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perf tools: Use python-config --includes rather than --cflags

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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
c6707fdef7 ("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 <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Jeremy Cline 2018-07-10 11:46:12 -04:00 • committed by Arnaldo Carvalho de Melo
commit 32aa928a7b
1 changed files with 1 additions and 2 deletions
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3
tools/perf/Makefile.config
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@ -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