summaryrefslogtreecommitdiffstats
path: root/kernel/tools/perf/config/Makefile
blob: de89ec57436171ef74e5aa48135db8c2e9b4c0a0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
ifeq ($(src-perf),)
src-perf := $(srctree)/tools/perf
endif

ifeq ($(obj-perf),)
obj-perf := $(OUTPUT)
endif

ifneq ($(obj-perf),)
obj-perf := $(abspath $(obj-perf))/
endif

$(shell printf "" > $(OUTPUT).config-detected)
detected     = $(shell echo "$(1)=y"       >> $(OUTPUT).config-detected)
detected_var = $(shell echo "$(1)=$($(1))" >> $(OUTPUT).config-detected)

CFLAGS := $(EXTRA_CFLAGS) $(EXTRA_WARNINGS)

include $(src-perf)/config/Makefile.arch

$(call detected_var,ARCH)

NO_PERF_REGS := 1

# Additional ARCH settings for x86
ifeq ($(ARCH),x86)
  $(call detected,CONFIG_X86)
  ifeq (${IS_64_BIT}, 1)
    CFLAGS += -DHAVE_ARCH_X86_64_SUPPORT
    ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S ../../arch/x86/lib/memset_64.S
    LIBUNWIND_LIBS = -lunwind -lunwind-x86_64
    $(call detected,CONFIG_X86_64)
  else
    LIBUNWIND_LIBS = -lunwind-x86 -llzma -lunwind
  endif
  NO_PERF_REGS := 0
endif

ifeq ($(ARCH),arm)
  NO_PERF_REGS := 0
  LIBUNWIND_LIBS = -lunwind -lunwind-arm
endif

ifeq ($(ARCH),arm64)
  NO_PERF_REGS := 0
  LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
endif

ifeq ($(NO_PERF_REGS),0)
  $(call detected,CONFIG_PERF_REGS)
endif

# So far there's only x86 and arm libdw unwind support merged in perf.
# Disable it on all other architectures in case libdw unwind
# support is detected in system. Add supported architectures
# to the check.
ifneq ($(ARCH),$(filter $(ARCH),x86 arm))
  NO_LIBDW_DWARF_UNWIND := 1
endif

ifeq ($(LIBUNWIND_LIBS),)
  NO_LIBUNWIND := 1
else
  #
  # For linking with debug library, run like:
  #
  #   make DEBUG=1 LIBUNWIND_DIR=/opt/libunwind/
  #
  ifdef LIBUNWIND_DIR
    LIBUNWIND_CFLAGS  = -I$(LIBUNWIND_DIR)/include
    LIBUNWIND_LDFLAGS = -L$(LIBUNWIND_DIR)/lib
  endif
  LIBUNWIND_LDFLAGS += $(LIBUNWIND_LIBS)

  # Set per-feature check compilation flags
  FEATURE_CHECK_CFLAGS-libunwind = $(LIBUNWIND_CFLAGS)
  FEATURE_CHECK_LDFLAGS-libunwind = $(LIBUNWIND_LDFLAGS)
  FEATURE_CHECK_CFLAGS-libunwind-debug-frame = $(LIBUNWIND_CFLAGS)
  FEATURE_CHECK_LDFLAGS-libunwind-debug-frame = $(LIBUNWIND_LDFLAGS)
endif

ifeq ($(NO_PERF_REGS),0)
  CFLAGS += -DHAVE_PERF_REGS_SUPPORT
endif

ifndef NO_LIBELF
  # for linking with debug library, run like:
  # make DEBUG=1 LIBDW_DIR=/opt/libdw/
  ifdef LIBDW_DIR
    LIBDW_CFLAGS  := -I$(LIBDW_DIR)/include
    LIBDW_LDFLAGS := -L$(LIBDW_DIR)/lib
  endif
  FEATURE_CHECK_CFLAGS-libdw-dwarf-unwind := $(LIBDW_CFLAGS)
  FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind := $(LIBDW_LDFLAGS) -ldw
endif

ifdef LIBBABELTRACE
  # for linking with debug library, run like:
  # make DEBUG=1 LIBBABELTRACE_DIR=/opt/libbabeltrace/
  ifdef LIBBABELTRACE_DIR
    LIBBABELTRACE_CFLAGS  := -I$(LIBBABELTRACE_DIR)/include
    LIBBABELTRACE_LDFLAGS := -L$(LIBBABELTRACE_DIR)/lib
  endif
  FEATURE_CHECK_CFLAGS-libbabeltrace := $(LIBBABELTRACE_CFLAGS)
  FEATURE_CHECK_LDFLAGS-libbabeltrace := $(LIBBABELTRACE_LDFLAGS) -lbabeltrace-ctf
endif

