/trace-event-python.o: defined in discarded
    section

In Fedora, Python 3.7 added -flto to the list of --cflags and since it
was only applied to util/scripting-engines/trace-event-python.c and
scripts/python/Perf-Trace-Util/Context.c, linking failed.

It's not the first time the addition of flags has broken builds: commit
c6707fdef7e2 ("perf tools: Fix up build in hardnened environments")
appears to have fixed a similar problem. "python-config --includes"
provides the proper -I flags and doesn't introduce additional CFLAGS.

Signed-off-by: Jeremy Cline <jcline@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180710154612.6285-1-jcline@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Makefile.config | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index b5ac356ba323..f5a3b402589e 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -207,8 +207,7 @@ ifdef PYTHON_CONFIG
   PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
   PYTHON_EMBED_LDFLAGS := $(call strip-libs,$(PYTHON_EMBED_LDOPTS))
   PYTHON_EMBED_LIBADD := $(call grep-libs,$(PYTHON_EMBED_LDOPTS)) -lutil
-  PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
-  PYTHON_EMBED_CCOPTS := $(filter-out -specs=%,$(PYTHON_EMBED_CCOPTS))
+  PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --includes 2>/dev/null)
   FLAGS_PYTHON_EMBED := $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
 endif
 
-- 
2.14.4


  parent reply	other threads:[~2018-07-11 20:45 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-11 20:42 [GIT PULL 00/14] perf/urgent fixes Arnaldo Carvalho de Melo
2018-07-11 20:42 ` [PATCH 01/14] perf tools: Generate a Python script compatible with Python 2 and 3 Arnaldo Carvalho de Melo
2018-07-11 20:42 ` [PATCH 02/14] perf scripts python: Add Python 3 support to Core.py Arnaldo Carvalho de Melo
2018-07-11 20:42 ` [PATCH 03/14] perf scripts python: Add Python 3 support to SchedGui.py Arnaldo Carvalho de Melo
2018-07-11 20:42 ` [PATCH 04/14] perf scripts python: Add Python 3 support to Util.py Arnaldo Carvalho de Melo
2018-07-11 20:42 ` [PATCH 05/14] perf scripts python: Add Python 3 support to sched-migration.py Arnaldo Carvalho de Melo
2018-07-11 20:42 ` [PATCH 06/14] perf scripts python: Add Python 3 support to EventClass.py Arnaldo Carvalho de Melo
2018-07-11 20:42 ` [PATCH 07/14] perf test shell: Replace '|&' with '2>&1 |' to work with more shells Arnaldo Carvalho de Melo
2018-07-11 20:42 ` [PATCH 08/14] perf test shell: Make perf's inet_pton test more portable Arnaldo Carvalho de Melo
2018-07-11 20:43 ` [PATCH 09/14] perf llvm-utils: Remove bashism from kernel include fetch script Arnaldo Carvalho de Melo
2018-07-11 20:43 ` [PATCH 10/14] perf test shell: Prevent temporary editor files from being considered test scripts Arnaldo Carvalho de Melo
2018-07-11 20:43 ` [PATCH 11/14] perf tools: Fix compilation errors on gcc8 Arnaldo Carvalho de Melo
2018-07-11 20:43 ` [PATCH 12/14] perf stat: Fix --interval_clear option Arnaldo Carvalho de Melo
2018-07-11 20:43 ` [PATCH 13/14] perf script python: Fix dict reference counting Arnaldo Carvalho de Melo
2018-07-11 20:43 ` Arnaldo Carvalho de Melo [this message]
2018-07-12 13:54 ` [GIT PULL 00/14] perf/urgent fixes Ingo Molnar

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