Import buildroot 2016.02.01

firmware/buildroot/linux/linux-tool-perf.mk

@@ -0,0 +1,88 @@
+################################################################################
+#
+# perf
+#
+################################################################################
+
+LINUX_TOOLS += perf
+
+PERF_DEPENDENCIES = host-flex host-bison
+
+ifeq ($(KERNEL_ARCH),x86_64)
+PERF_ARCH=x86
+else
+PERF_ARCH=$(KERNEL_ARCH)
+endif
+
+PERF_MAKE_FLAGS = \
+	$(LINUX_MAKE_FLAGS) \
+	ARCH=$(PERF_ARCH) \
+	NO_LIBAUDIT=1 \
+	NO_NEWT=1 \
+	NO_GTK2=1 \
+	NO_LIBPERL=1 \
+	NO_LIBPYTHON=1 \
+	DESTDIR=$(TARGET_DIR) \
+	prefix=/usr \
+	WERROR=0 \
+	ASCIIDOC=
+
+# The call to backtrace() function fails for ARC, because for some
+# reason the unwinder from libgcc returns early. Thus the usage of
+# backtrace() should be disabled in perf explicitly: at build time
+# backtrace() appears to be available, but it fails at runtime: the
+# backtrace will contain only several functions from the top of stack,
+# instead of the complete backtrace.
+ifeq ($(BR2_arc),y)
+PERF_MAKE_FLAGS += NO_BACKTRACE=1
+endif
+
+ifeq ($(BR2_PACKAGE_SLANG),y)
+PERF_DEPENDENCIES += slang
+endif
+
+ifeq ($(BR2_PACKAGE_LIBUNWIND),y)
+PERF_DEPENDENCIES += libunwind
+endif
+
+ifeq ($(BR2_PACKAGE_NUMACTL),y)
+PERF_DEPENDENCIES += numactl
+endif
+
+ifeq ($(BR2_PACKAGE_ELFUTILS),y)
+PERF_DEPENDENCIES += elfutils
+else
+PERF_MAKE_FLAGS += NO_LIBELF=1 NO_DWARF=1
+endif
+
+# O must be redefined here to overwrite the one used by Buildroot for
+# out of tree build. We build perf in $(@D)/tools/perf/ and not just
+# $(@D) so that it isn't built in the root directory of the kernel
+# sources.
+define PERF_BUILD_CMDS
+	$(Q)if test ! -f $(@D)/tools/perf/Makefile ; then \
+		echo "Your kernel version is too old and does not have the perf tool." ; \
+		echo "At least kernel 2.6.31 must be used." ; \
+		exit 1 ; \
+	fi
+	$(Q)if test "$(BR2_PACKAGE_ELFUTILS)" = "" ; then \
+		if ! grep -q NO_LIBELF $(@D)/tools/perf/Makefile* ; then \
+			if ! test -r $(@D)/tools/perf/config/Makefile ; then \
+				echo "The perf tool in your kernel cannot be built without libelf." ; \
+				echo "Either upgrade your kernel to >= 3.7, or enable the elfutils package." ; \
+				exit 1 ; \
+			fi \
+		fi \
+	fi
+	$(TARGET_MAKE_ENV) $(MAKE1) $(PERF_MAKE_FLAGS) \
+		-C $(@D)/tools/perf O=$(@D)/tools/perf/
+endef
+
+# After installation, we remove the Perl and Python scripts from the
+# target.
+define PERF_INSTALL_TARGET_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE1) $(PERF_MAKE_FLAGS) \
+		-C $(@D)/tools/perf O=$(@D)/tools/perf/ install
+	$(RM) -rf $(TARGET_DIR)/usr/libexec/perf-core/scripts/
+	$(RM) -rf $(TARGET_DIR)/usr/libexec/perf-core/tests/
+endef