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_X86_64}, 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 = -lelf -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 \
205 LIB_FEATURE_TESTS = \
222 sync-compare-and-swap \
229 libunwind-debug-frame \
235 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all CORE_FEATURE_TESTS features.
236 # If in the future we need per-feature checks/flags for features not
237 # mentioned in this list we need to refactor this ;-).
238 set_test_all_flags = $(eval $(set_test_all_flags_code))
239 define set_test_all_flags_code
240 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1))
241 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
244 $(foreach feat,$(CORE_FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
247 # Special fast-path for the 'all features are available' case:
249 $(call feature_check,all,$(MSG))
252 # Just in case the build freshly failed, make sure we print the
255 ifeq ($(feature-all), 1)
257 # test-all.c passed - just set all the core feature flags to 1:
259 $(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_set,$(feat)))
261 $(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)
262 $(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_check,$(feat)))
265 ifeq ($(feature-stackprotector-all), 1)
266 CFLAGS += -fstack-protector-all
270 ifeq ($(feature-fortify-source), 1)
271 CFLAGS += -D_FORTIFY_SOURCE=2
275 CFLAGS += -I$(src-perf)/util/include
276 CFLAGS += -I$(src-perf)/arch/$(ARCH)/include
277 CFLAGS += -I$(srctree)/tools/include/
278 CFLAGS += -I$(srctree)/arch/$(ARCH)/include/uapi
279 CFLAGS += -I$(srctree)/arch/$(ARCH)/include
280 CFLAGS += -I$(srctree)/include/uapi
281 CFLAGS += -I$(srctree)/include
283 # $(obj-perf) for generated common-cmds.h
284 # $(obj-perf)/util for generated bison/flex headers
286 CFLAGS += -I$(obj-perf)/util
287 CFLAGS += -I$(obj-perf)
290 CFLAGS += -I$(src-perf)/util
291 CFLAGS += -I$(src-perf)
292 CFLAGS += -I$(LIB_INCLUDE)
294 CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
296 ifeq ($(feature-sync-compare-and-swap), 1)
297 CFLAGS += -DHAVE_SYNC_COMPARE_AND_SWAP_SUPPORT
301 $(call feature_check,bionic)
302 ifeq ($(feature-bionic), 1)
304 EXTLIBS := $(filter-out -lrt,$(EXTLIBS))
305 EXTLIBS := $(filter-out -lpthread,$(EXTLIBS))
313 NO_LIBDW_DWARF_UNWIND := 1
315 ifeq ($(feature-libelf), 0)
316 ifeq ($(feature-glibc), 1)
322 ifeq ($(LIBC_SUPPORT),1)
323 msg := $(warning No libelf found, disables 'probe' tool, please install elfutils-libelf-devel/libelf-dev);
329 NO_LIBDW_DWARF_UNWIND := 1
331 ifneq ($(filter s% -static%,$(LDFLAGS),),)
332 msg := $(error No static glibc found, please install glibc-static);
334 msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]);
338 ifndef NO_LIBDW_DWARF_UNWIND
339 ifneq ($(feature-libdw-dwarf-unwind),1)
340 NO_LIBDW_DWARF_UNWIND := 1
341 msg := $(warning No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR);
344 ifneq ($(feature-dwarf), 1)
345 msg := $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev);
347 endif # Dwarf support
348 endif # libelf support
352 CFLAGS += -DHAVE_LIBELF_SUPPORT
354 ifeq ($(feature-libelf-mmap), 1)
355 CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT
358 ifeq ($(feature-libelf-getphdrnum), 1)
359 CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT
362 # include ARCH specific config
363 -include $(src-perf)/arch/$(ARCH)/Makefile
366 ifeq ($(origin PERF_HAVE_DWARF_REGS), undefined)
367 msg := $(warning DWARF register mappings have not been defined for architecture $(ARCH), DWARF support disabled);
370 CFLAGS += -DHAVE_DWARF_SUPPORT $(LIBDW_CFLAGS)
371 LDFLAGS += $(LIBDW_LDFLAGS)
372 EXTLIBS += -lelf -ldw
373 endif # PERF_HAVE_DWARF_REGS
377 ifeq ($(ARCH),powerpc)
379 CFLAGS += -DHAVE_SKIP_CALLCHAIN_IDX
384 ifneq ($(feature-libunwind), 1)
385 msg := $(warning No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR);
390 dwarf-post-unwind := 1
391 dwarf-post-unwind-text := BUG
393 # setup DWARF post unwinder
395 ifdef NO_LIBDW_DWARF_UNWIND
396 msg := $(warning Disabling post unwind, no support found.);
397 dwarf-post-unwind := 0
399 dwarf-post-unwind-text := libdw
402 dwarf-post-unwind-text := libunwind
403 # Enable libunwind support by default.
