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 $(ARCH),x86 arm))
48 NO_LIBDW_DWARF_UNWIND := 1
51 ifeq ($(ARCH),powerpc)
52 CFLAGS += -DHAVE_SKIP_CALLCHAIN_IDX
55 ifeq ($(LIBUNWIND_LIBS),)
59 # For linking with debug library, run like:
61 # make DEBUG=1 LIBUNWIND_DIR=/opt/libunwind/
64 LIBUNWIND_CFLAGS = -I$(LIBUNWIND_DIR)/include
65 LIBUNWIND_LDFLAGS = -L$(LIBUNWIND_DIR)/lib
67 LIBUNWIND_LDFLAGS += $(LIBUNWIND_LIBS)
69 # Set per-feature check compilation flags
70 FEATURE_CHECK_CFLAGS-libunwind = $(LIBUNWIND_CFLAGS)
71 FEATURE_CHECK_LDFLAGS-libunwind = $(LIBUNWIND_LDFLAGS)
72 FEATURE_CHECK_CFLAGS-libunwind-debug-frame = $(LIBUNWIND_CFLAGS)
73 FEATURE_CHECK_LDFLAGS-libunwind-debug-frame = $(LIBUNWIND_LDFLAGS)
76 ifeq ($(NO_PERF_REGS),0)
77 CFLAGS += -DHAVE_PERF_REGS_SUPPORT
81 # for linking with debug library, run like:
82 # make DEBUG=1 LIBDW_DIR=/opt/libdw/
84 LIBDW_CFLAGS := -I$(LIBDW_DIR)/include
85 LIBDW_LDFLAGS := -L$(LIBDW_DIR)/lib
87 FEATURE_CHECK_CFLAGS-libdw-dwarf-unwind := $(LIBDW_CFLAGS)
88 FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind := $(LIBDW_LDFLAGS) -ldw
91 # include ARCH specific config
92 -include $(src-perf)/arch/$(ARCH)/Makefile
94 include $(src-perf)/config/utilities.mak
96 ifeq ($(call get-executable,$(FLEX)),)
97 dummy := $(error Error: $(FLEX) is missing on this system, please install it)
100 ifeq ($(call get-executable,$(BISON)),)
101 dummy := $(error Error: $(BISON) is missing on this system, please install it)
104 # Treat warnings as errors unless directed not to
118 PARSER_DEBUG_BISON := -t
119 PARSER_DEBUG_FLEX := -d
120 CFLAGS += -DPARSER_DEBUG
124 # Try different combinations to accommodate systems that only have
125 # python[2][-config] in weird combinations but always preferring
126 # python2 and python2-config as per pep-0394. If we catch a
127 # python[-config] in version 3, the version check will kill it.
128 PYTHON2 := $(if $(call get-executable,python2),python2,python)
129 override PYTHON := $(call get-executable-or-default,PYTHON,$(PYTHON2))
131 $(if $(call get-executable,$(PYTHON)-config),$(PYTHON)-config,python-config)
132 override PYTHON_CONFIG := \
133 $(call get-executable-or-default,PYTHON_CONFIG,$(PYTHON2_CONFIG))
135 PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))
137 PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
138 PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
140 FEATURE_CHECK_CFLAGS-libpython := $(PYTHON_EMBED_CCOPTS)
141 FEATURE_CHECK_LDFLAGS-libpython := $(PYTHON_EMBED_LDOPTS)
142 FEATURE_CHECK_CFLAGS-libpython-version := $(PYTHON_EMBED_CCOPTS)
143 FEATURE_CHECK_LDFLAGS-libpython-version := $(PYTHON_EMBED_LDOPTS)
146 CFLAGS += -fno-omit-frame-pointer
148 CFLAGS += -funwind-tables
153 # Enforce a non-executable stack, as we may regress (again) in the future by
154 # adding assembler files missing the .GNU-stack linker note.
