814f63ec32
Add a new option BR2_GCC_ENABLE_LTO that builds gcc and binutils with
LTO support.
Individual packages still have to enable LTO explicitly by passing '-flto' to
GCC, which passes it on to the linker. This option does not add that flag
globally. Some packages detect if the compiler supports LTO and enable the flag
if it does.
To support LTO, ar and ranlib must be called with an argument which triggers the
usage of the LTO plugin. Since GCC doesn't call these tools itself, it instead
provides wrappers for ar and ranlib that pass the LTO arguments. This way
existing Makefiles don't need to be changed for LTO support. However, these
wrappers are called <tuple>-gcc-ar which matches the pattern to link to the
buildroot wrapper in the external toolchain logic. So the external toolchain
logic is updated to provide the correct symlink.
[Thomas:
- Add a separate BR2_BINUTILS_ENABLE_LTO option to enable LTO
support in binutils. This is a blind option, selected by
BR2_GCC_ENABLE_LTO. It just avoids having binutils.mk poke
directly into gcc Config.in options.
- Remove the check on the AVR32 special gcc version, which we don't
support anymore.
- Adapt the help text of the LTO Config.in option to no longer
mention "Since version 4.5", since we only support gcc >= 4.5 in
Buildroot anyway.
- Fix typo in toolchain-external.mk comment.]
Signed-off-by: Peter Kümmel <syntheticpp@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
105 lines
3.4 KiB
Makefile
105 lines
3.4 KiB
Makefile
################################################################################
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#
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# binutils
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#
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################################################################################
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# Version is set when using buildroot toolchain.
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# If not, we do like other packages
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BINUTILS_VERSION = $(call qstrip,$(BR2_BINUTILS_VERSION))
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ifeq ($(BINUTILS_VERSION),)
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BINUTILS_VERSION = 2.22
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endif
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ifeq ($(BR2_arc),y)
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BINUTILS_SITE = $(call github,foss-for-synopsys-dwc-arc-processors,binutils-gdb,$(BINUTILS_VERSION))
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BINUTILS_SOURCE = binutils-$(BINUTILS_VERSION).tar.gz
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BINUTILS_FROM_GIT = y
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endif
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BINUTILS_SITE ?= $(BR2_GNU_MIRROR)/binutils
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BINUTILS_SOURCE ?= binutils-$(BINUTILS_VERSION).tar.bz2
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BINUTILS_EXTRA_CONFIG_OPTIONS = $(call qstrip,$(BR2_BINUTILS_EXTRA_CONFIG_OPTIONS))
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BINUTILS_INSTALL_STAGING = YES
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BINUTILS_DEPENDENCIES = $(if $(BR2_NEEDS_GETTEXT_IF_LOCALE),gettext)
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HOST_BINUTILS_DEPENDENCIES =
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BINUTILS_LICENSE = GPLv3+, libiberty LGPLv2.1+
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BINUTILS_LICENSE_FILES = COPYING3 COPYING.LIB
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ifeq ($(BINUTILS_FROM_GIT),y)
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BINUTILS_DEPENDENCIES += host-texinfo host-flex host-bison
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HOST_BINUTILS_DEPENDENCIES += host-texinfo host-flex host-bison
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endif
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# When binutils sources are fetched from the binutils-gdb repository,
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# they also contain the gdb sources, but gdb shouldn't be built, so we
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# disable it.
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BINUTILS_DISABLE_GDB_CONF_OPTS = \
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--disable-sim \
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--disable-gdb
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# We need to specify host & target to avoid breaking ARM EABI
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BINUTILS_CONF_OPTS = \
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--disable-multilib \
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--disable-werror \
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--host=$(GNU_TARGET_NAME) \
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--target=$(GNU_TARGET_NAME) \
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--enable-install-libiberty \
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$(BINUTILS_DISABLE_GDB_CONF_OPTS) \
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$(BINUTILS_EXTRA_CONFIG_OPTIONS)
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# Don't build documentation. It takes up extra space / build time,
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# and sometimes needs specific makeinfo versions to work
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BINUTILS_CONF_ENV += ac_cv_prog_MAKEINFO=missing
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HOST_BINUTILS_CONF_ENV += ac_cv_prog_MAKEINFO=missing
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# Install binutils after busybox to prefer full-blown utilities
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ifeq ($(BR2_PACKAGE_BUSYBOX),y)
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BINUTILS_DEPENDENCIES += busybox
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endif
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# "host" binutils should actually be "cross"
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# We just keep the convention of "host utility" for now
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HOST_BINUTILS_CONF_OPTS = \
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--disable-multilib \
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--disable-werror \
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--target=$(GNU_TARGET_NAME) \
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--disable-shared \
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--enable-static \
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--with-sysroot=$(STAGING_DIR) \
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--enable-poison-system-directories \
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$(BINUTILS_DISABLE_GDB_CONF_OPTS) \
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$(BINUTILS_EXTRA_CONFIG_OPTIONS)
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# We just want libbfd, libiberty and libopcodes,
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# not the full-blown binutils in staging
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define BINUTILS_INSTALL_STAGING_CMDS
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$(MAKE) -C $(@D)/bfd DESTDIR=$(STAGING_DIR) install
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$(MAKE) -C $(@D)/opcodes DESTDIR=$(STAGING_DIR) install
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$(MAKE) -C $(@D)/libiberty DESTDIR=$(STAGING_DIR) install
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endef
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# If we don't want full binutils on target
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ifneq ($(BR2_PACKAGE_BINUTILS_TARGET),y)
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define BINUTILS_INSTALL_TARGET_CMDS
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$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)/bfd DESTDIR=$(TARGET_DIR) install
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$(MAKE) -C $(@D)/libiberty DESTDIR=$(STAGING_DIR) install
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endef
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endif
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XTENSA_CORE_NAME = $(call qstrip, $(BR2_XTENSA_CORE_NAME))
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ifneq ($(XTENSA_CORE_NAME),)
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define BINUTILS_XTENSA_PRE_PATCH
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tar xf $(BR2_XTENSA_OVERLAY_DIR)/xtensa_$(XTENSA_CORE_NAME).tar \
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-C $(@D) --strip-components=1 binutils
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endef
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BINUTILS_PRE_PATCH_HOOKS += BINUTILS_XTENSA_PRE_PATCH
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HOST_BINUTILS_PRE_PATCH_HOOKS += BINUTILS_XTENSA_PRE_PATCH
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endif
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ifeq ($(BR2_BINUTILS_ENABLE_LTO),y)
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HOST_BINUTILS_CONF_OPTS += --enable-plugins --enable-lto
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endif
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$(eval $(autotools-package))
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$(eval $(host-autotools-package))
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