404 ifndef NO_LIBDW_DWARF_UNWIND
405 NO_LIBDW_DWARF_UNWIND := 1
409 ifeq ($(dwarf-post-unwind),1)
410 CFLAGS += -DHAVE_DWARF_UNWIND_SUPPORT
416 ifeq ($(ARCH),$(filter $(ARCH),arm arm64))
417 $(call feature_check,libunwind-debug-frame)
418 ifneq ($(feature-libunwind-debug-frame), 1)
419 msg := $(warning No debug_frame support found in libunwind);
420 CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
423 # non-ARM has no dwarf_find_debug_frame() function:
424 CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
426 CFLAGS += -DHAVE_LIBUNWIND_SUPPORT
427 EXTLIBS += $(LIBUNWIND_LIBS)
428 CFLAGS += $(LIBUNWIND_CFLAGS)
429 LDFLAGS += $(LIBUNWIND_LDFLAGS)
433 ifneq ($(feature-libaudit), 1)
434 msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
437 CFLAGS += -DHAVE_LIBAUDIT_SUPPORT
447 ifneq ($(feature-libslang), 1)
448 msg := $(warning slang not found, disables TUI support. Please install slang-devel or libslang-dev);
451 # Fedora has /usr/include/slang/slang.h, but ubuntu /usr/include/slang.h
452 CFLAGS += -I/usr/include/slang
453 CFLAGS += -DHAVE_SLANG_SUPPORT
459 FLAGS_GTK2=$(CFLAGS) $(LDFLAGS) $(EXTLIBS) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)
460 ifneq ($(feature-gtk2), 1)
461 msg := $(warning GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev);
464 ifeq ($(feature-gtk2-infobar), 1)
465 GTK_CFLAGS := -DHAVE_GTK_INFO_BAR_SUPPORT
467 CFLAGS += -DHAVE_GTK2_SUPPORT
468 GTK_CFLAGS += $(shell $(PKG_CONFIG) --cflags gtk+-2.0 2>/dev/null)
469 GTK_LIBS := $(shell $(PKG_CONFIG) --libs gtk+-2.0 2>/dev/null)
474 grep-libs = $(filter -l%,$(1))
475 strip-libs = $(filter-out -l%,$(1))
478 CFLAGS += -DNO_LIBPERL
480 PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
481 PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
482 PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
483 PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
484 FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
486 ifneq ($(feature-libperl), 1)
487 CFLAGS += -DNO_LIBPERL
489 msg := $(warning Missing perl devel files. Disabling perl scripting support, consider installing perl-ExtUtils-Embed);
491 LDFLAGS += $(PERL_EMBED_LDFLAGS)
492 EXTLIBS += $(PERL_EMBED_LIBADD)
496 ifeq ($(feature-timerfd), 1)
497 CFLAGS += -DHAVE_TIMERFD_SUPPORT
499 msg := $(warning No timerfd support. Disables 'perf kvm stat live');
502 disable-python = $(eval $(disable-python_code))
503 define disable-python_code
504 CFLAGS += -DNO_LIBPYTHON
505 $(if $(1),$(warning No $(1) was found))
506 $(warning Python support will not be built)
511 $(call disable-python)
515 $(call disable-python,python interpreter)
517 PYTHON_WORD := $(call shell-wordify,$(PYTHON))
520 $(call disable-python,python-config tool)
523 PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))
525 PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
526 PYTHON_EMBED_LDFLAGS := $(call strip-libs,$(PYTHON_EMBED_LDOPTS))
527 PYTHON_EMBED_LIBADD := $(call grep-libs,$(PYTHON_EMBED_LDOPTS))
528 PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
529 FLAGS_PYTHON_EMBED := $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
531 ifneq ($(feature-libpython), 1)
532 $(call disable-python,Python.h (for Python 2.x))
535 ifneq ($(feature-libpython-version), 1)
536 $(warning Python 3 is not yet supported; please set)
537 $(warning PYTHON and/or PYTHON_CONFIG appropriately.)
