[PATCH v2 05/14] perf build: Install libperf locally when building

[Ian Rogers <irogers@google.com>]

The perf build currently has a '-Itools/lib' on the CC command
line. This causes issues as the libapi, libsubcmd, libtraceevent,
libbpf headers are all found via this path, making it impossible to
override include behavior. Change the libperf build mirroring the
libbpf, libsubcmd and libapi build, so that it is installed in a
directory along with its headers. A later change will modify the
include behavior.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/.gitignore    |  1 +
 tools/perf/Makefile.perf | 21 ++++++++++++++-------
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
index 1932848343f3..43f6621ef05e 100644
--- a/tools/perf/.gitignore
+++ b/tools/perf/.gitignore
@@ -40,6 +40,7 @@ pmu-events/jevents
 feature/
 libapi/
 libbpf/
+libperf/
 libsubcmd/
 fixdep
 libtraceevent-dynamic-list
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index f8c712e26a69..57aec5a97270 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -294,11 +294,9 @@ strip-libs = $(filter-out -l%,$(1))
 ifneq ($(OUTPUT),)
   TE_PATH=$(OUTPUT)
   PLUGINS_PATH=$(OUTPUT)
-  LIBPERF_PATH=$(OUTPUT)
 else
   TE_PATH=$(TRACE_EVENT_DIR)
   PLUGINS_PATH=$(TRACE_EVENT_DIR)plugins/
-  LIBPERF_PATH=$(LIBPERF_DIR)
 endif
 
 LIBTRACEEVENT = $(TE_PATH)libtraceevent.a
@@ -340,7 +338,14 @@ LIBSUBCMD_DESTDIR = $(LIBSUBCMD_OUTPUT)
 LIBSUBCMD_INCLUDE = $(LIBSUBCMD_DESTDIR)/include
 LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a
 
-LIBPERF = $(LIBPERF_PATH)libperf.a
+ifneq ($(OUTPUT),)
+  LIBPERF_OUTPUT = $(abspath $(OUTPUT))/libperf
+else
+  LIBPERF_OUTPUT = $(CURDIR)/libperf
+endif
+LIBPERF_DESTDIR = $(LIBPERF_OUTPUT)
+LIBPERF_INCLUDE = $(LIBPERF_DESTDIR)/include
+LIBPERF = $(LIBPERF_OUTPUT)/libperf.a
 export LIBPERF
 
 # python extension build directories
@@ -850,12 +855,14 @@ $(LIBBPF)-clean:
 	$(call QUIET_CLEAN, libbpf)
 	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT)
 
-$(LIBPERF): FORCE
-	$(Q)$(MAKE) -C $(LIBPERF_DIR) EXTRA_CFLAGS="$(LIBPERF_CFLAGS)" O=$(OUTPUT) $(OUTPUT)libperf.a
+$(LIBPERF): FORCE | $(LIBPERF_OUTPUT)
+	$(Q)$(MAKE) -C $(LIBPERF_DIR) O=$(LIBPERF_OUTPUT) \
+		DESTDIR=$(LIBPERF_DESTDIR) prefix= \
+		$@ install_headers
 
 $(LIBPERF)-clean:
 	$(call QUIET_CLEAN, libperf)
-	$(Q)$(MAKE) -C $(LIBPERF_DIR) O=$(OUTPUT) clean >/dev/null
+	$(Q)$(RM) -r -- $(LIBPERF_OUTPUT)
 
 $(LIBSUBCMD): FORCE | $(LIBSUBCMD_OUTPUT)
 	$(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
@@ -1050,7 +1057,7 @@ SKELETONS += $(SKEL_OUT)/bperf_cgroup.skel.h $(SKEL_OUT)/func_latency.skel.h
 SKELETONS += $(SKEL_OUT)/off_cpu.skel.h $(SKEL_OUT)/lock_contention.skel.h
 SKELETONS += $(SKEL_OUT)/kwork_trace.skel.h
 
-$(SKEL_TMP_OUT) $(LIBAPI_OUTPUT) $(LIBBPF_OUTPUT) $(LIBSUBCMD_OUTPUT):
+$(SKEL_TMP_OUT) $(LIBAPI_OUTPUT) $(LIBBPF_OUTPUT) $(LIBPERF_OUTPUT) $(LIBSUBCMD_OUTPUT):
 	$(Q)$(MKDIR) -p $@
 
 ifdef BUILD_BPF_SKEL
-- 
2.38.1.431.g37b22c650d-goog