FEATURE_CHECK_CFLAGS-bpf = -I. -I$(srctree)/tools/include -I$(srctree)/arch/$(ARCH)/include/uapi -I$(srctree)/include/uapi
# include ARCH specific config
-include $(src-perf)/arch/$(ARCH)/Makefile

ifdef PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET
  CFLAGS += -DHAVE_ARCH_REGS_QUERY_REGISTER_OFFSET
endif

include $(src-perf)/config/utilities.mak

ifeq ($(call get-executable,$(FLEX)),)
  dummy := $(error Error: $(FLEX) is missing on this system, please install it)
endif

ifeq ($(call get-executable,$(BISON)),)
  dummy := $(error Error: $(BISON) is missing on this system, please install it)
endif

# Treat warnings as errors unless directed not to
ifneq ($(WERROR),0)
  CFLAGS += -Werror
endif

ifndef DEBUG
  DEBUG := 0
endif

ifeq ($(DEBUG),0)
  CFLAGS += -O6
else
  CFLAGS += $(call cc-option,-Og,-O0)
endif

ifdef PARSER_DEBUG
  PARSER_DEBUG_BISON := -t
  PARSER_DEBUG_FLEX  := -d
  CFLAGS             += -DPARSER_DEBUG
  $(call detected_var,PARSER_DEBUG_BISON)
  $(call detected_var,PARSER_DEBUG_FLEX)
endif

ifndef NO_LIBPYTHON
  # Try different combinations to accommodate systems that only have
  # python[2][-config] in weird combinations but always preferring
  # python2 and python2-config as per pep-0394. If we catch a
  # python[-config] in version 3, the version check will kill it.
  PYTHON2 := $(if $(call get-executable,python2),python2,python)
  override PYTHON := $(call get-executable-or-default,PYTHON,$(PYTHON2))
  PYTHON2_CONFIG := \
    $(if $(call get-executable,$(PYTHON)-config),$(PYTHON)-config,python-config)
  override PYTHON_CONFIG := \
    $(call get-executable-or-default,PYTHON_CONFIG,$(PYTHON2_CONFIG))

  PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))

  PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
  PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)

  FEATURE_CHECK_CFLAGS-libpython := $(PYTHON_EMBED_CCOPTS)
  FEATURE_CHECK_LDFLAGS-libpython := $(PYTHON_EMBED_LDOPTS)
  FEATURE_CHECK_CFLAGS-libpython-version := $(PYTHON_EMBED_CCOPTS)
  FEATURE_CHECK_LDFLAGS-libpython-version := $(PYTHON_EMBED_LDOPTS)
endif

CFLAGS += -fno-omit-frame-pointer
CFLAGS += -ggdb3
CFLAGS += -funwind-tables
CFLAGS += -Wall
CFLAGS += -Wextra
CFLAGS += -std=gnu99

# Enforce a non-executable stack, as we may regress (again) in the future by
# adding assembler files missing the .GNU-stack linker note.
LDFLAGS += -Wl,-z,noexecstack

EXTLIBS = -lpthread -lrt -lm -ldl

include $(srctree)/tools/build/Makefile.feature

ifeq ($(feature-stackprotector-all), 1)
  CFLAGS += -fstack-protector-all
endif

ifeq ($(DEBUG),0)
  ifeq ($(feature-fortify-source), 1)
    CFLAGS += -D_FORTIFY_SOURCE=2
  endif
endif

