| ################################################################################ |
| # |
| # glibc/eglibc |
| # |
| ################################################################################ |
| |
| GLIBC_VERSION = $(call qstrip,$(BR2_GLIBC_VERSION_STRING)) |
| |
| ifeq ($(BR2_TOOLCHAIN_BUILDROOT_EGLIBC),y) |
| GLIBC_SITE = http://downloads.yoctoproject.org/releases/eglibc |
| GLIBC_SOURCE = eglibc-$(GLIBC_VERSION).tar.bz2 |
| GLIBC_SRC_SUBDIR = libc |
| else |
| GLIBC_SITE = $(BR2_GNU_MIRROR)/libc |
| GLIBC_SOURCE = glibc-$(GLIBC_VERSION).tar.xz |
| GLIBC_SRC_SUBDIR = . |
| endif |
| |
| GLIBC_LICENSE = GPLv2+ (programs), LGPLv2.1+, BSD-3c, MIT (library) |
| GLIBC_LICENSE_FILES = $(addprefix $(GLIBC_SRC_SUBDIR)/,COPYING COPYING.LIB LICENSES) |
| |
| # glibc is part of the toolchain so disable the toolchain dependency |
| GLIBC_ADD_TOOLCHAIN_DEPENDENCY = NO |
| |
| # Before (e)glibc is configured, we must have the first stage |
| # cross-compiler and the kernel headers |
| GLIBC_DEPENDENCIES = host-gcc-initial linux-headers host-gawk |
| |
| GLIBC_SUBDIR = build |
| |
| GLIBC_INSTALL_STAGING = YES |
| |
| GLIBC_INSTALL_STAGING_OPTS = install_root=$(STAGING_DIR) install |
| |
| # Thumb build is broken, build in ARM mode |
| ifeq ($(BR2_ARM_INSTRUCTIONS_THUMB),y) |
| GLIBC_EXTRA_CFLAGS += -marm |
| endif |
| |
| # MIPS64 defaults to n32 so pass the correct -mabi if |
| # we are using a different ABI. OABI32 is also used |
| # in MIPS so we pass -mabi=32 in this case as well |
| # even though it's not strictly necessary. |
| ifeq ($(BR2_MIPS_NABI64),y) |
| GLIBC_EXTRA_CFLAGS += -mabi=64 |
| else ifeq ($(BR2_MIPS_OABI32),y) |
| GLIBC_EXTRA_CFLAGS += -mabi=32 |
| endif |
| |
| ifeq ($(BR2_ENABLE_DEBUG),y) |
| GLIBC_EXTRA_CFLAGS += -g |
| endif |
| |
| # The stubs.h header is not installed by install-headers, but is |
| # needed for the gcc build. An empty stubs.h will work, as explained |
| # in http://gcc.gnu.org/ml/gcc/2002-01/msg00900.html. The same trick |
| # is used by Crosstool-NG. |
| ifeq ($(BR2_TOOLCHAIN_BUILDROOT_GLIBC),y) |
| define GLIBC_ADD_MISSING_STUB_H |
| mkdir -p $(STAGING_DIR)/usr/include/gnu |
| touch $(STAGING_DIR)/usr/include/gnu/stubs.h |
| endef |
| endif |
| |
| # Even though we use the autotools-package infrastructure, we have to |
| # override the default configure commands for several reasons: |
| # |
| # 1. We have to build out-of-tree, but we can't use the same |
| # 'symbolic link to configure' used with the gcc packages. |
| # |
| # 2. We have to execute the configure script with bash and not sh. |
| # |
| # Note that as mentionned in |
| # http://patches.openembedded.org/patch/38849/, eglibc/glibc must be |
| # built with -O2, so we pass our own CFLAGS and CXXFLAGS below. |
| define GLIBC_CONFIGURE_CMDS |
| mkdir -p $(@D)/build |
| # Do the configuration |
| (cd $(@D)/build; \ |
| $(TARGET_CONFIGURE_OPTS) \ |
