4.20-stable review patch. If anyone has any objections, please let me know.
------------------
[ Upstream commit 14541b1e7e723859ff2c75c6fc10cdbbec6b8c34 ]
Current libbfd feature test unconditionally links against -liberty and -lz. While it's required on some systems (e.g. opensuse), it's completely unnecessary on the others, where only -lbdf is sufficient (debian). This patch streamlines (and renames) the following feature checks:
feature-libbfd - only link against -lbfd (debian), see commit 2cf9040714f3 ("perf tools: Fix bfd dependency libraries detection") feature-libbfd-liberty - link against -lbfd and -liberty feature-libbfd-liberty-z - link against -lbfd, -liberty and -lz (opensuse), see commit 280e7c48c3b8 ("perf tools: fix BFD detection on opensuse")
(feature-liberty{,-z} were renamed to feature-libbfd-liberty{,z} for clarity)
The main motivation is to fix this feature test for bpftool which is currently broken on debian (libbfd feature shows OFF, but we still unconditionally link against -lbfd and it works).
Tested on debian with only -lbfd installed (without -liberty); I'd appreciate if somebody on the other systems can test this new detection method.
Signed-off-by: Stanislav Fomichev sdf@google.com Acked-by: Jiri Olsa jolsa@kernel.org Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Mathieu Poirier mathieu.poirier@linaro.org Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Link: http://lkml.kernel.org/r/4dfc634cfcfb236883971b5107cf3c28ec8a31be.1542328222... Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/build/Makefile.feature | 4 ++-- tools/build/feature/Makefile | 10 ++++---- tools/perf/Makefile.config | 44 +++++++++++++++++++----------------- 3 files changed, 30 insertions(+), 28 deletions(-)
diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature index d74bb9414d7c..81dda411e9d3 100644 --- a/tools/build/Makefile.feature +++ b/tools/build/Makefile.feature @@ -80,8 +80,8 @@ FEATURE_TESTS_EXTRA := \ cplus-demangle \ hello \ libbabeltrace \ - liberty \ - liberty-z \ + libbfd-liberty \ + libbfd-liberty-z \ libunwind-debug-frame \ libunwind-debug-frame-arm \ libunwind-debug-frame-aarch64 \ diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile index 304b984f11b9..912b82d4b70a 100644 --- a/tools/build/feature/Makefile +++ b/tools/build/feature/Makefile @@ -16,8 +16,8 @@ FILES= \ test-libbfd.bin \ test-disassembler-four-args.bin \ test-reallocarray.bin \ - test-liberty.bin \ - test-liberty-z.bin \ + test-libbfd-liberty.bin \ + test-libbfd-liberty-z.bin \ test-cplus-demangle.bin \ test-libelf.bin \ test-libelf-getphdrnum.bin \ @@ -204,7 +204,7 @@ $(OUTPUT)test-libpython-version.bin: $(BUILD)
$(OUTPUT)test-libbfd.bin: - $(BUILD) -DPACKAGE='"perf"' -lbfd -lz -liberty -ldl + $(BUILD) -DPACKAGE='"perf"' -lbfd -ldl
$(OUTPUT)test-disassembler-four-args.bin: $(BUILD) -DPACKAGE='"perf"' -lbfd -lopcodes @@ -212,10 +212,10 @@ $(OUTPUT)test-disassembler-four-args.bin: $(OUTPUT)test-reallocarray.bin: $(BUILD)
-$(OUTPUT)test-liberty.bin: +$(OUTPUT)test-libbfd-liberty.bin: $(CC) $(CFLAGS) -Wall -Werror -o $@ test-libbfd.c -DPACKAGE='"perf"' $(LDFLAGS) -lbfd -ldl -liberty
-$(OUTPUT)test-liberty-z.bin: +$(OUTPUT)test-libbfd-liberty-z.bin: $(CC) $(CFLAGS) -Wall -Werror -o $@ test-libbfd.c -DPACKAGE='"perf"' $(LDFLAGS) -lbfd -ldl -liberty -lz
$(OUTPUT)test-cplus-demangle.bin: diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index acbb657f7ce2..a0f366c7a318 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -693,18 +693,20 @@ endif
ifeq ($(feature-libbfd), 1) EXTLIBS += -lbfd +else + # we are on a system that requires -liberty and (maybe) -lz + # to link against -lbfd; test each case individually here
# 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) + $(call feature_check,libbfd-liberty) + $(call feature_check,libbfd-liberty-z)
- ifeq ($(feature-liberty), 1) - EXTLIBS += -liberty + ifeq ($(feature-libbfd-liberty), 1) + EXTLIBS += -lbfd -liberty else - ifeq ($(feature-liberty-z), 1) - EXTLIBS += -liberty -lz + ifeq ($(feature-libbfd-liberty-z), 1) + EXTLIBS += -lbfd -liberty -lz endif endif endif @@ -714,24 +716,24 @@ ifdef NO_DEMANGLE else ifdef HAVE_CPLUS_DEMANGLE_SUPPORT EXTLIBS += -liberty - CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT else - ifneq ($(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 := $(warning No bfd.h/libbfd found, please install binutils-dev[el]/zlib-static/libiberty-dev to gain symbol demangling) - CFLAGS += -DNO_DEMANGLE - endif - endif + ifeq ($(filter -liberty,$(EXTLIBS)),) + $(call feature_check,cplus-demangle) + + # we dont have neither HAVE_CPLUS_DEMANGLE_SUPPORT + # or any of 'bfd iberty z' trinity + ifeq ($(feature-cplus-demangle), 1) + EXTLIBS += -liberty + else + msg := $(warning No bfd.h/libbfd found, please install binutils-dev[el]/zlib-static/libiberty-dev to gain symbol demangling) + CFLAGS += -DNO_DEMANGLE endif endif endif + + ifneq ($(filter -liberty,$(EXTLIBS)),) + CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT + endif endif
ifneq ($(filter -lbfd,$(EXTLIBS)),)