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Message-ID: <ZvWmqLVOiTeNUqSu@google.com>
Date: Thu, 26 Sep 2024 11:23:36 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>,
John Garry <john.g.garry@...cle.com>, Will Deacon <will@...nel.org>,
James Clark <james.clark@...aro.org>,
Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>,
Guo Ren <guoren@...nel.org>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>, Nick Terrell <terrelln@...com>,
Guilherme Amadio <amadio@...too.org>,
Changbin Du <changbin.du@...wei.com>,
"Steinar H. Gunderson" <sesse@...gle.com>,
"Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
Aditya Gupta <adityag@...ux.ibm.com>,
Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
Masahiro Yamada <masahiroy@...nel.org>,
Huacai Chen <chenhuacai@...nel.org>, Bibo Mao <maobibo@...ngson.cn>,
Kajol Jain <kjain@...ux.ibm.com>, Anup Patel <anup@...infault.org>,
Shenlin Liang <liangshenlin@...incomputing.com>,
Atish Patra <atishp@...osinc.com>,
Oliver Upton <oliver.upton@...ux.dev>,
Chen Pei <cp0613@...ux.alibaba.com>,
Dima Kogan <dima@...retsauce.net>,
Alexander Lobakin <aleksander.lobakin@...el.com>,
"David S. Miller" <davem@...emloft.net>,
Przemek Kitszel <przemyslaw.kitszel@...el.com>,
linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
Yang Jihong <yangjihong@...edance.com>
Subject: Re: [PATCH v1 03/11] perf build: Rename test-dwarf to test-libdw
On Thu, Sep 26, 2024 at 08:37:51AM -0700, Ian Rogers wrote:
> On Wed, Sep 25, 2024 at 5:28 PM Namhyung Kim <namhyung@...nel.org> wrote:
> >
> > On Tue, Sep 24, 2024 at 09:04:10AM -0700, Ian Rogers wrote:
> > > Be more intention revealing that the dwarf test is actually testing
> > > for libdw support.
> > >
> > > Signed-off-by: Ian Rogers <irogers@...gle.com>
> > > ---
> > > tools/build/Makefile.feature | 6 +++---
> > > tools/build/feature/Makefile | 16 ++++++++--------
> > > tools/build/feature/test-all.c | 6 +++---
> > > .../build/feature/{test-dwarf.c => test-libdw.c} | 0
> > > tools/perf/Makefile.config | 6 +++---
> > > 5 files changed, 17 insertions(+), 17 deletions(-)
> > > rename tools/build/feature/{test-dwarf.c => test-libdw.c} (100%)
> > >
> > > diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
> > > index ffd117135094..6025810cc346 100644
> > > --- a/tools/build/Makefile.feature
> > > +++ b/tools/build/Makefile.feature
> > > @@ -30,7 +30,7 @@ endef
> > > #
> > > FEATURE_TESTS_BASIC := \
> > > backtrace \
> > > - dwarf \
> > > + libdw \
> > > dwarf_getlocations \
> > > dwarf_getcfi \
> > > eventfd \
> > > @@ -120,7 +120,7 @@ ifeq ($(FEATURE_TESTS),all)
> > > endif
> > >
> > > FEATURE_DISPLAY ?= \
> > > - dwarf \
> > > + libdw \
> > > dwarf_getlocations \
> > > glibc \
> > > libbfd \
> > > @@ -233,7 +233,7 @@ endef
> > >
> > > #
> > > # generates feature value assignment for name, like:
> > > -# $(call feature_assign,dwarf) == feature-dwarf=1
> > > +# $(call feature_assign,libdw) == feature-libdw=1
> > > #
> > > feature_assign = feature-$(1)=$(feature-$(1))
> > >
> > > diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
> > > index 5938cf799dc6..bece326ac93b 100644
> > > --- a/tools/build/feature/Makefile
> > > +++ b/tools/build/feature/Makefile
> > > @@ -5,7 +5,7 @@ FILES= \
> > > test-all.bin \
> > > test-backtrace.bin \
> > > test-bionic.bin \
> > > - test-dwarf.bin \
> > > + test-libdw.bin \
> > > test-dwarf_getlocations.bin \
> > > test-dwarf_getcfi.bin \
> > > test-eventfd.bin \
> > > @@ -168,9 +168,9 @@ $(OUTPUT)test-libopencsd.bin:
> > > $(BUILD) # -lopencsd_c_api -lopencsd provided by
> > > # $(FEATURE_CHECK_LDFLAGS-libopencsd)
> > >
> > > -DWARFLIBS := -ldw
> > > +DWLIBS := -ldw
See here and the below changes.
