bf23db235c
The explanations given in the commit log of 7d6c79 (Compile static versions of gcc libraries) do not explain why we have to provide custom configure commands, instead of just adding --enable-static to the configure options. Add a comment in the code that explains why that is so. Add a pointer to the ML archives with the explanations, too. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Jérôme Pouiller <jezz@sysmic.org> Acked-by: Jérôme Pouiller <jezz@sysmic.org> Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
203 lines
6.4 KiB
Makefile
203 lines
6.4 KiB
Makefile
################################################################################
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#
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# gcc-final
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#
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################################################################################
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GCC_FINAL_VERSION = $(GCC_VERSION)
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GCC_FINAL_SITE = $(GCC_SITE)
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GCC_FINAL_SOURCE = $(GCC_SOURCE)
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HOST_GCC_FINAL_DEPENDENCIES = \
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$(HOST_GCC_COMMON_DEPENDENCIES) \
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$(BR_LIBC)
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HOST_GCC_FINAL_EXCLUDES = $(HOST_GCC_EXCLUDES)
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HOST_GCC_FINAL_POST_EXTRACT_HOOKS += HOST_GCC_FAKE_TESTSUITE
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ifneq ($(call qstrip, $(BR2_XTENSA_CORE_NAME)),)
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HOST_GCC_FINAL_POST_EXTRACT_HOOKS += HOST_GCC_XTENSA_OVERLAY_EXTRACT
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endif
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HOST_GCC_FINAL_POST_PATCH_HOOKS += HOST_GCC_APPLY_PATCHES
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# gcc doesn't support in-tree build, so we create a 'build'
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# subdirectory in the gcc sources, and build from there.
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HOST_GCC_FINAL_SUBDIR = build
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HOST_GCC_FINAL_PRE_CONFIGURE_HOOKS += HOST_GCC_CONFIGURE_SYMLINK
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# We want to always build the static variants of all the gcc libraries,
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# of which libstdc++, libgomp, libmudflap...
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# To do so, we can not just pass --enable-static to override the generic
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# --disable-static flag, otherwise gcc fails to build some of those
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# libraries, see;
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# http://lists.busybox.net/pipermail/buildroot/2013-October/080412.html
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#
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# So we must completely override the generic commands and provide our own.
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#
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define HOST_GCC_FINAL_CONFIGURE_CMDS
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(cd $(HOST_GCC_FINAL_SRCDIR) && rm -rf config.cache; \
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$(HOST_CONFIGURE_OPTS) \
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CFLAGS="$(HOST_CFLAGS)" \
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LDFLAGS="$(HOST_LDFLAGS)" \
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$(HOST_GCC_FINAL_CONF_ENV) \
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./configure \
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--prefix="$(HOST_DIR)/usr" \
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--sysconfdir="$(HOST_DIR)/etc" \
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--enable-static \
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$(QUIET) $(HOST_GCC_FINAL_CONF_OPTS) \
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)
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endef
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# Languages supported by the cross-compiler
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GCC_FINAL_CROSS_LANGUAGES-y = c
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GCC_FINAL_CROSS_LANGUAGES-$(BR2_INSTALL_LIBSTDCPP) += c++
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GCC_FINAL_CROSS_LANGUAGES-$(BR2_TOOLCHAIN_BUILDROOT_FORTRAN) += fortran
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GCC_FINAL_CROSS_LANGUAGES = $(subst $(space),$(comma),$(GCC_FINAL_CROSS_LANGUAGES-y))
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HOST_GCC_FINAL_CONF_OPTS = \
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$(HOST_GCC_COMMON_CONF_OPTS) \
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--enable-languages=$(GCC_FINAL_CROSS_LANGUAGES) \
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--with-build-time-tools=$(HOST_DIR)/usr/$(GNU_TARGET_NAME)/bin
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HOST_GCC_FINAL_GCC_LIB_DIR = $(HOST_DIR)/usr/$(GNU_TARGET_NAME)/lib*
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# The kernel wants to use the -m4-nofpu option to make sure that it
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# doesn't use floating point operations.
