3 src-perf := $(srctree)/tools/perf
11 obj-perf := $(abspath $(obj-perf))/
14 LIB_INCLUDE := $(srctree)/tools/lib/
15 CFLAGS := $(EXTRA_CFLAGS) $(EXTRA_WARNINGS)
17 include $(src-perf)/config/Makefile.arch
21 # Additional ARCH settings for x86
23 ifeq (${IS_64_BIT}, 1)
24 CFLAGS += -DHAVE_ARCH_X86_64_SUPPORT
25 ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S ../../arch/x86/lib/memset_64.S
26 LIBUNWIND_LIBS = -lunwind -lunwind-x86_64
28 LIBUNWIND_LIBS = -lunwind -lunwind-x86
35 LIBUNWIND_LIBS = -lunwind -lunwind-arm
40 LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
43 # So far there's only x86 and arm libdw unwind support merged in perf.
44 # Disable it on all other architectures in case libdw unwind
45 # support is detected in system. Add supported architectures
47 ifneq ($(ARCH),$(filter $(ARCH),x86 arm))
48 NO_LIBDW_DWARF_UNWIND := 1
51 ifeq ($(LIBUNWIND_LIBS),)
55 # For linking with debug library, run like:
57 # make DEBUG=1 LIBUNWIND_DIR=/opt/libunwind/
60 LIBUNWIND_CFLAGS = -I$(LIBUNWIND_DIR)/include
61 LIBUNWIND_LDFLAGS = -L$(LIBUNWIND_DIR)/lib
63 LIBUNWIND_LDFLAGS += $(LIBUNWIND_LIBS)
65 # Set per-feature check compilation flags
66 FEATURE_CHECK_CFLAGS-libunwind = $(LIBUNWIND_CFLAGS)
67 FEATURE_CHECK_LDFLAGS-libunwind = $(LIBUNWIND_LDFLAGS)
68 FEATURE_CHECK_CFLAGS-libunwind-debug-frame = $(LIBUNWIND_CFLAGS)
69 FEATURE_CHECK_LDFLAGS-libunwind-debug-frame = $(LIBUNWIND_LDFLAGS)
72 ifeq ($(NO_PERF_REGS),0)
73 CFLAGS += -DHAVE_PERF_REGS_SUPPORT
77 # for linking with debug library, run like:
78 # make DEBUG=1 LIBDW_DIR=/opt/libdw/
80 LIBDW_CFLAGS := -I$(LIBDW_DIR)/include
81 LIBDW_LDFLAGS := -L$(LIBDW_DIR)/lib
83 FEATURE_CHECK_CFLAGS-libdw-dwarf-unwind := $(LIBDW_CFLAGS)
84 FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind := $(LIBDW_LDFLAGS) -ldw
87 # include ARCH specific config
88 -include $(src-perf)/arch/$(ARCH)/Makefile
90 include $(src-perf)/config/utilities.mak
92 ifeq ($(call get-executable,$(FLEX)),)
93 dummy := $(error Error: $(FLEX) is missing on this system, please install it)
96 ifeq ($(call get-executable,$(BISON)),)
97 dummy := $(error Error: $(BISON) is missing on this system, please install it)
100 # Treat warnings as errors unless directed not to
114 PARSER_DEBUG_BISON := -t
115 PARSER_DEBUG_FLEX := -d
116 CFLAGS += -DPARSER_DEBUG
120 # Try different combinations to accommodate systems that only have
121 # python[2][-config] in weird combinations but always preferring
122 # python2 and python2-config as per pep-0394. If we catch a
123 # python[-config] in version 3, the version check will kill it.
124 PYTHON2 := $(if $(call get-executable,python2),python2,python)
125 override PYTHON := $(call get-executable-or-default,PYTHON,$(PYTHON2))
127 $(if $(call get-executable,$(PYTHON)-config),$(PYTHON)-config,python-config)
128 override PYTHON_CONFIG := \
129 $(call get-executable-or-default,PYTHON_CONFIG,$(PYTHON2_CONFIG))
131 PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))
133 PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
134 PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
136 FEATURE_CHECK_CFLAGS-libpython := $(PYTHON_EMBED_CCOPTS)
137 FEATURE_CHECK_LDFLAGS-libpython := $(PYTHON_EMBED_LDOPTS)
138 FEATURE_CHECK_CFLAGS-libpython-version := $(PYTHON_EMBED_CCOPTS)
139 FEATURE_CHECK_LDFLAGS-libpython-version := $(PYTHON_EMBED_LDOPTS)
142 CFLAGS += -fno-omit-frame-pointer
144 CFLAGS += -funwind-tables
149 # Enforce a non-executable stack, as we may regress (again) in the future by
150 # adding assembler files missing the .GNU-stack linker note.
