0633eb58a2
Finally there's working ARC port of glibc thanks to Vineet and Cuper! This port is based on pretty recent glibc's master branch and ARC changes are being reviewed now in glibc's mailing list. Thus we again have to use sources from our GitHub but as soon as there's a glibc release with our patches applied we'll switch to upstream releases and will drop our glibc GitHub repo alltogether. Note now we cut tags in glibc repo simultaneously with tags in Binutils and GCC repos and so to make sure everything works in the best way we plan to update glibc tag together with Binutils and GCC. Also note as of today ARCompact (AKA ARCv1 ISA) is not supported in glibc but we plan to fix it soonish so for now we make glibc intentionally dependent on archs38. Also note we are not creating directory "2.26" because all patches for glibc ver 2.26 applies to arc glibc port. Signed-off-by: Evgeniy Didin <didin@synopsys.com> CC: Alexey Brodkin <abrodkin@synopsys.com> CC: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> CC: Waldemar Brodkorb <wbx@openadk.org> CC: Romain Naour <romain.naour@gmail.com> Cc: Cupertino Miranda <cmiranda@synopsys.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Anton Kolesov <akolesov@synopsys.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
155 lines
5.2 KiB
Makefile
155 lines
5.2 KiB
Makefile
################################################################################
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#
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# glibc
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#
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################################################################################
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ifeq ($(BR2_arc),y)
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GLIBC_VERSION = arc-2017.09-eng010
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GLIBC_SITE = $(call github,foss-for-synopsys-dwc-arc-processors,glibc,$(GLIBC_VERSION))
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GLIBC_SOURCE = glibc-$(GLIBC_VERSION).tar.gz
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else
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GLIBC_VERSION = 2.26
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GLIBC_SITE = $(BR2_GNU_MIRROR)/libc
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GLIBC_SOURCE = glibc-$(GLIBC_VERSION).tar.xz
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endif
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GLIBC_SRC_SUBDIR = .
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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 = $(addprefix $(GLIBC_SRC_SUBDIR)/,COPYING COPYING.LIB LICENSES)
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# glibc is part of the toolchain so disable the toolchain dependency
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GLIBC_ADD_TOOLCHAIN_DEPENDENCY = NO
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# Before glibc is configured, we must have the first stage
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# cross-compiler and the kernel headers
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GLIBC_DEPENDENCIES = host-gcc-initial linux-headers host-gawk
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GLIBC_SUBDIR = build
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GLIBC_INSTALL_STAGING = YES
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GLIBC_INSTALL_STAGING_OPTS = install_root=$(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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# 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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# 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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# Note that as mentionned in
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# http://patches.openembedded.org/patch/38849/, glibc must be
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# built with -O2, so we pass our own CFLAGS and CXXFLAGS below.
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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="-O2 $(GLIBC_EXTRA_CFLAGS)" CPPFLAGS="" \
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CXXFLAGS="-O2 $(GLIBC_EXTRA_CFLAGS)" \
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$(SHELL) $(@D)/$(GLIBC_SRC_SUBDIR)/configure \
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ac_cv_path_BASH_SHELL=/bin/bash \
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libc_cv_forced_unwind=yes \
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libc_cv_ssp=no \
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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 $(BR2_SOFT_FLOAT),--without-fp,--with-fp) \
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$(if $(BR2_x86_64),--enable-lock-elision) \
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--with-pkgversion="Buildroot" \
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--without-cvs \
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--disable-profile \
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--without-gd \
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--enable-obsolete-rpc \
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--enable-kernel=$(call qstrip,$(BR2_TOOLCHAIN_HEADERS_AT_LEAST)) \
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--with-headers=$(STAGING_DIR)/usr/include)
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$(GLIBC_ADD_MISSING_STUB_H)
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endef
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#
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# We also override the install to target commands since we only want
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# to install the libraries, and nothing more.
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#
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GLIBC_LIBS_LIB = \
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ld*.so.* libanl.so.* libc.so.* libcrypt.so.* libdl.so.* libgcc_s.so.* \
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libm.so.* libnsl.so.* libpthread.so.* libresolv.so.* librt.so.* \
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libutil.so.* libnss_files.so.* libnss_dns.so.* libmvec.so.*
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ifeq ($(BR2_PACKAGE_GDB),y)
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GLIBC_LIBS_LIB += libthread_db.so.*
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endif
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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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endef
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# MIPS R6 requires to have NaN2008 support which is currently not
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# supported by the Linux kernel. In order to prevent building the
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# glibc against kernels not having NaN2008 support on platforms that
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# requires it, glibc currently checks for an (inexisting) 10.0.0
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# kernel headers version.
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#
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# Since in practice the kernel support for NaN2008 is not really
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# required for things to work properly, we adjust the glibc check to
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# make it believe that NaN2008 support was added in the kernel
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# starting from version 4.0.0.
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#
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# In general the compatibility issues introduced by mis-matched NaN
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# encodings will not cause a problem as signalling NaNs are rarely used
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# in average code. For MIPS R6 there isn't actually any compatibility
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# issue as the hardware is always NaN2008 and software is always
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# NaN2008. The problem only comes from when older MIPS code is linked in
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# via a DSO and multiple NaN encodings are introduced. Since Buildroot
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# is intended to have all code built from source then this scenario is
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# highly unlikely. The failure mode, if it ever occurs, would be either
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# that a signalling NaN fails to raise an invalid operation exception or
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# (more likely) an ordinary NaN raises an invalid operation exception.
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ifeq ($(BR2_MIPS_CPU_MIPS32R6)$(BR2_MIPS_CPU_MIPS64R6),y)
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define GLIBC_FIX_MIPS_R6
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$(SED) 's#10.0.0#4.0.0#' \
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$(@D)/sysdeps/unix/sysv/linux/mips/configure \
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$(@D)/sysdeps/unix/sysv/linux/mips/configure.ac
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endef
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GLIBC_POST_EXTRACT_HOOKS += GLIBC_FIX_MIPS_R6
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endif
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$(eval $(autotools-package))
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