155 LDFLAGS += -Wl,-z,noexecstack
157 EXTLIBS = -lelf -lpthread -lrt -lm -ldl
160 OUTPUT_FEATURES = $(OUTPUT)config/feature-checks/
161 $(shell mkdir -p $(OUTPUT_FEATURES))
164 feature_check = $(eval $(feature_check_code))
165 define feature_check_code
166 feature-$(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)
169 feature_set = $(eval $(feature_set_code))
170 define feature_set_code
175 # Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
179 # Note that this is not a complete list of all feature tests, just
180 # those that are typically built on a fully configured system.
182 # [ Feature tests not mentioned here have to be built explicitly in
183 # the rule that uses them - an example for that is the 'bionic'
186 CORE_FEATURE_TESTS = \
190 sync-compare-and-swap \
209 LIB_FEATURE_TESTS = \
226 sync-compare-and-swap \
233 libunwind-debug-frame \
239 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all CORE_FEATURE_TESTS features.
240 # If in the future we need per-feature checks/flags for features not
241 # mentioned in this list we need to refactor this ;-).
242 set_test_all_flags = $(eval $(set_test_all_flags_code))
243 define set_test_all_flags_code
244 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1))
245 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
248 $(foreach feat,$(CORE_FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
251 # Special fast-path for the 'all features are available' case:
253 $(call feature_check,all,$(MSG))
256 # Just in case the build freshly failed, make sure we print the
259 ifeq ($(feature-all), 1)
261 # test-all.c passed - just set all the core feature flags to 1:
263 $(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_set,$(feat)))
265 $(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)
266 $(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_check,$(feat)))
269 ifeq ($(feature-stackprotector-all), 1)
270 CFLAGS += -fstack-protector-all
274 ifeq ($(feature-fortify-source), 1)
275 CFLAGS += -D_FORTIFY_SOURCE=2
279 CFLAGS += -I$(src-perf)/util/include
280 CFLAGS += -I$(src-perf)/arch/$(ARCH)/include
281 CFLAGS += -I$(srctree)/tools/include/
282 CFLAGS += -I$(srctree)/arch/$(ARCH)/include/uapi
283 CFLAGS += -I$(srctree)/arch/$(ARCH)/include
284 CFLAGS += -I$(srctree)/include/uapi
285 CFLAGS += -I$(srctree)/include
287 # $(obj-perf) for generated common-cmds.h
288 # $(obj-perf)/util for generated bison/flex headers
290 CFLAGS += -I$(obj-perf)/util
291 CFLAGS += -I$(obj-perf)
294 CFLAGS += -I$(src-perf)/util
295 CFLAGS += -I$(src-perf)
296 CFLAGS += -I$(LIB_INCLUDE)
298 CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
300 ifeq ($(feature-sync-compare-and-swap), 1)
301 CFLAGS += -DHAVE_SYNC_COMPARE_AND_SWAP_SUPPORT
305 $(call feature_check,bionic)
306 ifeq ($(feature-bionic), 1)
308 EXTLIBS := $(filter-out -lrt,$(EXTLIBS))
309 EXTLIBS := $(filter-out -lpthread,$(EXTLIBS))
317 NO_LIBDW_DWARF_UNWIND := 1
319 ifeq ($(feature-libelf), 0)
320 ifeq ($(feature-glibc), 1)
326 ifeq ($(LIBC_SUPPORT),1)
327 msg := $(warning No libelf found, disables 'probe' tool, please install elfutils-libelf-devel/libelf-dev);
333 NO_LIBDW_DWARF_UNWIND := 1
335 ifneq ($(filter s% -static%,$(LDFLAGS),),)
336 msg := $(error No static glibc found, please install glibc-static);
338 msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]);
342 ifndef NO_LIBDW_DWARF_UNWIND
343 ifneq ($(feature-libdw-dwarf-unwind),1)
344 NO_LIBDW_DWARF_UNWIND := 1
345 msg := $(warning No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR);
348 ifneq ($(feature-dwarf), 1)
349 msg := $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev);
351 endif # Dwarf support
352 endif # libelf support
356 CFLAGS += -DHAVE_LIBELF_SUPPORT
358 ifeq ($(feature-libelf-mmap), 1)
359 CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT
362 ifeq ($(feature-libelf-getphdrnum), 1)
363 CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT
366 # include ARCH specific config
367 -include $(src-perf)/arch/$(ARCH)/Makefile
370 ifeq ($(origin PERF_HAVE_DWARF_REGS), undefined)
371 msg := $(warning DWARF register mappings have not been defined for architecture $(ARCH), DWARF support disabled);
374 CFLAGS += -DHAVE_DWARF_SUPPORT $(LIBDW_CFLAGS)
375 LDFLAGS += $(LIBDW_LDFLAGS)
376 EXTLIBS += -lelf -ldw
377 endif # PERF_HAVE_DWARF_REGS
382 ifneq ($(feature-libunwind), 1)
383 msg := $(warning No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR);
388 dwarf-post-unwind := 1
389 dwarf-post-unwind-text := BUG
391 # setup DWARF post unwinder
393 ifdef NO_LIBDW_DWARF_UNWIND
394 msg := $(warning Disabling post unwind, no support found.);
395 dwarf-post-unwind := 0
397 dwarf-post-unwind-text := libdw
400 dwarf-post-unwind-text := libunwind
401 # Enable libunwind support by default.