151 LDFLAGS += -Wl,-z,noexecstack
153 EXTLIBS = -lpthread -lrt -lm -ldl
156 OUTPUT_FEATURES = $(OUTPUT)config/feature-checks/
157 $(shell mkdir -p $(OUTPUT_FEATURES))
160 feature_check = $(eval $(feature_check_code))
161 define feature_check_code
162 feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C config/feature-checks test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0)
165 feature_set = $(eval $(feature_set_code))
166 define feature_set_code
171 # Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
175 # Note that this is not a complete list of all feature tests, just
176 # those that are typically built on a fully configured system.
178 # [ Feature tests not mentioned here have to be built explicitly in
179 # the rule that uses them - an example for that is the 'bionic'
182 CORE_FEATURE_TESTS = \
186 sync-compare-and-swap \
201 pthread-attr-setaffinity-np \
207 LIB_FEATURE_TESTS = \
225 sync-compare-and-swap \
230 pthread-attr-setaffinity-np \
233 libunwind-debug-frame \
241 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all CORE_FEATURE_TESTS features.
242 # If in the future we need per-feature checks/flags for features not
243 # mentioned in this list we need to refactor this ;-).
244 set_test_all_flags = $(eval $(set_test_all_flags_code))
245 define set_test_all_flags_code
246 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1))
247 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
250 $(foreach feat,$(CORE_FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
253 # Special fast-path for the 'all features are available' case:
255 $(call feature_check,all,$(MSG))
258 # Just in case the build freshly failed, make sure we print the
261 ifeq ($(feature-all), 1)
263 # test-all.c passed - just set all the core feature flags to 1:
265 $(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_set,$(feat)))
267 $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS)" LDFLAGS=$(LDFLAGS) -i -j -C config/feature-checks $(addsuffix .bin,$(CORE_FEATURE_TESTS)) >/dev/null 2>&1)
268 $(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_check,$(feat)))
271 ifeq ($(feature-stackprotector-all), 1)
272 CFLAGS += -fstack-protector-all
276 ifeq ($(feature-fortify-source), 1)
277 CFLAGS += -D_FORTIFY_SOURCE=2
281 CFLAGS += -I$(src-perf)/util/include
282 CFLAGS += -I$(src-perf)/arch/$(ARCH)/include
283 CFLAGS += -I$(srctree)/tools/include/
284 CFLAGS += -I$(srctree)/arch/$(ARCH)/include/uapi
285 CFLAGS += -I$(srctree)/arch/$(ARCH)/include
286 CFLAGS += -I$(srctree)/include/uapi
287 CFLAGS += -I$(srctree)/include
289 # $(obj-perf) for generated common-cmds.h
290 # $(obj-perf)/util for generated bison/flex headers
292 CFLAGS += -I$(obj-perf)/util
293 CFLAGS += -I$(obj-perf)
296 CFLAGS += -I$(src-perf)/util
297 CFLAGS += -I$(src-perf)
298 CFLAGS += -I$(LIB_INCLUDE)
300 CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
302 ifeq ($(feature-sync-compare-and-swap), 1)
303 CFLAGS += -DHAVE_SYNC_COMPARE_AND_SWAP_SUPPORT
306 ifeq ($(feature-pthread-attr-setaffinity-np), 1)
307 CFLAGS += -DHAVE_PTHREAD_ATTR_SETAFFINITY_NP
311 $(call feature_check,bionic)
312 ifeq ($(feature-bionic), 1)
314 EXTLIBS := $(filter-out -lrt,$(EXTLIBS))
315 EXTLIBS := $(filter-out -lpthread,$(EXTLIBS))
323 NO_LIBDW_DWARF_UNWIND := 1
325 ifeq ($(feature-libelf), 0)
326 ifeq ($(feature-glibc), 1)
332 ifeq ($(LIBC_SUPPORT),1)
333 msg := $(warning No libelf found, disables 'probe' tool, please install elfutils-libelf-devel/libelf-dev);
339 NO_LIBDW_DWARF_UNWIND := 1
341 ifneq ($(filter s% -static%,$(LDFLAGS),),)
342 msg := $(error No static glibc found, please install glibc-static);
344 msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]);
348 ifndef NO_LIBDW_DWARF_UNWIND
349 ifneq ($(feature-libdw-dwarf-unwind),1)
350 NO_LIBDW_DWARF_UNWIND := 1
351 msg := $(warning No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR);
354 ifneq ($(feature-dwarf), 1)
355 msg := $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev);
357 endif # Dwarf support
358 endif # libelf support
362 CFLAGS += -DHAVE_LIBELF_SUPPORT
365 ifeq ($(feature-libelf-mmap), 1)
366 CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT
369 ifeq ($(feature-libelf-getphdrnum), 1)
370 CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT
373 # include ARCH specific config
374 -include $(src-perf)/arch/$(ARCH)/Makefile
377 ifeq ($(origin PERF_HAVE_DWARF_REGS), undefined)
378 msg := $(warning DWARF register mappings have not been defined for architecture $(ARCH), DWARF support disabled);
381 CFLAGS += -DHAVE_DWARF_SUPPORT $(LIBDW_CFLAGS)
382 LDFLAGS += $(LIBDW_LDFLAGS)
384 endif # PERF_HAVE_DWARF_REGS
388 ifeq ($(ARCH),powerpc)
390 CFLAGS += -DHAVE_SKIP_CALLCHAIN_IDX
395 ifneq ($(feature-libunwind), 1)
396 msg := $(warning No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR);
401 dwarf-post-unwind := 1
402 dwarf-post-unwind-text := BUG
404 # setup DWARF post unwinder
406 ifdef NO_LIBDW_DWARF_UNWIND
407 msg := $(warning Disabling post unwind, no support found.);
408 dwarf-post-unwind := 0
410 dwarf-post-unwind-text := libdw
413 dwarf-post-unwind-text := libunwind
414 # Enable libunwind support by default.
415 ifndef NO_LIBDW_DWARF_UNWIND
416 NO_LIBDW_DWARF_UNWIND := 1
420 ifeq ($(dwarf-post-unwind),1)
421 CFLAGS += -DHAVE_DWARF_UNWIND_SUPPORT
427 ifeq ($(ARCH),$(filter $(ARCH),arm arm64))
428 $(call feature_check,libunwind-debug-frame)
429 ifneq ($(feature-libunwind-debug-frame), 1)
430 msg := $(warning No debug_frame support found in libunwind);
431 CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
434 # non-ARM has no dwarf_find_debug_frame() function:
435 CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
437 CFLAGS += -DHAVE_LIBUNWIND_SUPPORT
438 EXTLIBS += $(LIBUNWIND_LIBS)
439 CFLAGS += $(LIBUNWIND_CFLAGS)
440 LDFLAGS += $(LIBUNWIND_LDFLAGS)
444 ifneq ($(feature-libaudit), 1)
445 msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
448 CFLAGS += -DHAVE_LIBAUDIT_SUPPORT
458 ifneq ($(feature-libslang), 1)
459 msg := $(warning slang not found, disables TUI support. Please install slang-devel or libslang-dev);
462 # Fedora has /usr/include/slang/slang.h, but ubuntu /usr/include/slang.h
463 CFLAGS += -I/usr/include/slang
464 CFLAGS += -DHAVE_SLANG_SUPPORT
470 FLAGS_GTK2=$(CFLAGS) $(LDFLAGS) $(EXTLIBS) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)
471 ifneq ($(feature-gtk2), 1)
472 msg := $(warning GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev);
475 ifeq ($(feature-gtk2-infobar), 1)
476 GTK_CFLAGS := -DHAVE_GTK_INFO_BAR_SUPPORT
478 CFLAGS += -DHAVE_GTK2_SUPPORT
479 GTK_CFLAGS += $(shell $(PKG_CONFIG) --cflags gtk+-2.0 2>/dev/null)
480 GTK_LIBS := $(shell $(PKG_CONFIG) --libs gtk+-2.0 2>/dev/null)
485 grep-libs = $(filter -l%,$(1))
486 strip-libs = $(filter-out -l%,$(1))
489 CFLAGS += -DNO_LIBPERL
491 PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
492 PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
493 PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
494 PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
495 FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
497 ifneq ($(feature-libperl), 1)
498 CFLAGS += -DNO_LIBPERL
500 msg := $(warning Missing perl devel files. Disabling perl scripting support, consider installing perl-ExtUtils-Embed);
502 LDFLAGS += $(PERL_EMBED_LDFLAGS)
503 EXTLIBS += $(PERL_EMBED_LIBADD)
507 ifeq ($(feature-timerfd), 1)
508 CFLAGS += -DHAVE_TIMERFD_SUPPORT
510 msg := $(warning No timerfd support. Disables 'perf kvm stat live');
513 disable-python = $(eval $(disable-python_code))
514 define disable-python_code
515 CFLAGS += -DNO_LIBPYTHON
516 $(if $(1),$(warning No $(1) was found))
517 $(warning Python support will not be built)
522 $(call disable-python)
526 $(call disable-python,python interpreter)
528 PYTHON_WORD := $(call shell-wordify,$(PYTHON))
531 $(call disable-python,python-config tool)
534 PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))
536 PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
537 PYTHON_EMBED_LDFLAGS := $(call strip-libs,$(PYTHON_EMBED_LDOPTS))
538 PYTHON_EMBED_LIBADD := $(call grep-libs,$(PYTHON_EMBED_LDOPTS))
539 PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
540 FLAGS_PYTHON_EMBED := $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
542 ifneq ($(feature-libpython), 1)
543 $(call disable-python,Python.h (for Python 2.x))
546 ifneq ($(feature-libpython-version), 1)
547 $(warning Python 3 is not yet supported; please set)
548 $(warning PYTHON and/or PYTHON_CONFIG appropriately.)