| CFLAGS="-O2 $(GLIBC_EXTRA_CFLAGS)" CPPFLAGS="" \ |
| CXXFLAGS="-O2 $(GLIBC_EXTRA_CFLAGS)" \ |
| $(SHELL) $(@D)/$(GLIBC_SRC_SUBDIR)/configure \ |
| ac_cv_path_BASH_SHELL=/bin/bash \ |
| libc_cv_forced_unwind=yes \ |
| libc_cv_ssp=no \ |
| --target=$(GNU_TARGET_NAME) \ |
| --host=$(GNU_TARGET_NAME) \ |
| --build=$(GNU_HOST_NAME) \ |
| --prefix=/usr \ |
| --enable-shared \ |
| $(if $(BR2_SOFT_FLOAT),--without-fp,--with-fp) \ |
| $(if $(BR2_x86_64),--enable-lock-elision) \ |
| --with-pkgversion="Buildroot" \ |
| --without-cvs \ |
| --disable-profile \ |
| --without-gd \ |
| --enable-obsolete-rpc \ |
| --with-headers=$(STAGING_DIR)/usr/include) |
| $(GLIBC_ADD_MISSING_STUB_H) |
| endef |
| |
| |
| # |
| # We also override the install to target commands since we only want |
| # to install the libraries, and nothing more. |
| # |
| |
| GLIBC_LIBS_LIB = \ |
| ld*.so.* libc.so.* libcrypt.so.* libdl.so.* libgcc_s.so.* libm.so.* \ |
| libnsl.so.* libpthread.so.* libresolv.so.* librt.so.* libutil.so.* \ |
| libnss_files.so.* libnss_dns.so.* |
| |
| ifeq ($(BR2_PACKAGE_GDB),y) |
| GLIBC_LIBS_LIB += libthread_db.so.* |
| endif |
| |
| define GLIBC_INSTALL_TARGET_CMDS |
| for libs in $(GLIBC_LIBS_LIB); do \ |
| $(call copy_toolchain_lib_root,$(STAGING_DIR)/,,lib,$$libs,/lib) ; \ |
| done |
| endef |
| |
| # MIPS R6 requires to have NaN2008 support which is currently not |
| # supported by the Linux kernel. In order to prevent building the |
| # glibc against kernels not having NaN2008 support on platforms that |
| # requires it, glibc currently checks for an (inexisting) 10.0.0 |
| # kernel headers version. |
| # |
| # Since in practice the kernel support for NaN2008 is not really |
| # required for things to work properly, we adjust the glibc check to |
| # make it believe that NaN2008 support was added in the kernel |
| # starting from version 4.0.0. |
| # |
| # In general the compatibility issues introduced by mis-matched NaN |
| # encodings will not cause a problem as signalling NaNs are rarely used |
| # in average code. For MIPS R6 there isn't actually any compatibility |
| # issue as the hardware is always NaN2008 and software is always |
| # NaN2008. The problem only comes from when older MIPS code is linked in |
| # via a DSO and multiple NaN encodings are introduced. Since Buildroot |
| # is intended to have all code built from source then this scenario is |
| # highly unlikely. The failure mode, if it ever occurs, would be either |
| # that a signalling NaN fails to raise an invalid operation exception or |
| # (more likely) an ordinary NaN raises an invalid operation exception. |
| ifeq ($(BR2_mips_32r6)$(BR2_mips_64r6),y) |
| define GLIBC_FIX_MIPS_R6 |
| $(SED) 's#10.0.0#4.0.0#' \ |
| $(@D)/sysdeps/unix/sysv/linux/mips/configure \ |
| $(@D)/sysdeps/unix/sysv/linux/mips/configure.ac |
| endef |
| GLIBC_POST_EXTRACT_HOOKS += GLIBC_FIX_MIPS_R6 |
| endif |
| |
| $(eval $(autotools-package)) |