CFLAGS += -I$(src-perf)/util/include
CFLAGS += -I$(src-perf)/arch/$(ARCH)/include
CFLAGS += -I$(srctree)/tools/include/
CFLAGS += -I$(srctree)/arch/$(ARCH)/include/uapi
CFLAGS += -I$(srctree)/arch/$(ARCH)/include
CFLAGS += -I$(srctree)/include/uapi
CFLAGS += -I$(srctree)/include

# $(obj-perf)      for generated common-cmds.h
# $(obj-perf)/util for generated bison/flex headers
ifneq ($(OUTPUT),)
CFLAGS += -I$(obj-perf)/util
CFLAGS += -I$(obj-perf)
endif

CFLAGS += -I$(src-perf)/util
CFLAGS += -I$(src-perf)
CFLAGS += -I$(srctree)/tools/lib/

CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE

ifeq ($(feature-sync-compare-and-swap), 1)
  CFLAGS += -DHAVE_SYNC_COMPARE_AND_SWAP_SUPPORT
endif

ifeq ($(feature-pthread-attr-setaffinity-np), 1)
  CFLAGS += -DHAVE_PTHREAD_ATTR_SETAFFINITY_NP
endif

ifndef NO_BIONIC
  $(call feature_check,bionic)
  ifeq ($(feature-bionic), 1)
    BIONIC := 1
    EXTLIBS := $(filter-out -lrt,$(EXTLIBS))
    EXTLIBS := $(filter-out -lpthread,$(EXTLIBS))
  endif
endif

ifdef NO_LIBELF
  NO_DWARF := 1
  NO_DEMANGLE := 1
  NO_LIBUNWIND := 1
  NO_LIBDW_DWARF_UNWIND := 1
  NO_LIBBPF := 1
else
  ifeq ($(feature-libelf), 0)
    ifeq ($(feature-glibc), 1)
      LIBC_SUPPORT := 1
    endif
    ifeq ($(BIONIC),1)
      LIBC_SUPPORT := 1
    endif
    ifeq ($(LIBC_SUPPORT),1)
      msg := $(warning No libelf found, disables 'probe' tool and BPF support in 'perf record', please install elfutils-libelf-devel/libelf-dev);

      NO_LIBELF := 1
      NO_DWARF := 1
      NO_DEMANGLE := 1
      NO_LIBUNWIND := 1
      NO_LIBDW_DWARF_UNWIND := 1
      NO_LIBBPF := 1
    else
      ifneq ($(filter s% -static%,$(LDFLAGS),),)
        msg := $(error No static glibc found, please install glibc-static);
      else
        msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]);
      endif
    endif
  else
    ifndef NO_LIBDW_DWARF_UNWIND
      ifneq ($(feature-libdw-dwarf-unwind),1)
        NO_LIBDW_DWARF_UNWIND := 1
        msg := $(warning No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR);
      endif
    endif
    ifneq ($(feature-dwarf), 1)
      msg := $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev);
      NO_DWARF := 1
    endif # Dwarf support
  endif # libelf support
endif # NO_LIBELF

ifdef NO_DWARF
  NO_LIBDW_DWARF_UNWIND := 1
endif

ifndef NO_LIBELF
  CFLAGS += -DHAVE_LIBELF_SUPPORT
  EXTLIBS += -lelf
  $(call detected,CONFIG_LIBELF)

  ifeq ($(feature-libelf-mmap), 1)
    CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT
  endif

  ifeq ($(feature-libelf-getphdrnum), 1)
    CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT
  endif

  # include ARCH specific config
  -include $(src-perf)/arch/$(ARCH)/Makefile

  ifndef NO_DWARF
    ifeq ($(origin PERF_HAVE_DWARF_REGS), undefined)
      msg := $(warning DWARF register mappings have not been defined for architecture $(ARCH), DWARF support disabled);
      NO_DWARF := 1
    else
      CFLAGS += -DHAVE_DWARF_SUPPORT $(LIBDW_CFLAGS)
      LDFLAGS += $(LIBDW_LDFLAGS)
      DWARFLIBS := -ldw
      ifeq ($(findstring -static,${LDFLAGS}),-static)
	DWARFLIBS += -lelf -lebl -lz -llzma -lbz2
      endif
      EXTLIBS += ${DWARFLIBS}
      $(call detected,CONFIG_DWARF)
    endif # PERF_HAVE_DWARF_REGS
  endif # NO_DWARF

