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perf tools: Enable libtraceevent dynamic linking

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Currently we support only static linking with kernel's libtraceevent
(tools/lib/traceevent). This patch adds libtraceevent package detection
and support to link perf with it dynamically.

  The libtraceevent package status is displayed with:
  $ make VF=1 LIBTRACEEVENT_DYNAMIC=1
  ...
  ...                 libtraceevent: [ on  ]

Default behavior remains the same (static linking).

Committer testing:

  $ make LIBTRACEEVENT_DYNAMIC=1 VF=1 O=/tmp/build/perf -C tools/perf install-bin |& grep traceevent
  Makefile.config:1090: *** Error: No libtraceevent devel library found, please install libtraceevent-devel.  Stop.
  $

Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
LPU-Reference: 20210428092023.4009-1-mpetlan@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Michael Petlan 2021-04-28 11:20:23 +02:00 committed by Arnaldo Carvalho de Melo
parent 2750ce1d4d
commit 56d32d4cac
5 changed files with 32 additions and 2 deletions
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1
tools/build/Makefile.feature
View File

@ -52,6 +52,7 @@ FEATURE_TESTS_BASIC := \
libpython-version \
libslang \
libslang-include-subdir \
libtraceevent \
libcrypto \
libunwind \
pthread-attr-setaffinity-np \

4
tools/build/feature/Makefile
View File

@ -36,6 +36,7 @@ FILES= \
test-libpython-version.bin \
test-libslang.bin \
test-libslang-include-subdir.bin \
test-libtraceevent.bin \
test-libcrypto.bin \
test-libunwind.bin \
test-libunwind-debug-frame.bin \
@ -196,6 +197,9 @@ $(OUTPUT)test-libslang.bin:
$(OUTPUT)test-libslang-include-subdir.bin:
$(BUILD) -lslang
$(OUTPUT)test-libtraceevent.bin:
$(BUILD) -ltraceevent
$(OUTPUT)test-libcrypto.bin:
$(BUILD) -lcrypto

12
tools/build/feature/test-libtraceevent.c Normal file
View File

@ -0,0 +1,12 @@
// SPDX-License-Identifier: GPL-2.0
#include <traceevent/trace-seq.h>
int main(void)
{
int rv = 0;
struct trace_seq s;
trace_seq_init(&s);
rv += !(s.state == TRACE_SEQ__GOOD);
trace_seq_destroy(&s);
return rv;
}

9
tools/perf/Makefile.config
View File

@ -1079,6 +1079,15 @@ ifdef LIBPFM4
endif
endif
ifdef LIBTRACEEVENT_DYNAMIC
$(call feature_check,libtraceevent)
ifeq ($(feature-libtraceevent), 1)
EXTLIBS += -ltraceevent
else
dummy := $(error Error: No libtraceevent devel library found, please install libtraceevent-devel);
endif
endif
# Among the variables below, these:
# perfexecdir
# perf_include_dir

8
tools/perf/Makefile.perf
View File

@ -128,6 +128,8 @@ include ../scripts/utilities.mak
#
# Define BUILD_BPF_SKEL to enable BPF skeletons
#
# Define LIBTRACEEVENT_DYNAMIC to enable libtraceevent dynamic linking
#
# As per kernel Makefile, avoid funny character set dependencies
unexport LC_ALL
@ -310,7 +312,6 @@ endif
LIBTRACEEVENT = $(TE_PATH)libtraceevent.a
export LIBTRACEEVENT
LIBTRACEEVENT_DYNAMIC_LIST = $(PLUGINS_PATH)libtraceevent-dynamic-list
#
@ -375,12 +376,15 @@ endif
export PERL_PATH
PERFLIBS = $(LIBAPI) $(LIBTRACEEVENT) $(LIBSUBCMD) $(LIBPERF)
PERFLIBS = $(LIBAPI) $(LIBSUBCMD) $(LIBPERF)
ifndef NO_LIBBPF
ifndef LIBBPF_DYNAMIC
PERFLIBS += $(LIBBPF)
endif
endif
ifndef LIBTRACEEVENT_DYNAMIC
PERFLIBS += $(LIBTRACEEVENT)
endif
# We choose to avoid "if .. else if .. else .. endif endif"
# because maintaining the nesting to match is a pain. If