[PATCH 23/79] libperf: Make libperf.a part of the build

From: Jiri Olsa <jolsa@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Andi Kleen <ak@linux.intel.com>,
	Alexey Budankov <alexey.budankov@linux.intel.com>,
	Michael Petlan <mpetlan@redhat.com>
Subject: [PATCH 23/79] libperf: Make libperf.a part of the build
Date: Sun, 21 Jul 2019 13:24:10 +0200	[thread overview]
Message-ID: <20190721112506.12306-24-jolsa@kernel.org> (raw)
In-Reply-To: <20190721112506.12306-1-jolsa@kernel.org>

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

Link: http://lkml.kernel.org/n/tip-lzrlfu3hutepbeqyntjks3za@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.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