  ifndef NO_LIBBPF
    ifeq ($(feature-bpf), 1)
      CFLAGS += -DHAVE_LIBBPF_SUPPORT
      $(call detected,CONFIG_LIBBPF)
    endif
  endif # NO_LIBBPF
endif # NO_LIBELF

ifeq ($(ARCH),powerpc)
  ifndef NO_DWARF
    CFLAGS += -DHAVE_SKIP_CALLCHAIN_IDX
  endif
endif

ifndef NO_LIBUNWIND
  ifneq ($(feature-libunwind), 1)
    msg := $(warning No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR);
    NO_LIBUNWIND := 1
  endif
endif

ifndef NO_LIBBPF
  ifneq ($(feature-bpf), 1)
    msg := $(warning BPF API too old. Please install recent kernel headers. BPF support in 'perf record' is disabled.)
    NO_LIBBPF := 1
  endif
endif

dwarf-post-unwind := 1
dwarf-post-unwind-text := BUG

# setup DWARF post unwinder
ifdef NO_LIBUNWIND
  ifdef NO_LIBDW_DWARF_UNWIND
    msg := $(warning Disabling post unwind, no support found.);
    dwarf-post-unwind := 0
  else
    dwarf-post-unwind-text := libdw
    $(call detected,CONFIG_LIBDW_DWARF_UNWIND)
  endif
else
  dwarf-post-unwind-text := libunwind
  $(call detected,CONFIG_LIBUNWIND)
  # Enable libunwind support by default.
  ifndef NO_LIBDW_DWARF_UNWIND
    NO_LIBDW_DWARF_UNWIND := 1
  endif
endif

ifeq ($(dwarf-post-unwind),1)
  CFLAGS += -DHAVE_DWARF_UNWIND_SUPPORT
  $(call detected,CONFIG_DWARF_UNWIND)
else
  NO_DWARF_UNWIND := 1
endif

ifndef NO_LIBUNWIND
  ifeq ($(ARCH),$(filter $(ARCH),arm arm64))
    $(call feature_check,libunwind-debug-frame)
    ifneq ($(feature-libunwind-debug-frame), 1)
      msg := $(warning No debug_frame support found in libunwind);
      CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
    endif
  else
    # non-ARM has no dwarf_find_debug_frame() function:
    CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
  endif
  CFLAGS  += -DHAVE_LIBUNWIND_SUPPORT
  EXTLIBS += $(LIBUNWIND_LIBS)
  CFLAGS  += $(LIBUNWIND_CFLAGS)
  LDFLAGS += $(LIBUNWIND_LDFLAGS)
endif

ifndef NO_LIBAUDIT
  ifneq ($(feature-libaudit), 1)
    msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
    NO_LIBAUDIT := 1
  else
    CFLAGS += -DHAVE_LIBAUDIT_SUPPORT
    EXTLIBS += -laudit
    $(call detected,CONFIG_AUDIT)
  endif
endif

ifdef NO_NEWT
  NO_SLANG=1
endif

ifndef NO_SLANG
  ifneq ($(feature-libslang), 1)
    msg := $(warning slang not found, disables TUI support. Please install slang-devel or libslang-dev);
    NO_SLANG := 1
  else
    # Fedora has /usr/include/slang/slang.h, but ubuntu /usr/include/slang.h
    CFLAGS += -I/usr/include/slang
    CFLAGS += -DHAVE_SLANG_SUPPORT
    EXTLIBS += -lslang
    $(call detected,CONFIG_SLANG)
  endif
endif

ifndef NO_GTK2
  FLAGS_GTK2=$(CFLAGS) $(LDFLAGS) $(EXTLIBS) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)
  ifneq ($(feature-gtk2), 1)
    msg := $(warning GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev);
    NO_GTK2 := 1
  else
    ifeq ($(feature-gtk2-infobar), 1)
      GTK_CFLAGS := -DHAVE_GTK_INFO_BAR_SUPPORT
    endif
    CFLAGS += -DHAVE_GTK2_SUPPORT
    GTK_CFLAGS += $(shell $(PKG_CONFIG) --cflags gtk+-2.0 2>/dev/null)
    GTK_LIBS := $(shell $(PKG_CONFIG) --libs gtk+-2.0 2>/dev/null)
    EXTLIBS += -ldl
  endif
endif