538 $(warning If you also have Python 2 installed, then)
539 $(warning try something like:)
541 $(warning $(and ,) make PYTHON=python2)
543 $(warning Otherwise, disable Python support entirely:)
545 $(warning $(and ,) make NO_LIBPYTHON=1)
549 LDFLAGS += $(PYTHON_EMBED_LDFLAGS)
550 EXTLIBS += $(PYTHON_EMBED_LIBADD)
551 LANG_BINDINGS += $(obj-perf)python/perf.so
558 ifeq ($(feature-libbfd), 1)
561 # call all detections now so we get correct
562 # status in VF output
563 $(call feature_check,liberty)
564 $(call feature_check,liberty-z)
565 $(call feature_check,cplus-demangle)
567 ifeq ($(feature-liberty), 1)
570 ifeq ($(feature-liberty-z), 1)
571 EXTLIBS += -liberty -lz
577 CFLAGS += -DNO_DEMANGLE
579 ifdef HAVE_CPLUS_DEMANGLE_SUPPORT
581 CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
583 ifneq ($(feature-libbfd), 1)
584 ifneq ($(feature-liberty), 1)
585 ifneq ($(feature-liberty-z), 1)
586 # we dont have neither HAVE_CPLUS_DEMANGLE_SUPPORT
587 # or any of 'bfd iberty z' trinity
588 ifeq ($(feature-cplus-demangle), 1)
590 CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
592 msg := $(warning No bfd.h/libbfd found, install binutils-dev[el]/zlib-static to gain symbol demangling)
593 CFLAGS += -DNO_DEMANGLE
601 ifneq ($(filter -lbfd,$(EXTLIBS)),)
602 CFLAGS += -DHAVE_LIBBFD_SUPPORT
606 ifeq ($(feature-backtrace), 1)
607 CFLAGS += -DHAVE_BACKTRACE_SUPPORT
612 ifeq ($(feature-libnuma), 0)
613 msg := $(warning No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev);
616 CFLAGS += -DHAVE_LIBNUMA_SUPPORT
621 ifdef HAVE_KVM_STAT_SUPPORT
622 CFLAGS += -DHAVE_KVM_STAT_SUPPORT
625 # Among the variables below, these:
631 # ETC_PERFCONFIG (but not sysconfdir)
632 # can be specified as a relative path some/where/else;
633 # this is interpreted as relative to $(prefix) and "perf" at
634 # runtime figures out where they are based on the path to the executable.
635 # This can help installing the suite in a relocatable way.
