ae99fa6d64
This enables a riscv32 system to be built with a Buildroot generated toolchain (gcc >= 7.x, binutils >= 2.30, glibc only). This requires a custom version of glibc 2.26 from the riscv-glibc repository. Note that there are no tags in this repository, so the glibc version just consists of the 40 character commit id string. Thanks to Fabrice Bellard for pointing me towards the 32-bit glibc repository and for providing the necessary patch to get it to build. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
150 lines
4.8 KiB
Makefile
150 lines
4.8 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-2018.09-release
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GLIBC_SITE = $(call github,foss-for-synopsys-dwc-arc-processors,glibc,$(GLIBC_VERSION))
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else ifeq ($(BR2_RISCV_32),y)
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GLIBC_VERSION = 4e2943456e690d89f48e6e710757dd09404b0c9a
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GLIBC_SITE = $(call github,riscv,riscv-glibc,$(GLIBC_VERSION))
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else
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# Generate version string using:
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# git describe --match 'glibc-*' --abbrev=40 origin/release/MAJOR.MINOR/master
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GLIBC_VERSION = glibc-2.28-69-g1e5c5303a522764d7e9d2302a60e4a32cdb902f1
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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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endif
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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 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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$(BR2_MAKE_HOST_DEPENDENCY)
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GLIBC_SUBDIR = build
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GLIBC_INSTALL_STAGING = YES
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GLIBC_INSTALL_STAGING_OPTS = install_root=$(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 $(STAGING_DIR)/usr/include/gnu/stubs.h
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endef
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endif
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GLIBC_CONF_ENV = \
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ac_cv_path_BASH_SHELL=/bin/bash \
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libc_cv_forced_unwind=yes \
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libc_cv_ssp=no
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# Override the default library locations of /lib64/<abi> and
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# /usr/lib64/<abi>/ for RISC-V.
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ifeq ($(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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# 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 $(GLIBC_EXTRA_CFLAGS)" \
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$(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 $(BR2_x86_64),--enable-lock-elision) \
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--with-pkgversion="Buildroot" \
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--without-cvs \
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--disable-profile \
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--without-gd \
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--enable-obsolete-rpc \
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--enable-kernel=$(call qstrip,$(BR2_TOOLCHAIN_HEADERS_AT_LEAST)) \
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--with-headers=$(STAGING_DIR)/usr/include)
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$(GLIBC_ADD_MISSING_STUB_H)
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endef
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#
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# We also override the install to target commands since we only want
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# to install the libraries, and nothing more.
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#
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GLIBC_LIBS_LIB = \
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ld*.so.* libanl.so.* libc.so.* libcrypt.so.* libdl.so.* libgcc_s.so.* \
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libm.so.* libpthread.so.* libresolv.so.* librt.so.* \
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libutil.so.* libnss_files.so.* libnss_dns.so.* libmvec.so.*
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ifeq ($(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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$(eval $(autotools-package))
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