402 ifndef NO_LIBDW_DWARF_UNWIND
403 NO_LIBDW_DWARF_UNWIND := 1
407 ifeq ($(dwarf-post-unwind),1)
408 CFLAGS += -DHAVE_DWARF_UNWIND_SUPPORT
414 ifeq ($(ARCH),$(filter $(ARCH),arm arm64))
415 $(call feature_check,libunwind-debug-frame)
416 ifneq ($(feature-libunwind-debug-frame), 1)
417 msg := $(warning No debug_frame support found in libunwind);
418 CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
421 # non-ARM has no dwarf_find_debug_frame() function:
422 CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
424 CFLAGS += -DHAVE_LIBUNWIND_SUPPORT
425 EXTLIBS += $(LIBUNWIND_LIBS)
426 CFLAGS += $(LIBUNWIND_CFLAGS)
427 LDFLAGS += $(LIBUNWIND_LDFLAGS)
431 ifneq ($(feature-libaudit), 1)
432 msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
435 CFLAGS += -DHAVE_LIBAUDIT_SUPPORT
445 ifneq ($(feature-libslang), 1)
446 msg := $(warning slang not found, disables TUI support. Please install slang-devel or libslang-dev);
449 # Fedora has /usr/include/slang/slang.h, but ubuntu /usr/include/slang.h
450 CFLAGS += -I/usr/include/slang
451 CFLAGS += -DHAVE_SLANG_SUPPORT
457 FLAGS_GTK2=$(CFLAGS) $(LDFLAGS) $(EXTLIBS) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)
458 ifneq ($(feature-gtk2), 1)
459 msg := $(warning GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev);
462 ifeq ($(feature-gtk2-infobar), 1)
463 GTK_CFLAGS := -DHAVE_GTK_INFO_BAR_SUPPORT
465 CFLAGS += -DHAVE_GTK2_SUPPORT
466 GTK_CFLAGS += $(shell $(PKG_CONFIG) --cflags gtk+-2.0 2>/dev/null)
467 GTK_LIBS := $(shell $(PKG_CONFIG) --libs gtk+-2.0 2>/dev/null)
472 grep-libs = $(filter -l%,$(1))
473 strip-libs = $(filter-out -l%,$(1))
476 CFLAGS += -DNO_LIBPERL
478 PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
479 PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
480 PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
481 PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
482 FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
484 ifneq ($(feature-libperl), 1)
485 CFLAGS += -DNO_LIBPERL
487 msg := $(warning Missing perl devel files. Disabling perl scripting support, consider installing perl-ExtUtils-Embed);
489 LDFLAGS += $(PERL_EMBED_LDFLAGS)
490 EXTLIBS += $(PERL_EMBED_LIBADD)
494 ifeq ($(feature-timerfd), 1)
495 CFLAGS += -DHAVE_TIMERFD_SUPPORT
497 msg := $(warning No timerfd support. Disables 'perf kvm stat live');
500 disable-python = $(eval $(disable-python_code))
501 define disable-python_code
502 CFLAGS += -DNO_LIBPYTHON
503 $(if $(1),$(warning No $(1) was found))
504 $(warning Python support will not be built)
509 $(call disable-python)
513 $(call disable-python,python interpreter)
515 PYTHON_WORD := $(call shell-wordify,$(PYTHON))
518 $(call disable-python,python-config tool)
521 PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))
523 PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
524 PYTHON_EMBED_LDFLAGS := $(call strip-libs,$(PYTHON_EMBED_LDOPTS))
525 PYTHON_EMBED_LIBADD := $(call grep-libs,$(PYTHON_EMBED_LDOPTS))
526 PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
527 FLAGS_PYTHON_EMBED := $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
529 ifneq ($(feature-libpython), 1)
530 $(call disable-python,Python.h (for Python 2.x))
533 ifneq ($(feature-libpython-version), 1)
534 $(warning Python 3 is not yet supported; please set)
535 $(warning PYTHON and/or PYTHON_CONFIG appropriately.)
