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Message-ID: <CAM9d7cjQ0wbPu9NWcg_Rj66jcJ=6HoNMcTnfR4wvjaJ47FDVQA@mail.gmail.com> Date: Thu, 22 Feb 2024 09:08:33 -0800 From: Namhyung Kim <namhyung@...nel.org> To: Masahiro Yamada <masahiroy@...nel.org> Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, linux-perf-users@...r.kernel.org, linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, Mark Rutland <mark.rutland@....com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com> Subject: Re: [PATCH] treewide: remove meaningless assignments in Makefiles Hello, On Wed, Feb 21, 2024 at 5:42 AM Masahiro Yamada <masahiroy@...nel.org> wrote: > > In Makefiles, $(error ), $(warning ), and $(info ) expand to the empty > string, as explained in the GNU Make manual [1]: > "The result of the expansion of this function is the empty string." > > Therefore, they are no-op except for logging purposes. > > $(shell ...) expands to the output of the command. It expands to the > empty string when the command does not print anything to stdout. > Hence, $(shell mkdir ...) is no-op except for creating the directory. > > Remove meaningless assignments. > > [1]: https://www.gnu.org/software/make/manual/make.html#Make-Control-Functions > > Signed-off-by: Masahiro Yamada <masahiroy@...nel.org> > --- > > This is a treewide cleanup, but in practice, this is touching mostly > perf Makefiles. I am sending this to perf subsystem. How do you want to route this? I can take it to perf tree if you're ok. Thanks, Namhyung > > > tools/perf/Makefile.config | 90 ++++++++++++++-------------- > tools/perf/Makefile.perf | 4 +- > tools/perf/arch/arm64/Makefile | 2 +- > tools/perf/arch/loongarch/Makefile | 2 +- > tools/perf/arch/mips/Makefile | 2 +- > tools/perf/arch/powerpc/Makefile | 2 +- > tools/perf/arch/s390/Makefile | 2 +- > tools/perf/arch/x86/Makefile | 2 +- > tools/scripts/Makefile.include | 2 +- > tools/testing/selftests/kvm/Makefile | 4 +- > 10 files changed, 56 insertions(+), 56 deletions(-) > > diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config > index aa55850fbc21..6edf9916d41c 100644 > --- a/tools/perf/Makefile.config > +++ b/tools/perf/Makefile.config > @@ -209,11 +209,11 @@ endif > include $(srctree)/tools/scripts/utilities.mak > > ifeq ($(call get-executable,$(FLEX)),) > - dummy := $(error Error: $(FLEX) is missing on this system, please install it) > + $(error Error: $(FLEX) is missing on this system, please install it) > endif > > ifeq ($(call get-executable,$(BISON)),) > - dummy := $(error Error: $(BISON) is missing on this system, please install it) > + $(error Error: $(BISON) is missing on this system, please install it) > endif > > ifneq ($(OUTPUT),) > @@ -438,46 +438,46 @@ else > LIBC_SUPPORT := 1 > endif > ifeq ($(LIBC_SUPPORT),1) > - msg := $(error ERROR: No libelf found. Disables 'probe' tool, jvmti and BPF support. Please install libelf-dev, libelf-devel, elfutils-libelf-devel or build with NO_LIBELF=1.) > + $(error ERROR: No libelf found. Disables 'probe' tool, jvmti and BPF support. Please install libelf-dev, libelf-devel, elfutils-libelf-devel or build with NO_LIBELF=1.) > else > ifneq ($(filter s% -fsanitize=address%,$(EXTRA_CFLAGS),),) > ifneq ($(shell ldconfig -p | grep libasan >/dev/null 2>&1; echo $$?), 0) > - msg := $(error No libasan