################################################################################
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#
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# glibc
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#
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################################################################################
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# Generate version string using:
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# git describe --match 'glibc-*' --abbrev=40 origin/release/MAJOR.MINOR/master | cut -d '-' -f 2-
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# When updating the version, please also update localedef
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ifeq ($(BR2_PACKAGE_GLIBC_2_29),y)
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GLIBC_VERSION = 2.29-11-ge28ad442e73b00ae2047d89c8cc7f9b2a0de5436
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else
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GLIBC_VERSION = 2.35-96-g2c4fc8e5ca742c6a3a1933799495bb0b00a807f0
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endif
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# Upstream doesn't officially provide an https download link.
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# There is one (https://sourceware.org/git/glibc.git) but it's not reliable,
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# sometimes the connection times out. So use an unofficial github mirror.
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# When updating the version, check it on the official repository;
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# *NEVER* decide on a version string by looking at the mirror.
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# Then check that the mirror has been synced already (happens once a day.)
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GLIBC_SITE = $(call github,bminor,glibc,$(GLIBC_VERSION))
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GLIBC_LICENSE = GPL-2.0+ (programs), LGPL-2.1+, BSD-3-Clause, MIT (library)
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GLIBC_LICENSE_FILES = COPYING COPYING.LIB LICENSES
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GLIBC_CPE_ID_VENDOR = gnu
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# glibc is part of the toolchain so disable the toolchain dependency
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GLIBC_ADD_TOOLCHAIN_DEPENDENCY = NO
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# Before glibc is configured, we must have the first stage
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# cross-compiler and the kernel headers
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GLIBC_DEPENDENCIES = host-gcc-initial linux-headers host-bison host-gawk \
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$(BR2_MAKE_HOST_DEPENDENCY) $(BR2_PYTHON3_HOST_DEPENDENCY)
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GLIBC_SUBDIR = build
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GLIBC_INSTALL_STAGING = YES
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GLIBC_INSTALL_STAGING_OPTS = install_root=$(STAGING_DIR) install
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# Thumb build is broken, build in ARM mode
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ifeq ($(BR2_ARM_INSTRUCTIONS_THUMB),y)
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GLIBC_EXTRA_CFLAGS += -marm
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endif
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# MIPS64 defaults to n32 so pass the correct -mabi if
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# we are using a different ABI. OABI32 is also used
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# in MIPS so we pass -mabi=32 in this case as well
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# even though it's not strictly necessary.
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ifeq ($(BR2_MIPS_NABI64),y)
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GLIBC_EXTRA_CFLAGS += -mabi=64
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else ifeq ($(BR2_MIPS_OABI32),y)
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GLIBC_EXTRA_CFLAGS += -mabi=32
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endif
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ifeq ($(BR2_ENABLE_DEBUG),y)
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GLIBC_EXTRA_CFLAGS += -g
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endif
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# glibc explicitly requires compile barriers between files
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ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_4_7),y)
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GLIBC_EXTRA_CFLAGS += -fno-lto
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endif
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# The stubs.h header is not installed by install-headers, but is
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# needed for the gcc build. An empty stubs.h will work, as explained
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# in http://gcc.gnu.org/ml/gcc/2002-01/msg00900.html. The same trick
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# is used by Crosstool-NG.
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ifeq ($(BR2_TOOLCHAIN_BUILDROOT_GLIBC),y)
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define GLIBC_ADD_MISSING_STUB_H
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mkdir -p $(STAGING_DIR)/usr/include/gnu
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touch $(STAGING_DIR)/usr/include/gnu/stubs.h
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endef
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endif
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GLIBC_CONF_ENV = \
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ac_cv_path_BASH_SHELL=/bin/$(if $(BR2_PACKAGE_BASH),bash,sh) \
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libc_cv_forced_unwind=yes \
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libc_cv_ssp=no
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# POSIX shell does not support localization, so remove the corresponding
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# syntax from ldd if bash is not selected.
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ifeq ($(BR2_PACKAGE_BASH),)
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define GLIBC_LDD_NO_BASH
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$(SED) 's/$$"/"/g' $(@D)/elf/ldd.bash.in
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endef
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GLIBC_POST_PATCH_HOOKS += GLIBC_LDD_NO_BASH
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endif
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# Override the default library locations of /lib64/<abi> and
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# /usr/lib64/<abi>/ for RISC-V.
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ifeq ($(BR2_riscv),y)
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ifeq ($(BR2_RISCV_64),y)
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GLIBC_CONF_ENV += libc_cv_slibdir=/lib64 libc_cv_rtlddir=/lib
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else
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GLIBC_CONF_ENV += libc_cv_slibdir=/lib32 libc_cv_rtlddir=/lib
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endif
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endif
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# glibc requires make >= 4.0 since 2.28 release.
