OpenWrt – Rev 4

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GCC_VARIANT:=final

include ../common.mk

GCC_CONFIGURE += \
        --with-headers=$(TOOLCHAIN_DIR)/include \
        --disable-libsanitizer \
        --enable-languages=$(TARGET_LANGUAGES) \
        --enable-shared \
        --enable-threads \
        --with-slibdir=$(TOOLCHAIN_DIR)/lib \
        --enable-lto \
        --with-libelf=$(TOPDIR)/staging_dir/host

ifdef CONFIG_USE_MUSL
  GCC_MAKE += gcc_cv_libc_provides_ssp=yes
endif

ifneq ($(CONFIG_SJLJ_EXCEPTIONS),)
  GCC_CONFIGURE += \
        --enable-sjlj-exceptions
endif

define CleanupToolchain
        $(INSTALL_DIR) $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)
        # Important!  Required for limits.h to be fixed.
        rm -rf $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/sys-include
        ln -sf ../include $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/sys-include
        rm -rf $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/lib
        ln -sf ../lib $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/lib
        $(if $(CONFIG_ARCH_64BIT),ln -sf ../lib64 $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/lib64)
endef

define Host/Configure
        $(CleanupToolchain)
        mkdir -p $(GCC_BUILD_DIR)
        (cd $(GCC_BUILD_DIR) && rm -f config.cache; \
                $(GCC_CONFIGURE) \
        );
endef

ifeq ($(CONFIG_USE_GLIBC)$(CONFIG_INSTALL_GCCGO),yy)
define FixGogccCrt
        # link crtX.o for gotools
        mkdir -p $(GCC_BUILD_DIR)/gotools
        $(foreach crt, i 1 n, ln -sf ../../glibc-dev/lib/crt$(crt).o $(GCC_BUILD_DIR)/gotools/ ; )
endef
endif

define Host/Compile
        $(FixGogccCrt)
        +$(GCC_MAKE) $(HOST_JOBS) -C $(GCC_BUILD_DIR) all
endef

define SetupExtraArch
        for app in $(TOOLCHAIN_DIR)/bin/$(OPTIMIZE_FOR_CPU)*-{gcc,gcc-*,g++}; do \
                [ -e $$$$app ] || continue; \
                old_base=$$$$(basename $$$$app); \
                new_base=$(call qstrip,$(CONFIG_EXTRA_TARGET_ARCH_NAME))-$$$${old_base##$(OPTIMIZE_FOR_CPU)-}; \
                sed -e "s/@CC_BASE@/$$$$old_base/" \
                        -e 's/@EXTRA_ARCH_OPTS@/$(call qstrip,$(CONFIG_EXTRA_TARGET_ARCH_OPTS))/' \
                         ../files/alternate-arch-cc.in > \
                         $(TOOLCHAIN_DIR)/bin/$$$$new_base; \
                chmod a+x $(TOOLCHAIN_DIR)/bin/$$$$new_base; \
        done
endef

define Host/Install
        $(CleanupToolchain)
        +$(GCC_MAKE) $(HOST_JOBS) -C $(GCC_BUILD_DIR) install
        # Set up the symlinks to enable lying about target name.
        set -e; \
        (cd $(TOOLCHAIN_DIR); \
                ln -sf $(REAL_GNU_TARGET_NAME) $(GNU_TARGET_NAME); \
                cd bin; \
                for app in $(REAL_GNU_TARGET_NAME)-* ; do \
                        ln -sf $$$${app} \
                        $(GNU_TARGET_NAME)$$$${app##$(REAL_GNU_TARGET_NAME)}; \
                done; \
        );
        $(if $(CONFIG_EXTRA_TARGET_ARCH),$(call SetupExtraArch))
        $(RM) $(TOOLCHAIN_DIR)/lib/libiberty.a
        $(SCRIPT_DIR)/patch-specs.sh "$(TOOLCHAIN_DIR)"
endef

$(eval $(call HostBuild))