found, please install libasan); > + $(error No libasan found, please install libasan) > endif > endif > > ifneq ($(filter s% -fsanitize=undefined%,$(EXTRA_CFLAGS),),) > ifneq ($(shell ldconfig -p | grep libubsan >/dev/null 2>&1; echo $$?), 0) > - msg := $(error No libubsan found, please install libubsan); > + $(error No libubsan found, please install libubsan) > endif > endif > > ifneq ($(filter s% -static%,$(LDFLAGS),),) > - msg := $(error No static glibc found, please install glibc-static); > + $(error No static glibc found, please install glibc-static) > else > - msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]); > + $(error No gnu/libc-version.h found, please install glibc-dev[el]) > endif > endif > else > ifndef NO_LIBDW_DWARF_UNWIND > ifneq ($(feature-libdw-dwarf-unwind),1) > NO_LIBDW_DWARF_UNWIND := 1 > - msg := $(warning No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR); > + $(warning No libdw DWARF unwind found, Please install elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR) > endif > endif > ifneq ($(feature-dwarf), 1) > ifndef NO_DWARF > - 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); > + $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev) > NO_DWARF := 1 > endif > else > ifneq ($(feature-dwarf_getlocations), 1) > - msg := $(warning Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157); > + $(warning Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157) > else > CFLAGS += -DHAVE_DWARF_GETLOCATIONS_SUPPORT > endif # dwarf_getlocations > ifneq ($(feature-dwarf_getcfi), 1) > - msg := $(warning Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.142); > + $(warning Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.142) > else > CFLAGS += -DHAVE_DWARF_CFI_SUPPORT > endif # dwarf_getcfi > @@ -525,7 +525,7 @@ ifdef CORESIGHT > endif > endif > else > - dummy := $(error Error: No libopencsd library found or the version is not up-to-date. Please install recent libopencsd to build with CORESIGHT=1) > + $(error Error: No libopencsd library found or the version is not up-to-date. Please install recent libopencsd to build with CORESIGHT=1) > endif > endif > > @@ -551,7 +551,7 @@ ifndef NO_LIBELF > ifeq ($(feature-libelf-gelf_getnote), 1) > CFLAGS += -DHAVE_GELF_GETNOTE_SUPPORT > else > - msg := $(warning gelf_getnote() not found on libelf, SDT support disabled); > + $(warning gelf_getnote() not found on libelf, SDT support disabled) > endif > > ifeq ($(feature-libelf-getshdrstrndx), 1) > @@ -568,7 +568,7 @@ ifndef NO_LIBELF > > ifndef NO_DWARF > ifeq ($(origin PERF_HAVE_DWARF_REGS), undefined) > - msg := $(warning DWARF register mappings have not been defined for architecture $(SRCARCH), DWARF support disabled); > + $(warning DWARF register mappings have not been defined for architecture $(SRCARCH), DWARF support disabled) > NO_DWARF := 1 > else > CFLAGS += -DHAVE_DWARF_SUPPORT $(LIBDW_CFLAGS) > @@ -590,11 +590,11 @@ ifndef NO_LIBELF > $(call detected,CONFIG_LIBBPF) > $(call detected,CONFIG_LIBBPF_DYNAMIC) > else > - dummy := $(error Error: No libbpf devel library found or older than v1.0, please install/update libbpf-devel); > + $(error Error: No libbpf devel library found or older than v1.0, please install/update libbpf-devel) > endif > else > ifeq ($(NO_ZLIB), 1) > - dummy := $(warning Warning: Statically