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authorNamhyung Kim <namhyung@kernel.org>2023-11-09 15:59:27 -0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2023-11-10 09:04:16 -0300
commitf67f2fda7d997a43e3323aec88d76f1b5e0ea5f2 (patch)
tree28927aa0d599b34735cb717fdaf70f432ff130b0 /tools/build
parent3f5928e461e394d27bc1ed7d0785b1e63c43d6a1 (diff)
perf build: Add feature check for dwarf_getcfi()
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>
Diffstat (limited to 'tools/build')
-rw-r--r--tools/build/Makefile.feature1
-rw-r--r--tools/build/feature/Makefile4
-rw-r--r--tools/build/feature/test-dwarf_getcfi.c9
3 files changed, 14 insertions, 0 deletions
diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index 934e2777a2db..64df118376df 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -32,6 +32,7 @@ FEATURE_TESTS_BASIC := \
backtrace \
dwarf \
dwarf_getlocations \
+ dwarf_getcfi \
eventfd \
fortify-source \
get_current_dir_name \
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index dad79ede4e0a..37722e509eb9 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -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
diff --git a/tools/build/feature/test-dwarf_getcfi.c b/tools/build/feature/test-dwarf_getcfi.c
new file mode 100644
index 000000000000..50e7d7cb7bdf
--- /dev/null
+++ b/tools/build/feature/test-dwarf_getcfi.c
@@ -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;
+}