536 $(warning If you also have Python 2 installed, then)
537 $(warning try something like:)
539 $(warning $(and ,) make PYTHON=python2)
541 $(warning Otherwise, disable Python support entirely:)
543 $(warning $(and ,) make NO_LIBPYTHON=1)
547 LDFLAGS += $(PYTHON_EMBED_LDFLAGS)
548 EXTLIBS += $(PYTHON_EMBED_LIBADD)
549 LANG_BINDINGS += $(obj-perf)python/perf.so
556 ifeq ($(feature-libbfd), 1)
559 # call all detections now so we get correct
560 # status in VF output
561 $(call feature_check,liberty)
562 $(call feature_check,liberty-z)
563 $(call feature_check,cplus-demangle)
565 ifeq ($(feature-liberty), 1)
568 ifeq ($(feature-liberty-z), 1)
569 EXTLIBS += -liberty -lz
575 CFLAGS += -DNO_DEMANGLE
577 ifdef HAVE_CPLUS_DEMANGLE_SUPPORT
579 CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
581 ifneq ($(feature-libbfd), 1)
582 ifneq ($(feature-liberty), 1)
583 ifneq ($(feature-liberty-z), 1)
584 # we dont have neither HAVE_CPLUS_DEMANGLE_SUPPORT
585 # or any of 'bfd iberty z' trinity
586 ifeq ($(feature-cplus-demangle), 1)
588 CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
590 msg := $(warning No bfd.h/libbfd found, install binutils-dev[el]/zlib-static to gain symbol demangling)
591 CFLAGS += -DNO_DEMANGLE
599 ifneq ($(filter -lbfd,$(EXTLIBS)),)
600 CFLAGS += -DHAVE_LIBBFD_SUPPORT
604 ifeq ($(feature-backtrace), 1)
605 CFLAGS += -DHAVE_BACKTRACE_SUPPORT
610 ifeq ($(feature-libnuma), 0)
611 msg := $(warning No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev);
614 CFLAGS += -DHAVE_LIBNUMA_SUPPORT
619 ifdef HAVE_KVM_STAT_SUPPORT
620 CFLAGS += -DHAVE_KVM_STAT_SUPPORT
623 # Among the variables below, these:
629 # ETC_PERFCONFIG (but not sysconfdir)
630 # can be specified as a relative path some/where/else;
631 # this is interpreted as relative to $(prefix) and "perf" at
632 # runtime figures out where they are based on the path to the executable.
633 # This can help installing the suite in a relocatable way.