building libbpf not possible as zlib is missing) > + $(warning Warning: Statically building libbpf not possible as zlib is missing) > NO_LIBBPF := 1 > else > # Libbpf will be built as a static library from tools/lib/bpf. > @@ -609,7 +609,7 @@ endif # NO_LIBELF > > ifndef NO_SDT > ifneq ($(feature-sdt), 1) > - msg := $(warning No sys/sdt.h found, no SDT events are defined, please install systemtap-sdt-devel or systemtap-sdt-dev); > + $(warning No sys/sdt.h found, no SDT events are defined, please install systemtap-sdt-devel or systemtap-sdt-dev) > NO_SDT := 1; > else > CFLAGS += -DHAVE_SDT_EVENT > @@ -651,13 +651,13 @@ ifndef NO_LIBUNWIND > have_libunwind = 1 > $(call feature_check,libunwind-debug-frame-aarch64) > ifneq ($(feature-libunwind-debug-frame-aarch64), 1) > - msg := $(warning No debug_frame support found in libunwind-aarch64); > + $(warning No debug_frame support found in libunwind-aarch64) > CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME_AARCH64 > endif > endif > > ifneq ($(feature-libunwind), 1) > - msg := $(warning No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR); > + $(warning No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR) > NO_LOCAL_LIBUNWIND := 1 > else > have_libunwind := 1 > @@ -673,7 +673,7 @@ endif > > ifndef NO_LIBBPF > ifneq ($(feature-bpf), 1) > - msg := $(warning BPF API too old. Please install recent kernel headers. BPF support in 'perf record' is disabled.) > + $(warning BPF API too old. Please install recent kernel headers. BPF support in 'perf record' is disabled.) > NO_LIBBPF := 1 > endif > endif > @@ -686,28 +686,28 @@ endif > > ifeq ($(BUILD_BPF_SKEL),1) > ifeq ($(filter -DHAVE_LIBELF_SUPPORT, $(CFLAGS)),) > - dummy := $(warning Warning: Disabled BPF skeletons as libelf is required by bpftool) > + $(warning Warning: Disabled BPF skeletons as libelf is required by bpftool) > BUILD_BPF_SKEL := 0 > else ifeq ($(filter -DHAVE_ZLIB_SUPPORT, $(CFLAGS)),) > - dummy := $(warning Warning: Disabled BPF skeletons as zlib is required by bpftool) > + $(warning Warning: Disabled BPF skeletons as zlib is required by bpftool) > BUILD_BPF_SKEL := 0 > else ifeq ($(filter -DHAVE_LIBBPF_SUPPORT, $(CFLAGS)),) > - dummy := $(warning Warning: Disabled BPF skeletons as libbpf is required) > + $(warning Warning: Disabled BPF skeletons as libbpf is required) > BUILD_BPF_SKEL := 0 > else ifeq ($(call get-executable,$(CLANG)),) > - dummy := $(warning Warning: Disabled BPF skeletons as clang ($(CLANG)) is missing) > + $(warning Warning: Disabled BPF skeletons as clang ($(CLANG)) is missing) > BUILD_BPF_SKEL := 0 > else > CLANG_VERSION := $(shell $(CLANG) --version | head -1 | sed 's/.*clang version \([[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+\).*/\1/g') > ifeq ($(call version-lt3,$(CLANG_VERSION),12.0.1),1) > - dummy := $(warning Warning: Disabled BPF skeletons as reliable BTF generation needs at least $(CLANG) version 12.0.1) > + $(warning Warning: Disabled BPF skeletons as reliable BTF generation needs at least $(CLANG) version 12.0.1) > BUILD_BPF_SKEL := 0 > endif > endif > ifeq ($(BUILD_BPF_SKEL),1) > $(call feature_check,clang-bpf-co-re) > ifeq ($(feature-clang-bpf-co-re), 0) > - dummy := $(warning Warning: Disabled BPF skeletons as clang is too old) > + $(warning Warning: Disabled BPF skeletons