intel-gpu-overlay: Move local perf implementation to a library

Idea is to avoid duplication across multiple users in
upcoming patches.

v2: Commit message and use a separate library instead of piggy-
    backing to libintel_tools. (Chris Wilson)

v3: Add Petri's meson build recipe.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

lib/Makefile.am

@@ -7,7 +7,11 @@ include Makefile.sources
 
 libintel_tools_la_SOURCES = $(lib_source_list)
 
-noinst_LTLIBRARIES = libintel_tools.la
+libigt_perf_la_SOURCES = \
+	igt_perf.c	 \
+	igt_perf.h
+
+noinst_LTLIBRARIES = libintel_tools.la libigt_perf.la
 noinst_HEADERS = check-ndebug.h
 
 if BUILD_VC4

overlay/perf.c → lib/igt_perf.c

@@ -3,7 +3,7 @@
 #include <unistd.h>
 #include <stdlib.h>
 
-#include "perf.h"
+#include "igt_perf.h"
 
 uint64_t i915_type_id(void)
 {

overlay/perf.h → lib/igt_perf.h

 #ifndef I915_PERF_H
 #define I915_PERF_H
 
+#include <stdint.h>
+
 #include <linux/perf_event.h>
 
 #define I915_SAMPLE_BUSY	0

lib/meson.build

@@ -179,4 +179,8 @@ lib_igt = declare_dependency(link_with : lib_igt_build,
 
 igt_deps = [ lib_igt ] + lib_deps
 
+lib_igt_perf = static_library('igt_perf',
+	['igt_perf.c']
+)
+
 subdir('tests')

overlay/Makefile.am

@@ -4,8 +4,8 @@ endif
 
 AM_CPPFLAGS = -I.
 AM_CFLAGS = $(DRM_CFLAGS) $(PCIACCESS_CFLAGS) $(CWARNFLAGS) \
-	$(CAIRO_CFLAGS) $(OVERLAY_CFLAGS) $(WERROR_CFLAGS)
-LDADD = $(DRM_LIBS) $(PCIACCESS_LIBS) $(CAIRO_LIBS) $(OVERLAY_LIBS)
+	$(CAIRO_CFLAGS) $(OVERLAY_CFLAGS) $(WERROR_CFLAGS) -I$(srcdir)/../lib
+LDADD = $(DRM_LIBS) $(PCIACCESS_LIBS) $(CAIRO_LIBS) $(OVERLAY_LIBS) $(top_builddir)/lib/libigt_perf.la
 
 intel_gpu_overlay_SOURCES = \
 	chart.h \
@@ -29,8 +29,6 @@ intel_gpu_overlay_SOURCES = \
 	igfx.c \
 	overlay.h \
 	overlay.c \
-	perf.h \
-	perf.c \
 	power.h \
 	power.c \
 	rc6.h \

overlay/gem-interrupts.c

@@ -31,9 +31,10 @@
 #include <string.h>
 #include <ctype.h>
 
+#include "igt_perf.h"
+
 #include "gem-interrupts.h"
 #include "debugfs.h"
-#include "perf.h"
 
 static int perf_open(void)
 {

overlay/gpu-freq.c

@@ -28,9 +28,10 @@
 #include <string.h>
 #include <stdio.h>
 
+#include "igt_perf.h"
+
 #include "gpu-freq.h"
 #include "debugfs.h"
-#include "perf.h"
 
 static int perf_i915_open(int config, int group)
 {

overlay/gpu-perf.c

@@ -34,7 +34,8 @@
 #include <fcntl.h>
 #include <errno.h>
 
-#include "perf.h"
+#include "igt_perf.h"
+
 #include "gpu-perf.h"
 #include "debugfs.h"
 

overlay/gpu-top.c

@@ -31,7 +31,8 @@
 #include <errno.h>
 #include <assert.h>
 
-#include "perf.h"
+#include "igt_perf.h"
+
 #include "igfx.h"
 #include "gpu-top.h"
 

overlay/meson.build

@@ -10,7 +10,6 @@ gpu_overlay_src = [
 	'gpu-freq.c',
 	'igfx.c',
 	'overlay.c',
-	'perf.c',
 	'power.c',
 	'rc6.c',
 ]
@@ -56,5 +55,6 @@ if xrandr.found() and cairo.found()
 			include_directories : inc,
 			c_args : gpu_overlay_cflags,
 			dependencies : gpu_overlay_deps,
+			link_with : lib_igt_perf,
 			install : true)
 endif

overlay/power.c

@@ -31,7 +31,8 @@
 #include <time.h>
 #include <errno.h>
 
-#include "perf.h"
+#include "igt_perf.h"
+
 #include "power.h"
 #include "debugfs.h"
 

overlay/rc6.c

@@ -31,8 +31,9 @@
 #include <time.h>
 #include <errno.h>
 
+#include "igt_perf.h"
+
 #include "rc6.h"
-#include "perf.h"
 
 static int perf_i915_open(int config, int group)
 {