637 # Make the path relative to DESTDIR, not to prefix
641 bindir_relative = bin
642 bindir = $(prefix)/$(bindir_relative)
645 perfexecdir = libexec/perf-core
646 sharedir = $(prefix)/share
647 template_dir = share/perf-core/templates
648 htmldir = share/doc/perf-doc
649 ifeq ($(prefix),/usr)
651 ETC_PERFCONFIG = $(sysconfdir)/perfconfig
653 sysconfdir = $(prefix)/etc
654 ETC_PERFCONFIG = etc/perfconfig
657 ifeq ($(IS_X86_64),1)
663 libdir = $(prefix)/$(lib)
665 # Shell quote (do not use $(call) to accommodate ancient setups);
666 ETC_PERFCONFIG_SQ = $(subst ','\'',$(ETC_PERFCONFIG))
667 DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
668 bindir_SQ = $(subst ','\'',$(bindir))
669 mandir_SQ = $(subst ','\'',$(mandir))
670 infodir_SQ = $(subst ','\'',$(infodir))
671 perfexecdir_SQ = $(subst ','\'',$(perfexecdir))
672 template_dir_SQ = $(subst ','\'',$(template_dir))
673 htmldir_SQ = $(subst ','\'',$(htmldir))
674 prefix_SQ = $(subst ','\'',$(prefix))
675 sysconfdir_SQ = $(subst ','\'',$(sysconfdir))
676 libdir_SQ = $(subst ','\'',$(libdir))
678 ifneq ($(filter /%,$(firstword $(perfexecdir))),)
679 perfexec_instdir = $(perfexecdir)
681 perfexec_instdir = $(prefix)/$(perfexecdir)
683 perfexec_instdir_SQ = $(subst ','\'',$(perfexec_instdir))
685 # If we install to $(HOME) we keep the traceevent default:
686 # $(HOME)/.traceevent/plugins
687 # Otherwise we install plugins into the global $(libdir).
689 plugindir=$(libdir)/traceevent/plugins
690 plugindir_SQ= $(subst ','\'',$(plugindir))
694 # Print the result of the feature test:
696 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
698 define feature_print_status_code
699 ifeq ($(feature-$(1)), 1)
700 MSG = $(shell printf '...%30s: [ \033[32mon\033[m ]' $(1))
702 MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
706 feature_print_var = $(eval $(feature_print_var_code)) $(info $(MSG))
707 define feature_print_var_code
708 MSG = $(shell printf '...%30s: %s' $(1) $($(1)))
711 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
712 define feature_print_text_code
713 MSG = $(shell printf '...%30s: %s' $(1) $(2))
716 PERF_FEATURES := $(foreach feat,$(LIB_FEATURE_TESTS),feature-$(feat)($(feature-$(feat))))
717 PERF_FEATURES_FILE := $(shell touch $(OUTPUT)PERF-FEATURES; cat $(OUTPUT)PERF-FEATURES)
719 ifeq ($(dwarf-post-unwind),1)
720 PERF_FEATURES += dwarf-post-unwind($(dwarf-post-unwind-text))
723 # The $(display_lib) controls the default detection message
724 # output. It's set if:
725 # - detected features differes from stored features from
726 # last build (in PERF-FEATURES file)
727 # - one of the $(LIB_FEATURE_TESTS) is not detected
730 ifneq ("$(PERF_FEATURES)","$(PERF_FEATURES_FILE)")
731 $(shell echo "$(PERF_FEATURES)" > $(OUTPUT)PERF-FEATURES)
735 feature_check = $(eval $(feature_check_code))
736 define feature_check_code
737 ifneq ($(feature-$(1)), 1)
742 $(foreach feat,$(LIB_FEATURE_TESTS),$(call feature_check,$(feat)))
749 ifeq ($(display_lib),1)
751 $(info Auto-detecting system features:)
752 $(foreach feat,$(LIB_FEATURE_TESTS),$(call feature_print_status,$(feat),))
754 ifeq ($(dwarf-post-unwind),1)
755 $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text))
759 ifeq ($(display_vf),1)
760 $(foreach feat,$(VF_FEATURE_TESTS),$(call feature_print_status,$(feat),))
762 $(call feature_print_var,prefix)
763 $(call feature_print_var,bindir)
764 $(call feature_print_var,libdir)
765 $(call feature_print_var,sysconfdir)
766 $(call feature_print_var,LIBUNWIND_DIR)
767 $(call feature_print_var,LIBDW_DIR)
770 ifeq ($(display_lib),1)