> > > ifeq ($(findstring -static,${LDFLAGS}),-static)
> > > - DWARFLIBS += -lelf -lz -llzma -lbz2 -lzstd
> > > + DWLIBS += -lelf -lz -llzma -lbz2 -lzstd
> > >
> > > LIBDW_VERSION := $(shell $(PKG_CONFIG) --modversion libdw)
> > > LIBDW_VERSION_1 := $(word 1, $(subst ., ,$(LIBDW_VERSION)))
> > > @@ -179,18 +179,18 @@ ifeq ($(findstring -static,${LDFLAGS}),-static)
> > > # Elfutils merged libebl.a into libdw.a starting from version 0.177,
> > > # Link libebl.a only if libdw is older than this version.
> > > ifeq ($(shell test $(LIBDW_VERSION_2) -lt 177; echo $$?),0)
> > > - DWARFLIBS += -lebl
> > > + DWLIBS += -lebl
> > > endif
> > > endif
> > >
> > > -$(OUTPUT)test-dwarf.bin:
> > > - $(BUILD) $(DWARFLIBS)
> > > +$(OUTPUT)test-libdw.bin:
> > > + $(BUILD) $(DWLIBS)
> > >
> > > $(OUTPUT)test-dwarf_getlocations.bin:
> > > - $(BUILD) $(DWARFLIBS)
> > > + $(BUILD) $(DWLIBS)
> > >
> > > $(OUTPUT)test-dwarf_getcfi.bin:
> > > - $(BUILD) $(DWARFLIBS)
> > > + $(BUILD) $(DWLIBS)
> > >
> > > $(OUTPUT)test-libelf-getphdrnum.bin:
> > > $(BUILD) -lelf
> > > diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
> > > index 6f4bf386a3b5..d60e072b6eca 100644
> > > --- a/tools/build/feature/test-all.c
> > > +++ b/tools/build/feature/test-all.c
> > > @@ -38,8 +38,8 @@
> > > # include "test-glibc.c"
> > > #undef main
> > >
> > > -#define main main_test_dwarf
> > > -# include "test-dwarf.c"
> > > +#define main main_test_libdw
> > > +# include "test-libdw.c"
> > > #undef main
> > >
> > > #define main main_test_dwarf_getlocations
> > > @@ -187,7 +187,7 @@ int main(int argc, char *argv[])
> > > main_test_get_current_dir_name();
> > > main_test_gettid();
> > > main_test_glibc();
> > > - main_test_dwarf();
> > > + main_test_libdw();
> > > main_test_dwarf_getlocations();
> > > main_test_eventfd();
> > > main_test_libelf_getphdrnum();
> > > diff --git a/tools/build/feature/test-dwarf.c b/tools/build/feature/test-libdw.c
> > > similarity index 100%
> > > rename from tools/build/feature/test-dwarf.c
> > > rename to tools/build/feature/test-libdw.c
> > > diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> > > index 182e14e39cd5..c8e157cc0c5e 100644
> > > --- a/tools/perf/Makefile.config
> > > +++ b/tools/perf/Makefile.config
> > > @@ -159,8 +159,8 @@ ifeq ($(findstring -static,${LDFLAGS}),-static)
> > > DWARFLIBS += -lebl
> > > endif
> > > endif
> > > -FEATURE_CHECK_CFLAGS-dwarf := $(LIBDW_CFLAGS)
> > > -FEATURE_CHECK_LDFLAGS-dwarf := $(LIBDW_LDFLAGS) $(DWARFLIBS)
> > > +FEATURE_CHECK_CFLAGS-libdw := $(LIBDW_CFLAGS)
> > > +FEATURE_CHECK_LDFLAGS-libdw := $(LIBDW_LDFLAGS) $(DWARFLIBS)
> >
> > s/DWARFLIBS/DWLIBS/ ?
>
> The patch is changing the name of a feature test. It is possible to
> change this Makefile.config variable in the same patch but I think
> they are distinct things and the variable rename is follow up work.
Oh.. you changed it in tools/build/feature/Makefile above but didn't in
tools/perf/Makefile.config. That confused me.. ;-)
Thanks,
Namhyung
> >
> > > FEATURE_CHECK_CFLAGS-libdw-dwarf-unwind := $(LIBDW_CFLAGS)
> > > FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind := $(LIBDW_LDFLAGS) $(DWARFLIBS)
> >
> > Ditto.
> >
> > Thanks,
> > Namhyung
> >
> >
> > > FEATURE_CHECK_CFLAGS-dwarf_getlocations := $(LIBDW_CFLAGS)
> > > @@ -470,7 +470,7 @@ else
> > > $(warning No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR)
> > > endif
> > > endif
> > > - ifneq ($(feature-dwarf), 1)
> > > + ifneq ($(feature-libdw), 1)
> > > ifndef NO_LIBDW
> > > $(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_LIBDW := 1
> > > --
> > > 2.46.0.792.g87dc391469-goog
> > >
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