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ifeq ($(BR2_sh4)$(BR2_sh4eb),y)
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HOST_GCC_FINAL_CONF_OPTS += "--with-multilib-list=m4,m4-nofpu"
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HOST_GCC_FINAL_GCC_LIB_DIR = $(HOST_DIR)/usr/$(GNU_TARGET_NAME)/lib/!m4*
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endif
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ifeq ($(BR2_sh4a)$(BR2_sh4aeb),y)
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HOST_GCC_FINAL_CONF_OPTS += "--with-multilib-list=m4a,m4a-nofpu"
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HOST_GCC_FINAL_GCC_LIB_DIR = $(HOST_DIR)/usr/$(GNU_TARGET_NAME)/lib/!m4*
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endif
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# Disable shared libs like libstdc++ if we do static since it confuses linking
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ifeq ($(BR2_STATIC_LIBS),y)
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HOST_GCC_FINAL_CONF_OPTS += --disable-shared
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else
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HOST_GCC_FINAL_CONF_OPTS += --enable-shared
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endif
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ifeq ($(BR2_GCC_ENABLE_OPENMP),y)
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HOST_GCC_FINAL_CONF_OPTS += --enable-libgomp
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else
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HOST_GCC_FINAL_CONF_OPTS += --disable-libgomp
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endif
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# End with user-provided options, so that they can override previously
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# defined options.
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HOST_GCC_FINAL_CONF_OPTS += \
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$(call qstrip,$(BR2_EXTRA_GCC_CONFIG_OPTIONS))
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HOST_GCC_FINAL_CONF_ENV = \
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$(HOST_GCC_COMMON_CONF_ENV)
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HOST_GCC_FINAL_MAKE_OPTS += $(HOST_GCC_COMMON_MAKE_OPTS)
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# Make sure we have 'cc'
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define HOST_GCC_FINAL_CREATE_CC_SYMLINKS
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if [ ! -e $(HOST_DIR)/usr/bin/$(GNU_TARGET_NAME)-cc ]; then \
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ln -snf $(GNU_TARGET_NAME)-gcc \
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$(HOST_DIR)/usr/bin/$(GNU_TARGET_NAME)-cc; \
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fi
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endef
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HOST_GCC_FINAL_POST_INSTALL_HOOKS += HOST_GCC_FINAL_CREATE_CC_SYMLINKS
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HOST_GCC_FINAL_TOOLCHAIN_WRAPPER_ARGS += $(HOST_GCC_COMMON_TOOLCHAIN_WRAPPER_ARGS)
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HOST_GCC_FINAL_POST_BUILD_HOOKS += TOOLCHAIN_BUILD_WRAPPER
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# Note: this must be done after CREATE_CC_SYMLINKS, otherwise the
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# -cc symlink to the wrapper is not created.
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HOST_GCC_FINAL_POST_INSTALL_HOOKS += HOST_GCC_INSTALL_WRAPPER_AND_SIMPLE_SYMLINKS
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# In gcc 4.7.x, the ARM EABIhf library loader path for (e)glibc was not
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# correct, so we create a symbolic link to make things work
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# properly. eglibc installs the library loader as ld-linux-armhf.so.3,
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# but gcc creates binaries that reference ld-linux.so.3.
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ifeq ($(BR2_arm)$(BR2_ARM_EABIHF)$(BR2_GCC_VERSION_4_7_X)$(BR2_TOOLCHAIN_USES_GLIBC),yyyy)
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define HOST_GCC_FINAL_LD_LINUX_LINK
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ln -sf ld-linux-armhf.so.3 $(TARGET_DIR)/lib/ld-linux.so.3
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ln -sf ld-linux-armhf.so.3 $(STAGING_DIR)/lib/ld-linux.so.3
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endef
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HOST_GCC_FINAL_POST_INSTALL_HOOKS += HOST_GCC_FINAL_LD_LINUX_LINK
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endif
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# Cannot use the HOST_GCC_FINAL_USR_LIBS mechanism below, because we want
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# libgcc_s to be installed in /lib and not /usr/lib.
