From: Namhyung Kim Date: Mon, 29 Oct 2012 15:06:46 +0000 (+0900) Subject: perf tools: Warn about missing libelf X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d30ff29562ecbf79e82df72724d0c6180f2e2c06;p=linux-beck.git perf tools: Warn about missing libelf When perf detects no libelf during the build, it'll use internal mini elf parser instead of libelf. But as it only supports minimal functionalities, it also disables support to 'probe' builtin command. Currently it didn't warned to user. Fix it. $ sudo apt-get remove libelf-dev $ make CHK -fstack-protector-all CHK -Wstack-protector CHK -Wvolatile-register-var CHK bionic CHK libelf CHK glibc Makefile:491: No libelf found, disables 'probe' tool, please install elfutils-libelf-devel/libelf-dev CHK libunwind CHK libaudit $ make NO_LIBELF=1 CHK -fstack-protector-all CHK -Wstack-protector CHK -Wvolatile-register-var CHK bionic CHK libaudit Reported-by: Peter Zijlstra Signed-off-by: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/n/tip-8ww8zc4hhpxabfskxs3u5ede@git.kernel.org [ committer note: The package needed is elfutils-libelf-devel, not elfutils-devel ] Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 7e25f59e5e89..b1801e0693c9 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -490,6 +490,8 @@ ifneq ($(call try-cc,$(SOURCE_LIBELF),$(FLAGS_LIBELF),libelf),y) LIBC_SUPPORT := 1 endif ifeq ($(LIBC_SUPPORT),1) + msg := $(warning No libelf found, disables 'probe' tool, please install elfutils-libelf-devel/libelf-dev); + NO_LIBELF := 1 NO_DWARF := 1 NO_DEMANGLE := 1