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Message-ID: <20190726144122.GA20482@kernel.org>
Date: Fri, 26 Jul 2019 11:41:22 -0300
From: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To: Jiri Olsa <jolsa@...nel.org>
Cc: lkml <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Andi Kleen <ak@...ux.intel.com>,
Alexey Budankov <alexey.budankov@...ux.intel.com>,
Michael Petlan <mpetlan@...hat.com>
Subject: Re: [PATCH 23/79] libperf: Make libperf.a part of the build
Em Sun, Jul 21, 2019 at 01:24:10PM +0200, Jiri Olsa escreveu:
> Adding empty libperf.a under toos/perf/lib and
> linking it with perf.
>
> It can also be built separately with:
>
> $ cd tools/perf/lib && make
> CC core.o
> LD libperf-in.o
> AR libperf.a
> LINK libperf.so
Committer notes:
Need to add -I$(srctree)/tools/arch/$(ARCH)/include/uapi
-I$(srctree)/tools/include/uapi to tools/perf/lib/Makefile's INCLUDE
variable to pick up the latest versions of kernel headers, even in older
systems, this is in line with what is in tools/lib/bpf/Makefile.
I.e. this patch:
[acme@...co perf]$ git diff
diff --git a/tools/perf/lib/Makefile b/tools/perf/lib/Makefile
index e6f2eb702aaa..33046e7c6a2a 100644
--- a/tools/perf/lib/Makefile
+++ b/tools/perf/lib/Makefile
@@ -33,7 +33,7 @@ else
CFLAGS := -g -Wall
endif
-INCLUDES = -I. -Iinclude -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(ARCH)/include/
+INCLUDES = -I$(srctree)/tools/perf/lib/include -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(ARCH)/include/ -I$(srctree)/tools/arch/$(ARCH)/include/uapi -I$(srctree)/tools/include/uapi
# Append required CFLAGS
override CFLAGS += $(EXTRA_WARNINGS)
[acme@...co perf]$
- Arnaldo
> Link: http://lkml.kernel.org/n/tip-lzrlfu3hutepbeqyntjks3za@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
> tools/perf/Makefile.config | 1 +
> tools/perf/Makefile.perf | 30 ++++++++--------
> tools/perf/lib/Build | 1 +
> tools/perf/lib/Makefile | 74 ++++++++++++++++++++++++++++++++++++++
> tools/perf/lib/core.c | 0
> 5 files changed, 92 insertions(+), 14 deletions(-)
> create mode 100644 tools/perf/lib/Build
> create mode 100644 tools/perf/lib/Makefile
> create mode 100644 tools/perf/lib/core.c
>
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index 89ac5a1f1550..e4988f49ea79 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -277,6 +277,7 @@ ifeq ($(DEBUG),0)
> endif
> endif
>
> +INC_FLAGS += -I$(src-perf)/lib/include
> INC_FLAGS += -I$(src-perf)/util/include
> INC_FLAGS += -I$(src-perf)/arch/$(SRCARCH)/include
> INC_FLAGS += -I$(srctree)/tools/include/uapi
> diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> index 0fffd2bb6cd9..6e7e7d44ffac 100644
> --- a/tools/perf/Makefile.perf
> +++ b/tools/perf/Makefile.perf
> @@ -224,6 +224,7 @@ LIB_DIR = $(srctree)/tools/lib/api/
> TRACE_EVENT_DIR = $(srctree)/tools/lib/traceevent/
> BPF_DIR = $(srctree)/tools/lib/bpf/
> SUBCMD_DIR = $(srctree)/tools/lib/subcmd/
> +LIBPERF_DIR = $(srctree)/tools/perf/lib/
>
> # Set FEATURE_TESTS to 'all' so all possible feature checkers are executed.