grep-libs  = $(filter -l%,$(1))
strip-libs = $(filter-out -l%,$(1))

ifdef NO_LIBPERL
  CFLAGS += -DNO_LIBPERL
else
  PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
  PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
  PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
  PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
  FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)

  ifneq ($(feature-libperl), 1)
    CFLAGS += -DNO_LIBPERL
    NO_LIBPERL := 1
    msg := $(warning Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev);
  else
    LDFLAGS += $(PERL_EMBED_LDFLAGS)
    EXTLIBS += $(PERL_EMBED_LIBADD)
    $(call detected,CONFIG_LIBPERL)
  endif
endif

ifeq ($(feature-timerfd), 1)
  CFLAGS += -DHAVE_TIMERFD_SUPPORT
else
  msg := $(warning No timerfd support. Disables 'perf kvm stat live');
endif

disable-python = $(eval $(disable-python_code))
define disable-python_code
  CFLAGS += -DNO_LIBPYTHON
  $(warning $1)
  NO_LIBPYTHON := 1
endef

ifdef NO_LIBPYTHON
  $(call disable-python,Python support disabled by user)
else

  ifndef PYTHON
    $(call disable-python,No python interpreter was found: disables Python support - please install python-devel/python-dev)
  else
    PYTHON_WORD := $(call shell-wordify,$(PYTHON))

    ifndef PYTHON_CONFIG
      $(call disable-python,No 'python-config' tool was found: disables Python support - please install python-devel/python-dev)
    else

      PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))

      PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
      PYTHON_EMBED_LDFLAGS := $(call strip-libs,$(PYTHON_EMBED_LDOPTS))
      PYTHON_EMBED_LIBADD := $(call grep-libs,$(PYTHON_EMBED_LDOPTS))
      PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
      FLAGS_PYTHON_EMBED := $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)

      ifneq ($(feature-libpython), 1)
        $(call disable-python,No 'Python.h' (for Python 2.x support) was found: disables Python support - please install python-devel/python-dev)
      else

        ifneq ($(feature-libpython-version), 1)
          $(warning Python 3 is not yet supported; please set)
          $(warning PYTHON and/or PYTHON_CONFIG appropriately.)
          $(warning If you also have Python 2 installed, then)
          $(warning try something like:)
          $(warning $(and ,))
          $(warning $(and ,)  make PYTHON=python2)
          $(warning $(and ,))
          $(warning Otherwise, disable Python support entirely:)
          $(warning $(and ,))
          $(warning $(and ,)  make NO_LIBPYTHON=1)
          $(warning $(and ,))
          $(error   $(and ,))
        else
          LDFLAGS += $(PYTHON_EMBED_LDFLAGS)
          EXTLIBS += $(PYTHON_EMBED_LIBADD)
          LANG_BINDINGS += $(obj-perf)python/perf.so
          $(call detected,CONFIG_LIBPYTHON)
        endif
      endif
    endif
  endif
endif

ifeq ($(feature-libbfd), 1)
  EXTLIBS += -lbfd

  # call all detections now so we get correct
  # status in VF output
  $(call feature_check,liberty)
  $(call feature_check,liberty-z)
  $(call feature_check,cplus-demangle)

  ifeq ($(feature-liberty), 1)
    EXTLIBS += -liberty
  else
    ifeq ($(feature-liberty-z), 1)
      EXTLIBS += -liberty -lz
    endif
  endif
endif

ifdef NO_DEMANGLE
  CFLAGS += -DNO_DEMANGLE
else
  ifdef HAVE_CPLUS_DEMANGLE_SUPPORT
    EXTLIBS += -liberty
    CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
  else
    ifneq ($(feature-libbfd), 1)
      ifneq ($(feature-liberty), 1)
        ifneq ($(feature-liberty-z), 1)
          # we dont have neither HAVE_CPLUS_DEMANGLE_SUPPORT
          # or any of 'bfd iberty z' trinity
          ifeq ($(feature-cplus-demangle), 1)
            EXTLIBS += -liberty
            CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
          else
            msg := $(warning No bfd.h/libbfd found, please install binutils-dev[el]/zlib-static/libiberty-dev to gain symbol demangling)
            CFLAGS += -DNO_DEMANGLE
          endif
        endif
      endif
    endif
  endif
endif