549 $(warning If you also have Python 2 installed, then)
550 $(warning try something like:)
552 $(warning $(and ,) make PYTHON=python2)
554 $(warning Otherwise, disable Python support entirely:)
556 $(warning $(and ,) make NO_LIBPYTHON=1)
560 LDFLAGS += $(PYTHON_EMBED_LDFLAGS)
561 EXTLIBS += $(PYTHON_EMBED_LIBADD)
562 LANG_BINDINGS += $(obj-perf)python/perf.so
569 ifeq ($(feature-libbfd), 1)
572 # call all detections now so we get correct
573 # status in VF output
574 $(call feature_check,liberty)
575 $(call feature_check,liberty-z)
576 $(call feature_check,cplus-demangle)
578 ifeq ($(feature-liberty), 1)
581 ifeq ($(feature-liberty-z), 1)
582 EXTLIBS += -liberty -lz
588 CFLAGS += -DNO_DEMANGLE
590 ifdef HAVE_CPLUS_DEMANGLE_SUPPORT
592 CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
594 ifneq ($(feature-libbfd), 1)
595 ifneq ($(feature-liberty), 1)
596 ifneq ($(feature-liberty-z), 1)
597 # we dont have neither HAVE_CPLUS_DEMANGLE_SUPPORT
598 # or any of 'bfd iberty z' trinity
599 ifeq ($(feature-cplus-demangle), 1)
601 CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
603 msg := $(warning No bfd.h/libbfd found, install binutils-dev[el]/zlib-static to gain symbol demangling)
604 CFLAGS += -DNO_DEMANGLE
612 ifneq ($(filter -lbfd,$(EXTLIBS)),)
613 CFLAGS += -DHAVE_LIBBFD_SUPPORT
617 ifeq ($(feature-zlib), 1)
618 CFLAGS += -DHAVE_ZLIB_SUPPORT
626 ifeq ($(feature-backtrace), 1)
627 CFLAGS += -DHAVE_BACKTRACE_SUPPORT
632 ifeq ($(feature-libnuma), 0)
633 msg := $(warning No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev);
636 CFLAGS += -DHAVE_LIBNUMA_SUPPORT
641 ifdef HAVE_KVM_STAT_SUPPORT
642 CFLAGS += -DHAVE_KVM_STAT_SUPPORT
645 ifeq (${IS_64_BIT}, 1)
646 ifndef NO_PERF_READ_VDSO32
647 $(call feature_check,compile-32)
648 ifeq ($(feature-compile-32), 1)
649 CFLAGS += -DHAVE_PERF_READ_VDSO32
651 NO_PERF_READ_VDSO32 := 1
654 ifneq (${IS_X86_64}, 1)
655 NO_PERF_READ_VDSOX32 := 1
657 ifndef NO_PERF_READ_VDSOX32
658 $(call feature_check,compile-x32)
659 ifeq ($(feature-compile-x32), 1)
660 CFLAGS += -DHAVE_PERF_READ_VDSOX32
662 NO_PERF_READ_VDSOX32 := 1
666 NO_PERF_READ_VDSO32 := 1
667 NO_PERF_READ_VDSOX32 := 1
670 # Among the variables below, these:
676 # ETC_PERFCONFIG (but not sysconfdir)
677 # can be specified as a relative path some/where/else;
678 # this is interpreted as relative to $(prefix) and "perf" at
679 # runtime figures out where they are based on the path to the executable.
680 # This can help installing the suite in a relocatable way.
