Messages in this thread Patch in this message | | | From | Sudeep Holla <> | Subject | [PATCH v2] tools: perf: fix linker error when libelf config is disabled | Date | Wed, 4 Jan 2017 15:56:03 +0000 |
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When libelf is disabled in the configuration, we get the following linker error: LINK libperf-jvmti.so ld: cannot find -lelf Makefile.perf:515: recipe for target 'libperf-jvmti.so' failed
Jiri pointed out that both librt and libelf are not really required. So this patch fixes the linker error by getting rid of unwanted libraries in the linker stage.
Fixes: d4dfdf00d43e ("perf jvmti: Plug compilation into perf build") Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- tools/perf/Makefile.perf | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
v1->v2: - Dropped libelf and librt as they are not required
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 8fc24824705e..9e4a7ea84637 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -512,7 +512,7 @@ $(LIBJVMTI_IN): FORCE $(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=jvmti obj=jvmti
$(OUTPUT)$(LIBJVMTI): $(LIBJVMTI_IN) - $(QUIET_LINK)$(CC) -shared -Wl,-soname -Wl,$(LIBJVMTI) -o $@ $< -lelf -lrt + $(QUIET_LINK)$(CC) -shared -Wl,-soname -Wl,$(LIBJVMTI) -o $@ $< endif
$(patsubst perf-%,%.o,$(PROGRAMS)): $(wildcard */*.h) -- 2.7.4
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