ifneq ($(filter -lbfd,$(EXTLIBS)),)
  CFLAGS += -DHAVE_LIBBFD_SUPPORT
endif

ifndef NO_ZLIB
  ifeq ($(feature-zlib), 1)
    CFLAGS += -DHAVE_ZLIB_SUPPORT
    EXTLIBS += -lz
    $(call detected,CONFIG_ZLIB)
  else
    NO_ZLIB := 1
  endif
endif

ifndef NO_LZMA
  ifeq ($(feature-lzma), 1)
    CFLAGS += -DHAVE_LZMA_SUPPORT
    EXTLIBS += -llzma
    $(call detected,CONFIG_LZMA)
  else
    msg := $(warning No liblzma found, disables xz kernel module decompression, please install xz-devel/liblzma-dev);
    NO_LZMA := 1
  endif
endif

ifndef NO_BACKTRACE
  ifeq ($(feature-backtrace), 1)
    CFLAGS += -DHAVE_BACKTRACE_SUPPORT
  endif
endif

ifndef NO_LIBNUMA
  ifeq ($(feature-libnuma), 0)
    msg := $(warning No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev);
    NO_LIBNUMA := 1
  else
    ifeq ($(feature-numa_num_possible_cpus), 0)
      msg := $(warning Old numa library found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev >= 2.0.8);
      NO_LIBNUMA := 1
    else
      CFLAGS += -DHAVE_LIBNUMA_SUPPORT
      EXTLIBS += -lnuma
      $(call detected,CONFIG_NUMA)
    endif
  endif
endif

ifdef HAVE_KVM_STAT_SUPPORT
    CFLAGS += -DHAVE_KVM_STAT_SUPPORT
endif

ifeq (${IS_64_BIT}, 1)
  ifndef NO_PERF_READ_VDSO32
    $(call feature_check,compile-32)
    ifeq ($(feature-compile-32), 1)
      CFLAGS += -DHAVE_PERF_READ_VDSO32
    else
      NO_PERF_READ_VDSO32 := 1
    endif
  endif
  ifneq ($(ARCH), x86)
    NO_PERF_READ_VDSOX32 := 1
  endif
  ifndef NO_PERF_READ_VDSOX32
    $(call feature_check,compile-x32)
    ifeq ($(feature-compile-x32), 1)
      CFLAGS += -DHAVE_PERF_READ_VDSOX32
    else
      NO_PERF_READ_VDSOX32 := 1
    endif
  endif
else
  NO_PERF_READ_VDSO32 := 1
  NO_PERF_READ_VDSOX32 := 1
endif

ifdef LIBBABELTRACE
  $(call feature_check,libbabeltrace)
  ifeq ($(feature-libbabeltrace), 1)
    CFLAGS += -DHAVE_LIBBABELTRACE_SUPPORT $(LIBBABELTRACE_CFLAGS)
    LDFLAGS += $(LIBBABELTRACE_LDFLAGS)
    EXTLIBS += -lbabeltrace-ctf
    $(call detected,CONFIG_LIBBABELTRACE)
  else
    msg := $(warning No libbabeltrace found, disables 'perf data' CTF format support, please install libbabeltrace-dev[el]/libbabeltrace-ctf-dev);
  endif
endif

ifndef NO_AUXTRACE
  ifeq ($(feature-get_cpuid), 0)
    msg := $(warning Your gcc lacks the __get_cpuid() builtin, disables support for auxtrace/Intel PT, please install a newer gcc);
    NO_AUXTRACE := 1
  else
    $(call detected,CONFIG_AUXTRACE)
    CFLAGS += -DHAVE_AUXTRACE_SUPPORT
  endif
endif

# Among the variables below, these:
#   perfexecdir
#   template_dir
#   mandir
#   infodir
#   htmldir
#   ETC_PERFCONFIG (but not sysconfdir)
# can be specified as a relative path some/where/else;
# this is interpreted as relative to $(prefix) and "perf" at
# runtime figures out where they are based on the path to the executable.
# This can help installing the suite in a relocatable way.