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# https://www.sourceware.org/ml/libc-alpha/2018-08/msg00003.html
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GLIBC_MAKE = $(BR2_MAKE)
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GLIBC_CONF_ENV += ac_cv_prog_MAKE="$(BR2_MAKE)"
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ifeq ($(BR2_PACKAGE_GLIBC_KERNEL_COMPAT),)
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ifeq ($(BR2_PACKAGE_LINUX_HEADERS_AUTO_VERSION),y)
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GLIBC_CONF_OPTS += --enable-kernel=$(LINUX_HEADERS_VERSION_REAL)
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else
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GLIBC_CONF_OPTS += --enable-kernel=$(call qstrip,$(BR2_TOOLCHAIN_HEADERS_AT_LEAST))
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endif
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endif
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# Even though we use the autotools-package infrastructure, we have to
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# override the default configure commands for several reasons:
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#
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# 1. We have to build out-of-tree, but we can't use the same
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# 'symbolic link to configure' used with the gcc packages.
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#
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# 2. We have to execute the configure script with bash and not sh.
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#
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# Glibc nowadays can be build with optimization flags f.e. -Os
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GLIBC_CFLAGS = $(TARGET_OPTIMIZATION)
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# crash in qemu-system-nios2 with -Os
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ifeq ($(BR2_nios2),y)
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GLIBC_CFLAGS += -O2
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endif
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# glibc can't be built without optimization
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ifeq ($(BR2_OPTIMIZE_0),y)
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GLIBC_CFLAGS += -O1
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endif
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# glibc can't be built with Optimize for fast
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ifeq ($(BR2_OPTIMIZE_FAST),y)
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GLIBC_CFLAGS += -O2
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endif
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define GLIBC_CONFIGURE_CMDS
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mkdir -p $(@D)/build
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# Do the configuration
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(cd $(@D)/build; \
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$(TARGET_CONFIGURE_OPTS) \
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CFLAGS="$(GLIBC_CFLAGS) $(GLIBC_EXTRA_CFLAGS)" CPPFLAGS="" \
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CXXFLAGS="$(GLIBC_CFLAGS) $(GLIBC_EXTRA_CFLAGS)" \
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$(GLIBC_CONF_ENV) \
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$(SHELL) $(@D)/configure \
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--target=$(GNU_TARGET_NAME) \
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--host=$(GNU_TARGET_NAME) \
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--build=$(GNU_HOST_NAME) \
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--prefix=/usr \
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--enable-shared \
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$(if $(BR2_x86_64),--enable-lock-elision) \
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--with-pkgversion="Buildroot" \
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--disable-profile \
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--disable-werror \
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--without-gd \
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--with-headers=$(STAGING_DIR)/usr/include \
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$(GLIBC_CONF_OPTS))
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$(GLIBC_ADD_MISSING_STUB_H)
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endef
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#
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# We also override the install to target commands since we only want
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# to install the libraries, and nothing more.
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#
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GLIBC_LIBS_LIB = \
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ld*.so.* libanl.so.* libc.so.* libcrypt.so.* libdl.so.* libgcc_s.so.* \
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libm.so.* libpthread.so.* libresolv.so.* librt.so.* \
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libutil.so.* libnss_files.so.* libnss_dns.so.* libmvec.so.*
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ifeq ($(BR2_PACKAGE_GDB),y)
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GLIBC_LIBS_LIB += libthread_db.so.*
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endif
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ifeq ($(BR2_PACKAGE_GLIBC_UTILS),y)
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GLIBC_TARGET_UTILS_USR_BIN = posix/getconf elf/ldd
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GLIBC_TARGET_UTILS_SBIN = elf/ldconfig
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ifeq ($(BR2_SYSTEM_ENABLE_NLS),y)
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GLIBC_TARGET_UTILS_USR_BIN += locale/locale
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endif
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endif
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define GLIBC_INSTALL_TARGET_CMDS
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for libpattern in $(GLIBC_LIBS_LIB); do \
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$(call copy_toolchain_lib_root,$$libpattern) ; \
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done
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$(foreach util,$(GLIBC_TARGET_UTILS_USR_BIN), \
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$(INSTALL) -D -m 0755 $(@D)/build/$(util) $(TARGET_DIR)/usr/bin/$(notdir $(util))
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)
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$(foreach util,$(GLIBC_TARGET_UTILS_SBIN), \
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$(INSTALL) -D -m 0755 $(@D)/build/$(util) $(TARGET_DIR)/sbin/$(notdir $(util))
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)
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endef
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ifeq ($(BR2_PACKAGE_GLIBC_GEN_LD_CACHE),y)
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GLIBC_DEPENDENCIES += host-qemu
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define GLIBC_GEN_LD_CACHE
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mkdir -p $(TARGET_DIR)/etc $(TARGET_DIR)/tmp
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$(QEMU_USER) $(GLIBC_DIR)/build/elf/ldconfig -r $(TARGET_DIR) || true
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endef
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GLIBC_TARGET_FINALIZE_HOOKS += GLIBC_GEN_LD_CACHE
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endif
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$(eval $(autotools-package))
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