d4a2020424
perf does not honour the -j flags we pass to make; it yet again tries to reinvent the wheel and by default uses the number of CPUs as the number of parallel jobs. Fortunately, in their infinite wisdom, the insane developpers of the perf buildsystem were kind enough to provide us with a variable we can set to specify the number of parallel jobs. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
115 lines
3.5 KiB
Makefile
115 lines
3.5 KiB
Makefile
################################################################################
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#
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# perf
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#
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################################################################################
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LINUX_TOOLS += perf
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PERF_DEPENDENCIES = host-flex host-bison
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ifeq ($(KERNEL_ARCH),x86_64)
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PERF_ARCH=x86
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else
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PERF_ARCH=$(KERNEL_ARCH)
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endif
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PERF_MAKE_FLAGS = \
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$(LINUX_MAKE_FLAGS) \
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JOBS=$(PARALLEL_JOBS) \
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ARCH=$(PERF_ARCH) \
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NO_LIBAUDIT=1 \
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NO_NEWT=1 \
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NO_GTK2=1 \
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NO_LIBPERL=1 \
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NO_LIBPYTHON=1 \
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DESTDIR=$(TARGET_DIR) \
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prefix=/usr \
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WERROR=0
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# We need to pass an argument to ld for setting the endianness when
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# building it for MIPS architecture, otherwise the default one will
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# always be used (which is big endian) and the compilation for little
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# endian will always fail showing an error like this one:
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# LD foo.o
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# mips-linux-gnu-ld: foo.o: compiled for a little endian system and
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# target is big endian
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ifeq ($(BR2_mips)$(BR2_mips64),y)
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PERF_MAKE_FLAGS += LD="$(TARGET_LD) -EB"
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else ifeq ($(BR2_mipsel)$(BR2_mips64el),y)
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PERF_MAKE_FLAGS += LD="$(TARGET_LD) -EL"
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endif
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# The call to backtrace() function fails for ARC, because for some
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# reason the unwinder from libgcc returns early. Thus the usage of
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# backtrace() should be disabled in perf explicitly: at build time
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# backtrace() appears to be available, but it fails at runtime: the
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# backtrace will contain only several functions from the top of stack,
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# instead of the complete backtrace.
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ifeq ($(BR2_arc),y)
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PERF_MAKE_FLAGS += NO_BACKTRACE=1
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endif
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ifeq ($(BR2_PACKAGE_SLANG),y)
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PERF_DEPENDENCIES += slang
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endif
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ifeq ($(BR2_PACKAGE_LIBUNWIND),y)
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PERF_DEPENDENCIES += libunwind
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endif
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ifeq ($(BR2_PACKAGE_NUMACTL),y)
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PERF_DEPENDENCIES += numactl
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endif
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ifeq ($(BR2_PACKAGE_ELFUTILS),y)
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PERF_DEPENDENCIES += elfutils
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else
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PERF_MAKE_FLAGS += NO_LIBELF=1 NO_DWARF=1
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endif
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# We really do not want to build the perf documentation, because it
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# has stringent requirement on the documentation generation tools,
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# like xmlto and asciidoc), which may be lagging behind on some
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# distributions.
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# We name it 'GNUmakefile' so that GNU make will use it instead of
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# the existing 'Makefile'.
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define PERF_DISABLE_DOCUMENTATION
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if [ -f $(@D)/tools/perf/Documentation/Makefile ]; then \
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printf "%%:\n\t@:\n" >$(@D)/tools/perf/Documentation/GNUmakefile; \
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fi
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endef
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LINUX_POST_PATCH_HOOKS += PERF_DISABLE_DOCUMENTATION
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# O must be redefined here to overwrite the one used by Buildroot for
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# out of tree build. We build perf in $(@D)/tools/perf/ and not just
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# $(@D) so that it isn't built in the root directory of the kernel
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# sources.
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define PERF_BUILD_CMDS
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$(Q)if test ! -f $(@D)/tools/perf/Makefile ; then \
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echo "Your kernel version is too old and does not have the perf tool." ; \
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echo "At least kernel 2.6.31 must be used." ; \
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exit 1 ; \
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fi
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$(Q)if test "$(BR2_PACKAGE_ELFUTILS)" = "" ; then \
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if ! grep -q NO_LIBELF $(@D)/tools/perf/Makefile* ; then \
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if ! test -r $(@D)/tools/perf/config/Makefile ; then \
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echo "The perf tool in your kernel cannot be built without libelf." ; \
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echo "Either upgrade your kernel to >= 3.7, or enable the elfutils package." ; \
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exit 1 ; \
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fi \
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fi \
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fi
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$(TARGET_MAKE_ENV) $(MAKE1) $(PERF_MAKE_FLAGS) \
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-C $(@D)/tools/perf O=$(@D)/tools/perf/
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endef
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# After installation, we remove the Perl and Python scripts from the
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# target.
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define PERF_INSTALL_TARGET_CMDS
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$(TARGET_MAKE_ENV) $(MAKE1) $(PERF_MAKE_FLAGS) \
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-C $(@D)/tools/perf O=$(@D)/tools/perf/ install
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$(RM) -rf $(TARGET_DIR)/usr/libexec/perf-core/scripts/
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$(RM) -rf $(TARGET_DIR)/usr/libexec/perf-core/tests/
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endef
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