635 # Make the path relative to DESTDIR, not to prefix
639 bindir_relative = bin
640 bindir = $(prefix)/$(bindir_relative)
643 perfexecdir = libexec/perf-core
644 sharedir = $(prefix)/share
645 template_dir = share/perf-core/templates
646 htmldir = share/doc/perf-doc
647 ifeq ($(prefix),/usr)
649 ETC_PERFCONFIG = $(sysconfdir)/perfconfig
651 sysconfdir = $(prefix)/etc
652 ETC_PERFCONFIG = etc/perfconfig
654 ifeq ($(IS_X86_64),1)
659 libdir = $(prefix)/$(lib)
661 # Shell quote (do not use $(call) to accommodate ancient setups);
662 ETC_PERFCONFIG_SQ = $(subst ','\'',$(ETC_PERFCONFIG))
663 DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
664 bindir_SQ = $(subst ','\'',$(bindir))
665 mandir_SQ = $(subst ','\'',$(mandir))
666 infodir_SQ = $(subst ','\'',$(infodir))
667 perfexecdir_SQ = $(subst ','\'',$(perfexecdir))
668 template_dir_SQ = $(subst ','\'',$(template_dir))
669 htmldir_SQ = $(subst ','\'',$(htmldir))
670 prefix_SQ = $(subst ','\'',$(prefix))
671 sysconfdir_SQ = $(subst ','\'',$(sysconfdir))
672 libdir_SQ = $(subst ','\'',$(libdir))
674 ifneq ($(filter /%,$(firstword $(perfexecdir))),)
675 perfexec_instdir = $(perfexecdir)
677 perfexec_instdir = $(prefix)/$(perfexecdir)
679 perfexec_instdir_SQ = $(subst ','\'',$(perfexec_instdir))
681 # If we install to $(HOME) we keep the traceevent default:
682 # $(HOME)/.traceevent/plugins
683 # Otherwise we install plugins into the global $(libdir).
685 plugindir=$(libdir)/traceevent/plugins
686 plugindir_SQ= $(subst ','\'',$(plugindir))
690 # Print the result of the feature test:
692 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
694 define feature_print_status_code
695 ifeq ($(feature-$(1)), 1)
696 MSG = $(shell printf '...%30s: [ \033[32mon\033[m ]' $(1))
698 MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
702 feature_print_var = $(eval $(feature_print_var_code)) $(info $(MSG))
703 define feature_print_var_code
704 MSG = $(shell printf '...%30s: %s' $(1) $($(1)))
707 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
708 define feature_print_text_code
709 MSG = $(shell printf '...%30s: %s' $(1) $(2))
712 PERF_FEATURES := $(foreach feat,$(LIB_FEATURE_TESTS),feature-$(feat)($(feature-$(feat))))
713 PERF_FEATURES_FILE := $(shell touch $(OUTPUT)PERF-FEATURES; cat $(OUTPUT)PERF-FEATURES)
715 ifeq ($(dwarf-post-unwind),1)
716 PERF_FEATURES += dwarf-post-unwind($(dwarf-post-unwind-text))
719 # The $(display_lib) controls the default detection message
720 # output. It's set if:
721 # - detected features differes from stored features from
722 # last build (in PERF-FEATURES file)
723 # - one of the $(LIB_FEATURE_TESTS) is not detected
726 ifneq ("$(PERF_FEATURES)","$(PERF_FEATURES_FILE)")
727 $(shell echo "$(PERF_FEATURES)" > $(OUTPUT)PERF-FEATURES)
731 feature_check = $(eval $(feature_check_code))
732 define feature_check_code
733 ifneq ($(feature-$(1)), 1)
738 $(foreach feat,$(LIB_FEATURE_TESTS),$(call feature_check,$(feat)))
745 ifeq ($(display_lib),1)
747 $(info Auto-detecting system features:)
748 $(foreach feat,$(LIB_FEATURE_TESTS),$(call feature_print_status,$(feat),))
750 ifeq ($(dwarf-post-unwind),1)
751 $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text))
755 ifeq ($(display_vf),1)
756 $(foreach feat,$(VF_FEATURE_TESTS),$(call feature_print_status,$(feat),))
758 $(call feature_print_var,prefix)
759 $(call feature_print_var,bindir)
760 $(call feature_print_var,libdir)
761 $(call feature_print_var,sysconfdir)
762 $(call feature_print_var,LIBUNWIND_DIR)
763 $(call feature_print_var,LIBDW_DIR)
766 ifeq ($(display_lib),1)