as clang is too old) > BUILD_BPF_SKEL := 0 > endif > endif > @@ -727,7 +727,7 @@ dwarf-post-unwind-text := BUG > # setup DWARF post unwinder > ifdef NO_LIBUNWIND > ifdef NO_LIBDW_DWARF_UNWIND > - msg := $(warning Disabling post unwind, no support found.); > + $(warning Disabling post unwind, no support found.) > dwarf-post-unwind := 0 > else > dwarf-post-unwind-text := libdw > @@ -753,7 +753,7 @@ ifndef NO_LOCAL_LIBUNWIND > ifeq ($(SRCARCH),$(filter $(SRCARCH),arm arm64)) > $(call feature_check,libunwind-debug-frame) > ifneq ($(feature-libunwind-debug-frame), 1) > - msg := $(warning No debug_frame support found in libunwind); > + $(warning No debug_frame support found in libunwind) > CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME > endif > else > @@ -782,7 +782,7 @@ ifneq ($(NO_LIBTRACEEVENT),1) > ifndef NO_LIBAUDIT > $(call feature_check,libaudit) > ifneq ($(feature-libaudit), 1) > - msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev); > + $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev) > NO_LIBAUDIT := 1 > else > CFLAGS += -DHAVE_LIBAUDIT_SUPPORT > @@ -795,7 +795,7 @@ endif > > ifndef NO_LIBCRYPTO > ifneq ($(feature-libcrypto), 1) > - msg := $(warning No libcrypto.h found, disables jitted code injection, please install openssl-devel or libssl-dev); > + $(warning No libcrypto.h found, disables jitted code injection, please install openssl-devel or libssl-dev) > NO_LIBCRYPTO := 1 > else > CFLAGS += -DHAVE_LIBCRYPTO_SUPPORT > @@ -807,7 +807,7 @@ endif > ifndef NO_SLANG > ifneq ($(feature-libslang), 1) > ifneq ($(feature-libslang-include-subdir), 1) > - msg := $(warning slang not found, disables TUI support. Please install slang-devel, libslang-dev or libslang2-dev); > + $(warning slang not found, disables TUI support. Please install slang-devel, libslang-dev or libslang2-dev) > NO_SLANG := 1 > else > CFLAGS += -DHAVE_SLANG_INCLUDE_SUBDIR > @@ -825,7 +825,7 @@ ifdef GTK2 > FLAGS_GTK2=$(CFLAGS) $(LDFLAGS) $(EXTLIBS) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null) > $(call feature_check,gtk2) > ifneq ($(feature-gtk2), 1) > - msg := $(warning GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev); > + $(warning GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev) > NO_GTK2 := 1 > else > $(call feature_check,gtk2-infobar) > @@ -854,7 +854,7 @@ else > ifneq ($(feature-libperl), 1) > CFLAGS += -DNO_LIBPERL > NO_LIBPERL := 1 > - msg := $(warning Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev); > + $(warning Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev) > else > LDFLAGS += $(PERL_EMBED_LDFLAGS) > EXTLIBS += $(PERL_EMBED_LIBADD) > @@ -869,7 +869,7 @@ endif > ifeq ($(feature-timerfd), 1) > CFLAGS += -DHAVE_TIMERFD_SUPPORT > else > - msg := $(warning No timerfd support. Disables 'perf kvm stat live'); > + $(warning No timerfd support. Disables 'perf kvm stat live') > endif > > disable-python = $(eval $(disable-python_code)) > @@ -903,7 +903,7 @@ else > PYTHON_EXTENSION_SUFFIX := $(shell $(PYTHON) -c 'from importlib import machinery; print(machinery.EXTENSION_SUFFIXES[0])') > LANG_BINDINGS += $(obj-perf)python/perf$(PYTHON_EXTENSION_SUFFIX) > else > - msg := $(warning Missing python setuptools, the python binding won't be built, please install python3-setuptools or equivalent); > + $(warning Missing