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perf build: Add feature check for dwarf_getcfi()

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The dwarf_getcfi() is available on libdw 0.142+.  Instead of just
checking the version number, it'd be nice to have a config item to check
the feature at build time.

Suggested-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: linux-toolchains@vger.kernel.org
Cc: linux-trace-devel@vger.kernel.org
Link: https://lore.kernel.org/r/20231110000012.3538610-9-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2023-11-09 15:59:27 -08:00 committed by Arnaldo Carvalho de Melo
parent 3f5928e461
commit f67f2fda7d
3 changed files with 14 additions and 0 deletions
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1
tools/build/Makefile.feature
View File

@ -32,6 +32,7 @@ FEATURE_TESTS_BASIC := \
backtrace \
dwarf \
dwarf_getlocations \
dwarf_getcfi \
eventfd \
fortify-source \
get_current_dir_name \

4
tools/build/feature/Makefile
View File

@ -7,6 +7,7 @@ FILES= \
test-bionic.bin \
test-dwarf.bin \
test-dwarf_getlocations.bin \
test-dwarf_getcfi.bin \
test-eventfd.bin \
test-fortify-source.bin \
test-get_current_dir_name.bin \
@ -154,6 +155,9 @@ $(OUTPUT)test-dwarf.bin:
$(OUTPUT)test-dwarf_getlocations.bin:
$(BUILD) $(DWARFLIBS)
$(OUTPUT)test-dwarf_getcfi.bin:
$(BUILD) $(DWARFLIBS)
$(OUTPUT)test-libelf-getphdrnum.bin:
$(BUILD) -lelf

9
tools/build/feature/test-dwarf_getcfi.c Normal file
View File

@ -0,0 +1,9 @@
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <elfutils/libdw.h>
int main(void)
{
Dwarf *dwarf = NULL;
return dwarf_getcfi(dwarf) == NULL;
}