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define HOST_GCC_FINAL_INSTALL_LIBGCC
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-cp -dpf $(HOST_GCC_FINAL_GCC_LIB_DIR)/libgcc_s* \
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$(STAGING_DIR)/lib/
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-cp -dpf $(HOST_GCC_FINAL_GCC_LIB_DIR)/libgcc_s* \
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$(TARGET_DIR)/lib/
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endef
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HOST_GCC_FINAL_POST_INSTALL_HOOKS += HOST_GCC_FINAL_INSTALL_LIBGCC
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define HOST_GCC_FINAL_INSTALL_LIBATOMIC
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-cp -dpf $(HOST_GCC_FINAL_GCC_LIB_DIR)/libatomic* \
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$(STAGING_DIR)/lib/
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-cp -dpf $(HOST_GCC_FINAL_GCC_LIB_DIR)/libatomic* \
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$(TARGET_DIR)/lib/
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endef
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HOST_GCC_FINAL_POST_INSTALL_HOOKS += HOST_GCC_FINAL_INSTALL_LIBATOMIC
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# Handle the installation of libraries in /usr/lib
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HOST_GCC_FINAL_USR_LIBS =
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ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
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HOST_GCC_FINAL_USR_LIBS += libstdc++
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endif
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ifeq ($(BR2_TOOLCHAIN_BUILDROOT_FORTRAN),y)
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HOST_GCC_FINAL_USR_LIBS += libgfortran
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endif
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ifeq ($(BR2_GCC_ENABLE_OPENMP),y)
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HOST_GCC_FINAL_USR_LIBS += libgomp
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endif
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ifeq ($(BR2_GCC_ENABLE_LIBMUDFLAP),y)
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ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
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HOST_GCC_FINAL_USR_LIBS += libmudflapth
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else
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HOST_GCC_FINAL_USR_LIBS += libmudflap
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endif
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endif
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ifneq ($(HOST_GCC_FINAL_USR_LIBS),)
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define HOST_GCC_FINAL_INSTALL_STATIC_LIBS
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for i in $(HOST_GCC_FINAL_USR_LIBS) ; do \
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cp -dpf $(HOST_GCC_FINAL_GCC_LIB_DIR)/$${i}.a \
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$(STAGING_DIR)/usr/lib/ ; \
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done
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endef
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ifeq ($(BR2_STATIC_LIBS),)
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define HOST_GCC_FINAL_INSTALL_SHARED_LIBS
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for i in $(HOST_GCC_FINAL_USR_LIBS) ; do \
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cp -dpf $(HOST_GCC_FINAL_GCC_LIB_DIR)/$${i}.so* \
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$(STAGING_DIR)/usr/lib/ ; \
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cp -dpf $(HOST_GCC_FINAL_GCC_LIB_DIR)/$${i}.so* \
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$(TARGET_DIR)/usr/lib/ ; \
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done
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endef
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endif
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define HOST_GCC_FINAL_INSTALL_USR_LIBS
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mkdir -p $(TARGET_DIR)/usr/lib
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$(HOST_GCC_FINAL_INSTALL_STATIC_LIBS)
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$(HOST_GCC_FINAL_INSTALL_SHARED_LIBS)
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endef
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HOST_GCC_FINAL_POST_INSTALL_HOOKS += HOST_GCC_FINAL_INSTALL_USR_LIBS
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endif
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ifeq ($(BR2_xtensa),y)
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HOST_GCC_FINAL_CONF_OPTS += --enable-cxx-flags="$(TARGET_ABI)"
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endif
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$(eval $(host-autotools-package))
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