python setuptools, the python binding won't be built, please install python3-setuptools or equivalent) > endif > CFLAGS += -DHAVE_LIBPYTHON_SUPPORT > $(call detected,CONFIG_LIBPYTHON) > @@ -962,7 +962,7 @@ ifdef BUILD_NONDISTRO > ifeq ($(feature-libbfd-buildid), 1) > CFLAGS += -DHAVE_LIBBFD_BUILDID_SUPPORT > else > - msg := $(warning Old version of libbfd/binutils things like PE executable profiling will not be available); > + $(warning Old version of libbfd/binutils things like PE executable profiling will not be available) > endif > endif > > @@ -994,7 +994,7 @@ ifndef NO_LZMA > EXTLIBS += -llzma > $(call detected,CONFIG_LZMA) > else > - msg := $(warning No liblzma found, disables xz kernel module decompression, please install xz-devel/liblzma-dev); > + $(warning No liblzma found, disables xz kernel module decompression, please install xz-devel/liblzma-dev) > NO_LZMA := 1 > endif > endif > @@ -1007,7 +1007,7 @@ ifndef NO_LIBZSTD > EXTLIBS += -lzstd > $(call detected,CONFIG_ZSTD) > else > - msg := $(warning No libzstd found, disables trace compression, please install libzstd-dev[el] and/or set LIBZSTD_DIR); > + $(warning No libzstd found, disables trace compression, please install libzstd-dev[el] and/or set LIBZSTD_DIR) > NO_LIBZSTD := 1 > endif > endif > @@ -1018,7 +1018,7 @@ ifndef NO_LIBCAP > EXTLIBS += -lcap > $(call detected,CONFIG_LIBCAP) > else > - msg := $(warning No libcap found, disables capability support, please install libcap-devel/libcap-dev); > + $(warning No libcap found, disables capability support, please install libcap-devel/libcap-dev) > NO_LIBCAP := 1 > endif > endif > @@ -1031,11 +1031,11 @@ endif > > ifndef NO_LIBNUMA > ifeq ($(feature-libnuma), 0) > - msg := $(warning No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev); > + $(warning No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev) > NO_LIBNUMA := 1 > else > ifeq ($(feature-numa_num_possible_cpus), 0) > - msg := $(warning Old numa library found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev >= 2.0.8); > + $(warning Old numa library found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev >= 2.0.8) > NO_LIBNUMA := 1 > else > CFLAGS += -DHAVE_LIBNUMA_SUPPORT > @@ -1090,14 +1090,14 @@ ifndef NO_LIBBABELTRACE > EXTLIBS += -lbabeltrace-ctf > $(call detected,CONFIG_LIBBABELTRACE) > else > - msg := $(warning No libbabeltrace found, disables 'perf data' CTF format support, please install libbabeltrace-dev[el]/libbabeltrace-ctf-dev); > + $(warning No libbabeltrace found, disables 'perf data' CTF format support, please install libbabeltrace-dev[el]/libbabeltrace-ctf-dev) > endif > endif > > ifndef NO_AUXTRACE > ifeq ($(SRCARCH),x86) > ifeq ($(feature-get_cpuid), 0) > - msg := $(warning Your gcc lacks the __get_cpuid() builtin, disables support for auxtrace/Intel PT, please install a newer gcc); > + $(warning Your gcc lacks the __get_cpuid() builtin, disables support for auxtrace/Intel PT, please install a newer gcc) > NO_AUXTRACE := 1 > endif > endif > @@ -1155,7 +1155,7 @@ ifndef NO_LIBPFM4 > ASCIIDOC_EXTRA = -aHAVE_LIBPFM=1 > $(call detected,CONFIG_LIBPFM4) > else > - msg := $(warning libpfm4 not found, disables libpfm4 support. Please install libpfm4-dev); > + $(warning libpfm4 not found, disables libpfm4 support. Please install libpfm4-dev) > endif > endif > > @@ -1173,7 +1173,7 @@ ifneq ($(NO_LIBTRACEEVENT),1) > CFLAGS += -DLIBTRACEEVENT_VERSION=$(LIBTRACEEVENT_VERSION_CPP) > $(call detected,CONFIG_LIBTRACEEVENT) > else > - dummy := $(error ERROR: libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel or build with NO_LIBTRACEEVENT=1) > + $(error ERROR: libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel or build with NO_LIBTRACEEVENT=1) > endif > > $(call feature_check,libtracefs) > diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf > index f8774a9b1377..3707fed8dfde 100644 > --- a/tools/perf/Makefile.perf > +++ b/tools/perf/Makefile.perf > @@ -482,7 +482,7 @@ drm_hdr_dir := $(srctree)/tools/include/uapi/drm > drm_ioctl_tbl := $(srctree)/tools/perf/trace/beauty/drm_ioctl.sh > > # Create output directory if not already present > -_dummy := $(shell [ -d '$(beauty_ioctl_outdir)' ] || mkdir -p '$(beauty_ioctl_outdir)') > +$(shell [ -d '$(beauty_ioctl_outdir)' ] || mkdir -p '$(beauty_ioctl_outdir)') > > $(drm_ioctl_array): $(drm_hdr_dir)/drm.h $(drm_hdr_dir)/i915_drm.h $(drm_ioctl_tbl) > $(Q)$(SHELL) '$(drm_ioctl_tbl)' $(drm_hdr_dir) > $@ > @@ -672,7 +672,7 @@ tests-coresight-targets-clean: > all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS) tests-coresight-targets > > # Create python binding output directory if not already present > -_dummy := $(shell [ -d '$(OUTPUT)python' ] || mkdir -p '$(OUTPUT)python') > +$(shell [ -d '$(OUTPUT)python' ] || mkdir -p '$(OUTPUT)python') > > $(OUTPUT)python/perf$(PYTHON_EXTENSION_SUFFIX): $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS) $(LIBPERF) $(LIBSUBCMD) > $(QUIET_GEN)LDSHARED="$(CC) -pthread -shared" \ > diff --git a/tools/perf/arch/arm64/Makefile b/tools/perf/arch/arm64/Makefile > index fab3095fb5d0..5735ed4479bb 100644 > --- a/tools/perf/arch/arm64/Makefile > +++ b/tools/perf/arch/arm64/Makefile > @@ -18,7 +18,7 @@ sysprf := $(srctree)/tools/perf/arch/arm64/entry/syscalls/ > systbl := $(sysprf)/mksyscalltbl > > # Create output directory if not already present > -_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') > +$(shell [ -d '$(out)' ] || mkdir -p '$(out)') > > $(header): $(sysdef) $(systbl) > $(Q)$(SHELL) '$(systbl)' '$(CC)' '$(HOSTCC)' $(incpath) $(sysdef) > $@ > diff --git a/tools/perf/arch/loongarch/Makefile b/tools/perf/arch/loongarch/Makefile > index c392e7af4743..3992a67a87d9 100644 > --- a/tools/perf/arch/loongarch/Makefile > +++ b/tools/perf/arch/loongarch/Makefile > @@ -17,7 +17,7 @@ sysprf := $(srctree)/tools/perf/arch/loongarch/entry/syscalls/ > systbl := $(sysprf)/mksyscalltbl > > # Create output directory if not already present > -_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') > +$(shell [ -d '$(out)' ] || mkdir -p '$(out)') > > $(header): $(sysdef) $(systbl) > $(Q)$(SHELL) '$(systbl)' '$(CC)' '$(HOSTCC)' $(incpath) $(sysdef) > $@ > diff --git a/tools/perf/arch/mips/Makefile b/tools/perf/arch/mips/Makefile > index 8bc09072e3d6..cd0b011b3be5 100644 > --- a/tools/perf/arch/mips/Makefile > +++ b/tools/perf/arch/mips/Makefile > @@ -11,7 +11,7 @@ sysdef := $(sysprf)/syscall_n64.tbl > systbl := $(sysprf)/mksyscalltbl > > # Create output directory if not already present > -_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') > +$(shell [ -d '$(out)' ] || mkdir -p '$(out)') > > $(header): $(sysdef) $(systbl) > $(Q)$(SHELL) '$(systbl)' $(sysdef) > $@ > diff --git a/tools/perf/arch/powerpc/Makefile b/tools/perf/arch/powerpc/Makefile > index 840ea0e59287..bf6d323574f6 100644 > --- a/tools/perf/arch/powerpc/Makefile > +++ b/tools/perf/arch/powerpc/Makefile > @@ -19,7 +19,7 @@ sysdef := $(sysprf)/syscall.tbl > systbl := $(sysprf)/mksyscalltbl > > # Create output directory if not already present > -_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') > +$(shell [ -d '$(out)' ] || mkdir -p '$(out)') > > $(header64): $(sysdef) $(systbl) > $(Q)$(SHELL) '$(systbl)' '64' $(sysdef) > $@ > diff --git a/tools/perf/arch/s390/Makefile b/tools/perf/arch/s390/Makefile > index 74bffbea03e2..56994e63b43a 100644 > --- a/tools/perf/arch/s390/Makefile > +++ b/tools/perf/arch/s390/Makefile > @@ -17,7 +17,7 @@ sysdef := $(sysprf)/syscall.tbl > systbl := $(sysprf)/mksyscalltbl > > # Create output directory if not already present > -_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') > +$(shell [ -d '$(out)' ] || mkdir -p '$(out)') > > $(header): $(sysdef) $(systbl) > $(Q)$(SHELL) '$(systbl)' $(sysdef) > $@ > diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile > index 5a9f9a7bf07d..8952e00f9b60 100644 > --- a/tools/perf/arch/x86/Makefile > +++ b/tools/perf/arch/x86/Makefile > @@ -17,7 +17,7 @@ sys := $(srctree)/tools/perf/arch/x86/entry/syscalls > systbl := $(sys)/syscalltbl.sh > > # Create output directory if not already present > -_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') > +$(shell [ -d '$(out)' ] || mkdir -p '$(out)') > > $(header): $(sys)/syscall_64.tbl $(systbl) > $(Q)$(SHELL) '$(systbl)' $(sys)/syscall_64.tbl 'x86_64' > $@ > diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include > index 6fba29f3222d..0aa4005017c7 100644 > --- a/tools/scripts/Makefile.include > +++ b/tools/scripts/Makefile.include > @@ -1,7 +1,7 @@ > # SPDX-License-Identifier: GPL-2.0 > ifneq ($(O),) > ifeq ($(origin O), command line) > - dummy := $(if $(shell cd $(PWD); test -d $(O) || echo $(O)),$(error O=$(O) does not exist),) > + $(if $(shell cd $(PWD); test -d $(O) || echo $(O)),$(error O=$(O) does not exist),) > ABSOLUTE_O := $(shell cd $(PWD); cd $(O) ; pwd) > OUTPUT := $(ABSOLUTE_O)/$(if $(subdir),$(subdir)/) > COMMAND_O := O=$(ABSOLUTE_O) > diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile > index 492e937fab00..14684aeb4b55 100644 > --- a/tools/testing/selftests/kvm/Makefile > +++ b/tools/testing/selftests/kvm/Makefile > @@ -285,7 +285,7 @@ EXTRA_CLEAN += $(GEN_HDRS) \ > $(TEST_GEN_OBJ) \ > cscope.* > > -x := $(shell mkdir -p $(sort $(dir $(LIBKVM_C_OBJ) $(LIBKVM_S_OBJ)))) > +$(shell mkdir -p $(sort $(dir $(LIBKVM_C_OBJ) $(LIBKVM_S_OBJ)))) > $(LIBKVM_C_OBJ): $(OUTPUT)/%.o: %.c $(GEN_HDRS) > $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c $< -o $@ > > @@ -298,7 +298,7 @@ $(LIBKVM_S_OBJ): $(OUTPUT)/%.o: %.S $(GEN_HDRS) > $(LIBKVM_STRING_OBJ): $(OUTPUT)/%.o: %.c > $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -ffreestanding $< -o $@ > > -x := $(shell mkdir -p $(sort $(dir $(TEST_GEN_PROGS)))) > +$(shell mkdir -p $(sort $(dir $(TEST_GEN_PROGS)))) > $(SPLIT_TESTS_OBJS): $(GEN_HDRS) > $(TEST_GEN_PROGS): $(LIBKVM_OBJS) > $(TEST_GEN_PROGS_EXTENDED): $(LIBKVM_OBJS) > -- > 2.40.1 >
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