# Make the path relative to DESTDIR, not to prefix
ifndef DESTDIR
prefix ?= $(HOME)
endif
bindir_relative = bin
bindir = $(abspath $(prefix)/$(bindir_relative))
mandir = share/man
infodir = share/info
perfexecdir = libexec/perf-core
sharedir = $(prefix)/share
template_dir = share/perf-core/templates
STRACE_GROUPS_DIR = share/perf-core/strace/groups
htmldir = share/doc/perf-doc
ifeq ($(prefix),/usr)
sysconfdir = /etc
ETC_PERFCONFIG = $(sysconfdir)/perfconfig
else
sysconfdir = $(prefix)/etc
ETC_PERFCONFIG = etc/perfconfig
endif
ifndef lib
ifeq ($(ARCH)$(IS_64_BIT), x861)
lib = lib64
else
lib = lib
endif
endif # lib
libdir = $(prefix)/$(lib)

# Shell quote (do not use $(call) to accommodate ancient setups);
ETC_PERFCONFIG_SQ = $(subst ','\'',$(ETC_PERFCONFIG))
STRACE_GROUPS_DIR_SQ = $(subst ','\'',$(STRACE_GROUPS_DIR))
DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
bindir_SQ = $(subst ','\'',$(bindir))
mandir_SQ = $(subst ','\'',$(mandir))
infodir_SQ = $(subst ','\'',$(infodir))
perfexecdir_SQ = $(subst ','\'',$(perfexecdir))
template_dir_SQ = $(subst ','\'',$(template_dir))
htmldir_SQ = $(subst ','\'',$(htmldir))
prefix_SQ = $(subst ','\'',$(prefix))
sysconfdir_SQ = $(subst ','\'',$(sysconfdir))
libdir_SQ = $(subst ','\'',$(libdir))

ifneq ($(filter /%,$(firstword $(perfexecdir))),)
perfexec_instdir = $(perfexecdir)
STRACE_GROUPS_INSTDIR = $(STRACE_GROUPS_DIR)
else
perfexec_instdir = $(prefix)/$(perfexecdir)
STRACE_GROUPS_INSTDIR = $(prefix)/$(STRACE_GROUPS_DIR)
endif
perfexec_instdir_SQ = $(subst ','\'',$(perfexec_instdir))
STRACE_GROUPS_INSTDIR_SQ = $(subst ','\'',$(STRACE_GROUPS_INSTDIR))

# If we install to $(HOME) we keep the traceevent default:
# $(HOME)/.traceevent/plugins
# Otherwise we install plugins into the global $(libdir).
ifdef DESTDIR
plugindir=$(libdir)/traceevent/plugins
plugindir_SQ= $(subst ','\'',$(plugindir))
endif

print_var = $(eval $(print_var_code)) $(info $(MSG))
define print_var_code
    MSG = $(shell printf '...%30s: %s' $(1) $($(1)))
endef

ifeq ($(VF),1)
  $(call print_var,prefix)
  $(call print_var,bindir)
  $(call print_var,libdir)
  $(call print_var,sysconfdir)
  $(call print_var,LIBUNWIND_DIR)
  $(call print_var,LIBDW_DIR)
  $(info )
endif

$(call detected_var,bindir_SQ)
$(call detected_var,PYTHON_WORD)
ifneq ($(OUTPUT),)
$(call detected_var,OUTPUT)
endif
$(call detected_var,htmldir_SQ)
$(call detected_var,infodir_SQ)
$(call detected_var,mandir_SQ)
$(call detected_var,ETC_PERFCONFIG_SQ)
$(call detected_var,STRACE_GROUPS_DIR_SQ)
$(call detected_var,prefix_SQ)
$(call detected_var,perfexecdir_SQ)
$(call detected_var,LIBDIR)
$(call detected_var,GTK_CFLAGS)
$(call detected_var,PERL_EMBED_CCOPTS)
$(call detected_var,PYTHON_EMBED_CCOPTS)