dd8a410eaf
The variable 'KERNEL_ARCH' is actually a normalized version of
'ARCH'/'BR2_ARCH'. For example, 'arcle' and 'arceb' both become 'arc', just
as all powerpc variants become 'powerpc'.
It is presumably called 'KERNEL_ARCH' because the Linux kernel is typically
the first place where support for a new architecture is added, and thus is
the entity that defines the normalized name.
However, the term 'KERNEL_ARCH' can also be interpreted as 'the architecture
used by the kernel', which need not be exactly the same as 'the normalized
name for a certain arch'. In particular, for cases where a 64-bit
architecture is running a 64-bit kernel but 32-bit userspace. Examples
include:
* aarch64 architecture, with aarch64 kernel and 32-bit (ARM) userspace
* x86_64 architecture, with x86_64 kernel and 32-bit (i386) userspace
In such cases, the 'architecture used by the kernel' needs to refer to the
64-bit name (aarch64, x86_64), whereas all userspace applications need to
refer the, potentially normalized, 32-bit name.
This means that there need to be two different variables:
KERNEL_ARCH: the architecture used by the kernel
NORMALIZED_ARCH: the normalized name for the current userspace architecture
At this moment, both will actually have the same content. But a subsequent
patch will add basic support for situations described above, in which
KERNEL_ARCH may become overwritten to the 64-bit architecture, while
NORMALIZED_ARCH needs to remain the same (32-bit) case.
This commit replaces use of KERNEL_ARCH where actually the userspace arch is
needed. Places that use KERNEL_ARCH in combination with building of kernel
modules are not touched.
There may be cases where a package builds both a kernel module as userspace,
in which case it may need to know about both KERNEL_ARCH and
NORMALIZED_ARCH, for the case where they differ. But this is to be fixed on
a per-need basis.
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
[Arnout: Also rename BR2_KERNEL_ARCH to BR2_NORMALIZED_ARCH]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
174 lines
4.8 KiB
Makefile
174 lines
4.8 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 ($(NORMALIZED_ARCH),x86_64)
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PERF_ARCH=x86
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else
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PERF_ARCH=$(NORMALIZED_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=$(PERF_ARCH) \
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DESTDIR=$(TARGET_DIR) \
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prefix=/usr \
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WERROR=0 \
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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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NO_LIBBIONIC=1
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# We need to pass an argument to ld for setting the emulation when
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# building for MIPS architecture, otherwise the default one will always
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# be used and the compilation for most variants will fail.
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ifeq ($(BR2_mips),y)
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PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf32btsmip"
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else ifeq ($(BR2_mipsel),y)
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PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf32ltsmip"
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else ifeq ($(BR2_mips64),y)
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ifeq ($(BR2_MIPS_NABI32),y)
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PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf32btsmipn32"
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else
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PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf64btsmip"
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endif
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else ifeq ($(BR2_mips64el),y)
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ifeq ($(BR2_MIPS_NABI32),y)
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PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf32ltsmipn32"
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else
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PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf64ltsmip"
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endif
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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_LINUX_TOOLS_PERF_TUI),y)
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PERF_DEPENDENCIES += slang
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else
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PERF_MAKE_FLAGS += NO_NEWT=1 NO_SLANG=1
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endif
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ifeq ($(BR2_PACKAGE_AUDIT),y)
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PERF_DEPENDENCIES += audit
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else
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PERF_MAKE_FLAGS += NO_LIBAUDIT=1
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endif
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ifeq ($(BR2_PACKAGE_ZSTD),y)
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PERF_DEPENDENCIES += zstd
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endif
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ifeq ($(BR2_PACKAGE_LIBUNWIND),y)
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PERF_DEPENDENCIES += libunwind
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else
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PERF_MAKE_FLAGS += NO_LIBUNWIND=1
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endif
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ifeq ($(BR2_PACKAGE_NUMACTL),y)
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PERF_DEPENDENCIES += numactl
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else
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PERF_MAKE_FLAGS += NO_LIBNUMA=1
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endif
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ifeq ($(BR2_PACKAGE_ELFUTILS),y)
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PERF_DEPENDENCIES += elfutils
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else
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PERF_MAKE_FLAGS += NO_LIBELF=1 NO_DWARF=1
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endif
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ifeq ($(BR2_PACKAGE_BINUTILS),y)
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PERF_DEPENDENCIES += binutils
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else
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PERF_MAKE_FLAGS += NO_DEMANGLE=1
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endif
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ifeq ($(BR2_PACKAGE_OPENSSL),y)
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PERF_DEPENDENCIES += openssl
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else
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PERF_MAKE_FLAGS += NO_LIBCRYPTO=1
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endif
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ifeq ($(BR2_PACKAGE_ZLIB),y)
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PERF_DEPENDENCIES += zlib
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else
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PERF_MAKE_FLAGS += NO_ZLIB=1
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endif
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# lzma is provided by xz
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ifeq ($(BR2_PACKAGE_XZ),y)
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PERF_DEPENDENCIES += xz
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else
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PERF_MAKE_FLAGS += NO_LZMA=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 $(LINUX_DIR)/tools/perf/Documentation/Makefile ]; then \
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printf "%%:\n\t@:\n" >$(LINUX_DIR)/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 $(LINUX_DIR)/tools/perf/ and not just
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# $(LINUX_DIR) so that it isn't built in the root directory of the kernel
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# sources.
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define PERF_BUILD_CMDS
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$(Q)if test ! -f $(LINUX_DIR)/tools/perf/Makefile ; then \
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echo "Your kernel version is too old and does not have the perf tool." ; \
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echo "At least kernel 2.6.31 must be used." ; \
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exit 1 ; \
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fi
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$(Q)if test "$(BR2_PACKAGE_ELFUTILS)" = "" ; then \
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if ! grep -q NO_LIBELF $(LINUX_DIR)/tools/perf/Makefile* ; then \
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if ! test -r $(LINUX_DIR)/tools/perf/config/Makefile ; then \
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echo "The perf tool in your kernel cannot be built without libelf." ; \
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echo "Either upgrade your kernel to >= 3.7, or enable the elfutils package." ; \
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exit 1 ; \
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fi \
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fi \
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fi
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$(Q)if test "$(BR2_PACKAGE_LINUX_TOOLS_PERF_TUI)" = "y" ; then \
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if ! grep -q NO_SLANG $(LINUX_DIR)/tools/perf/Makefile* ; then \
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echo "The perf tool in your kernel cannot be build with the TUI." ; \
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echo "Either upgrade your kernel to >= 3.10, or disable the TUI." ; \
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exit 1 ; \
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fi \
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fi
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$(TARGET_MAKE_ENV) $(MAKE1) $(PERF_MAKE_FLAGS) \
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-C $(LINUX_DIR)/tools/perf O=$(LINUX_DIR)/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 $(LINUX_DIR)/tools/perf O=$(LINUX_DIR)/tools/perf/ install
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$(RM) -rf $(TARGET_DIR)/usr/libexec/perf-core/scripts/
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$(RM) -rf $(TARGET_DIR)/usr/libexec/perf-core/tests/
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endef
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define PERF_LINUX_CONFIG_FIXUPS
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$(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS)
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endef
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