> # Without this setting the output feature dump file misses some features, for
> @@ -272,6 +273,7 @@ ifneq ($(OUTPUT),)
> TE_PATH=$(OUTPUT)
> BPF_PATH=$(OUTPUT)
> SUBCMD_PATH=$(OUTPUT)
> + LIBPERF_PATH=$(OUTPUT)
> ifneq ($(subdir),)
> API_PATH=$(OUTPUT)/../lib/api/
> else
> @@ -282,6 +284,7 @@ else
> API_PATH=$(LIB_DIR)
> BPF_PATH=$(BPF_DIR)
> SUBCMD_PATH=$(SUBCMD_DIR)
> + LIBPERF_PATH=$(LIBPERF_DIR)
> endif
>
> LIBTRACEEVENT = $(TE_PATH)libtraceevent.a
> @@ -303,6 +306,8 @@ LIBBPF = $(BPF_PATH)libbpf.a
>
> LIBSUBCMD = $(SUBCMD_PATH)libsubcmd.a
>
> +LIBPERF = $(LIBPERF_PATH)libperf.a
> +
> # python extension build directories
> PYTHON_EXTBUILD := $(OUTPUT)python_ext_build/
> PYTHON_EXTBUILD_LIB := $(PYTHON_EXTBUILD)lib/
> @@ -348,9 +353,7 @@ endif
>
> export PERL_PATH
>
> -LIBPERF_A=$(OUTPUT)libperf.a
> -
> -PERFLIBS = $(LIBAPI) $(LIBTRACEEVENT) $(LIBSUBCMD)
> +PERFLIBS = $(LIBAPI) $(LIBTRACEEVENT) $(LIBSUBCMD) $(LIBPERF)
> ifndef NO_LIBBPF
> PERFLIBS += $(LIBBPF)
> endif
> @@ -583,8 +586,6 @@ JEVENTS_IN := $(OUTPUT)pmu-events/jevents-in.o
>
> PMU_EVENTS_IN := $(OUTPUT)pmu-events/pmu-events-in.o
>
> -LIBPERF_IN := $(OUTPUT)libperf-in.o
> -
> export JEVENTS
>
> build := -f $(srctree)/tools/build/Makefile.build dir=. obj
> @@ -601,12 +602,9 @@ $(JEVENTS): $(JEVENTS_IN)
> $(PMU_EVENTS_IN): $(JEVENTS) FORCE
> $(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=pmu-events obj=pmu-events
>
> -$(LIBPERF_IN): prepare FORCE
> - $(Q)$(MAKE) $(build)=libperf
> -
> -$(OUTPUT)perf: $(PERFLIBS) $(PERF_IN) $(PMU_EVENTS_IN) $(LIBPERF_IN) $(LIBTRACEEVENT_DYNAMIC_LIST)
> +$(OUTPUT)perf: $(PERFLIBS) $(PERF_IN) $(PMU_EVENTS_IN) $(LIBTRACEEVENT_DYNAMIC_LIST)
> $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(LIBTRACEEVENT_DYNAMIC_LIST_LDFLAGS) \
> - $(PERF_IN) $(PMU_EVENTS_IN) $(LIBPERF_IN) $(LIBS) -o $@
> + $(PERF_IN) $(PMU_EVENTS_IN) $(LIBS) -o $@
>
> $(GTK_IN): FORCE
> $(Q)$(MAKE) $(build)=gtk
> @@ -727,9 +725,6 @@ endif
>
> $(patsubst perf-%,%.o,$(PROGRAMS)): $(wildcard */*.h)
>
> -$(LIBPERF_A): $(LIBPERF_IN)
> - $(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(LIBPERF_IN) $(LIB_OBJS)
> -
> LIBTRACEEVENT_FLAGS += plugin_dir=$(plugindir_SQ) 'EXTRA_CFLAGS=$(EXTRA_CFLAGS)' 'LDFLAGS=$(LDFLAGS)'
>
> $(LIBTRACEEVENT): FORCE
> @@ -762,6 +757,13 @@ $(LIBBPF)-clean:
> $(call QUIET_CLEAN, libbpf)
> $(Q)$(MAKE) -C $(BPF_DIR) O=$(OUTPUT) clean >/dev/null
>
> +$(LIBPERF): FORCE
> + $(Q)$(MAKE) -C $(LIBPERF_DIR) O=$(OUTPUT) $(OUTPUT)libperf.a
> +
> +$(LIBPERF)-clean:
> + $(call QUIET_CLEAN, libperf)
> + $(Q)$(MAKE) -C $(LIBPERF_DIR) O=$(OUTPUT) clean >/dev/null
> +
> $(LIBSUBCMD): FORCE
> $(Q)$(MAKE) -C $(SUBCMD_DIR) O=$(OUTPUT) $(OUTPUT)libsubcmd.a
>
> @@ -948,7 +950,7 @@ config-clean:
> python-clean:
> $(python-clean)
>
> -clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean config-clean fixdep-clean python-clean