682 # Make the path relative to DESTDIR, not to prefix
686 bindir_relative = bin
687 bindir = $(prefix)/$(bindir_relative)
690 perfexecdir = libexec/perf-core
691 sharedir = $(prefix)/share
692 template_dir = share/perf-core/templates
693 htmldir = share/doc/perf-doc
694 ifeq ($(prefix),/usr)
696 ETC_PERFCONFIG = $(sysconfdir)/perfconfig
698 sysconfdir = $(prefix)/etc
699 ETC_PERFCONFIG = etc/perfconfig
702 ifeq ($(IS_X86_64),1)
708 libdir = $(prefix)/$(lib)
710 # Shell quote (do not use $(call) to accommodate ancient setups);
711 ETC_PERFCONFIG_SQ = $(subst ','\'',$(ETC_PERFCONFIG))
712 DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
713 bindir_SQ = $(subst ','\'',$(bindir))
714 mandir_SQ = $(subst ','\'',$(mandir))
715 infodir_SQ = $(subst ','\'',$(infodir))
716 perfexecdir_SQ = $(subst ','\'',$(perfexecdir))
717 template_dir_SQ = $(subst ','\'',$(template_dir))
718 htmldir_SQ = $(subst ','\'',$(htmldir))
719 prefix_SQ = $(subst ','\'',$(prefix))
720 sysconfdir_SQ = $(subst ','\'',$(sysconfdir))
721 libdir_SQ = $(subst ','\'',$(libdir))
723 ifneq ($(filter /%,$(firstword $(perfexecdir))),)
724 perfexec_instdir = $(perfexecdir)
726 perfexec_instdir = $(prefix)/$(perfexecdir)
728 perfexec_instdir_SQ = $(subst ','\'',$(perfexec_instdir))
730 # If we install to $(HOME) we keep the traceevent default:
731 # $(HOME)/.traceevent/plugins
732 # Otherwise we install plugins into the global $(libdir).
734 plugindir=$(libdir)/traceevent/plugins
735 plugindir_SQ= $(subst ','\'',$(plugindir))
739 # Print the result of the feature test:
741 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
743 define feature_print_status_code
744 ifeq ($(feature-$(1)), 1)
745 MSG = $(shell printf '...%30s: [ \033[32mon\033[m ]' $(1))
747 MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
751 feature_print_var = $(eval $(feature_print_var_code)) $(info $(MSG))
752 define feature_print_var_code
753 MSG = $(shell printf '...%30s: %s' $(1) $($(1)))
756 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
757 define feature_print_text_code
758 MSG = $(shell printf '...%30s: %s' $(1) $(2))
761 PERF_FEATURES := $(foreach feat,$(LIB_FEATURE_TESTS),feature-$(feat)($(feature-$(feat))))
762 PERF_FEATURES_FILE := $(shell touch $(OUTPUT)PERF-FEATURES; cat $(OUTPUT)PERF-FEATURES)
764 ifeq ($(dwarf-post-unwind),1)
765 PERF_FEATURES += dwarf-post-unwind($(dwarf-post-unwind-text))
768 # The $(display_lib) controls the default detection message
769 # output. It's set if:
770 # - detected features differes from stored features from
771 # last build (in PERF-FEATURES file)
772 # - one of the $(LIB_FEATURE_TESTS) is not detected
775 ifneq ("$(PERF_FEATURES)","$(PERF_FEATURES_FILE)")
776 $(shell echo "$(PERF_FEATURES)" > $(OUTPUT)PERF-FEATURES)
780 feature_check = $(eval $(feature_check_code))
781 define feature_check_code
782 ifneq ($(feature-$(1)), 1)
787 $(foreach feat,$(LIB_FEATURE_TESTS),$(call feature_check,$(feat)))
794 ifeq ($(display_lib),1)
796 $(info Auto-detecting system features:)
797 $(foreach feat,$(LIB_FEATURE_TESTS),$(call feature_print_status,$(feat),))
799 ifeq ($(dwarf-post-unwind),1)
800 $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text))
804 ifeq ($(display_vf),1)
805 $(foreach feat,$(VF_FEATURE_TESTS),$(call feature_print_status,$(feat),))
807 $(call feature_print_var,prefix)
808 $(call feature_print_var,bindir)
809 $(call feature_print_var,libdir)
810 $(call feature_print_var,sysconfdir)
811 $(call feature_print_var,LIBUNWIND_DIR)
812 $(call feature_print_var,LIBDW_DIR)
815 ifeq ($(display_lib),1)