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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-04 22:35:47 (GMT) |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-04 22:38:59 (GMT) |
| commit | 2492c465ad3ae6860ebfff1c9032865017835e70 (patch) | |
| tree | 3d90bb4516d8e7bfbff757a824954c8b91a046bd /tools/perf | |
| parent | 4a0f65c102ec3a718b4a0b90981232b6cb019477 (diff) | |
| download | linux-2492c465ad3ae6860ebfff1c9032865017835e70.tar.xz | |
perf build: Add feature detection for libelf's elf_getshdrstrndx()
That appeared after 0.140, and will be used in the SDT code, so, to
avoid bisection break on older systems, add a feature detection and
provide a stub with a pr_debug() to keep it building.
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-80y0eldgweorqnwha9rvfxjr@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/config/Makefile | 4 | ||||
| -rw-r--r-- | tools/perf/util/symbol-elf.c | 8 |
2 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index bf1a0a0..c7e269a 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -309,6 +309,10 @@ ifndef NO_LIBELF CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT endif + ifeq ($(feature-libelf-getshdrstrndx), 1) + CFLAGS += -DHAVE_ELF_GETSHDRSTRNDX_SUPPORT + endif + ifndef NO_DWARF ifeq ($(origin PERF_HAVE_DWARF_REGS), undefined) msg := $(warning DWARF register mappings have not been defined for architecture $(ARCH), DWARF support disabled); diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 87a297d..b222552c 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -54,6 +54,14 @@ static int elf_getphdrnum(Elf *elf, size_t *dst) } #endif +#ifndef HAVE_ELF_GETSHDRSTRNDX_SUPPORT +static int elf_getshdrstrndx(Elf *elf __maybe_unused, size_t *dst __maybe_unused) +{ + pr_err("%s: update your libelf to > 0.140, this one lacks elf_getshdrstrndx().\n", __func__); + return -1; +} +#endif + #ifndef NT_GNU_BUILD_ID #define NT_GNU_BUILD_ID 3 #endif |