> +clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean $(LIBPERF)-clean config-clean fixdep-clean python-clean
> $(call QUIET_CLEAN, core-objs) $(RM) $(LIBPERF_A) $(OUTPUT)perf-archive $(OUTPUT)perf-with-kcore $(LANG_BINDINGS)
> $(Q)find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
> $(Q)$(RM) $(OUTPUT).config-detected
> diff --git a/tools/perf/lib/Build b/tools/perf/lib/Build
> new file mode 100644
> index 000000000000..5196958cec01
> --- /dev/null
> +++ b/tools/perf/lib/Build
> @@ -0,0 +1 @@
> +libperf-y += core.o
> diff --git a/tools/perf/lib/Makefile b/tools/perf/lib/Makefile
> new file mode 100644
> index 000000000000..e6f2eb702aaa
> --- /dev/null
> +++ b/tools/perf/lib/Makefile
> @@ -0,0 +1,74 @@
> +# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
> +# Most of this file is copied from tools/lib/bpf/Makefile
> +
> +MAKEFLAGS += --no-print-directory
> +
> +ifeq ($(srctree),)
> +srctree := $(patsubst %/,%,$(dir $(CURDIR)))
> +srctree := $(patsubst %/,%,$(dir $(srctree)))
> +srctree := $(patsubst %/,%,$(dir $(srctree)))
> +#$(info Determined 'srctree' to be $(srctree))
> +endif
> +
> +include $(srctree)/tools/scripts/Makefile.include
> +include $(srctree)/tools/scripts/Makefile.arch
> +
> +ifeq ("$(origin V)", "command line")
> + VERBOSE = $(V)
> +endif
> +ifndef VERBOSE
> + VERBOSE = 0
> +endif
> +
> +ifeq ($(VERBOSE),1)
> + Q =
> +else
> + Q = @
> +endif
> +
> +# Set compile option CFLAGS
> +ifdef EXTRA_CFLAGS
> + CFLAGS := $(EXTRA_CFLAGS)
> +else
> + CFLAGS := -g -Wall
> +endif
> +
> +INCLUDES = -I. -Iinclude -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(ARCH)/include/
> +
> +# Append required CFLAGS
> +override CFLAGS += $(EXTRA_WARNINGS)
> +override CFLAGS += -Werror -Wall
> +override CFLAGS += -fPIC
> +override CFLAGS += $(INCLUDES)
> +override CFLAGS += -fvisibility=hidden
> +
> +all:
> +
> +export srctree OUTPUT CC LD CFLAGS V
> +include $(srctree)/tools/build/Makefile.include
> +
> +LIBPERF_SO := $(OUTPUT)libperf.so
> +LIBPERF_A := $(OUTPUT)libperf.a
> +LIBPERF_IN := $(OUTPUT)libperf-in.o
> +
> +$(LIBPERF_IN): FORCE
> + $(Q)$(MAKE) $(build)=libperf
> +
> +$(LIBPERF_A): $(LIBPERF_IN)
> + $(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(LIBPERF_IN)
> +
> +$(LIBPERF_SO): $(LIBPERF_IN)
> + $(QUIET_LINK)$(CC) --shared -Wl,-soname,libperf.so $^ -o $@
> +
> +libs: $(LIBPERF_A) $(LIBPERF_SO)
> +
> +all: fixdep
> + $(Q)$(MAKE) libs
> +
> +clean:
> + $(call QUIET_CLEAN, libperf) $(RM) $(LIBPERF_A) \
> + *.o *~ *.a *.so .*.d .*.cmd LIBPERF-CFLAGS
> +
> +FORCE:
> +
> +.PHONY: all install clean FORCE
> diff --git a/tools/perf/lib/core.c b/tools/perf/lib/core.c
> new file mode 100644
> index 000000000000..e69de29bb2d1
> --
> 2.21.0
--
- Arnaldo
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