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From GCC's standpoint ARC's multilib items are defined by "mcpu" values which we have quite a few and for all of them might be built optimized cross-toolchain. From Glibc's standpoint multilib is just multi-ABI [1] and so very limited versions are supposed to co-exist (e.g. arc700 & archs). Here we force Glibc to install libraries in GCC's multilib folder to create a universal cross-toolchain that has libs optimized for multiple CPU types. But note we only need to mess with installation paths in case of real multilib, otherwise we keep default "lib/" paths so that GCC finds default (the one and only) libs where it expects them to be. Also here we add a sample which allows to build universal Glibc Linux toolchain for ARC. [1] https://sourceware.org/ml/libc-alpha/2019-06/msg00018.html Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
68 lines
1.8 KiB
Bash
68 lines
1.8 KiB
Bash
# Compute ARC-specific values
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CT_DoArchTupleValues()
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{
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# The architecture part of the tuple:
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CT_TARGET_ARCH="${CT_ARCH}${CT_ARCH_SUFFIX:-${target_endian_eb}}"
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}
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CT_DoArchUClibcConfig()
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{
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local cfg="${1}"
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CT_DoArchUClibcSelectArch "${cfg}" "arc"
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}
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CT_DoArchUClibcCflags()
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{
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local cfg="${1}"
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local cflags="${2}"
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local f
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CT_KconfigDisableOption "CONFIG_ARC_HAS_ATOMICS" "${cfg}"
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for f in ${cflags}; do
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case "${f}" in
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-matomic)
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CT_KconfigEnableOption "CONFIG_ARC_HAS_ATOMICS" "${cfg}"
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;;
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esac
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done
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}
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# Multilib: Adjust configure arguments for GLIBC
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# Usage: CT_DoArchGlibcAdjustConfigure <configure-args-array-name> <cflags>
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#
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# From GCC's standpoint ARC's multilib items are defined by "mcpu" values
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# which we have quite a few and for all of them might be built optimized
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# cross-toolchain.
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#
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# From Glibc's standpoint multilib is multi-ABI and so very limited
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# versions are supposed to co-exist.
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#
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# Here we force Glibc to install libraries in per-multilib folder to create
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# a universal cross-toolchain that has libs optimized for multiple CPU types.
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CT_DoArchGlibcAdjustConfigure() {
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local -a add_args
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local array="${1}"
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local cflags="${2}"
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local opt
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local mcpu
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# If building for multilib, set proper installation paths
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if [ "${CT_MULTILIB}" = "y" ]; then
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for opt in ${cflags}; do
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case "${opt}" in
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-mcpu=*)
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mcpu="${opt#*=}"
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add_args+=( "libc_cv_rtlddir=/lib/${mcpu}" )
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add_args+=( "libc_cv_slibdir=/lib/${mcpu}" )
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add_args+=( "--libdir=/usr/lib/${mcpu}" )
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;;
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esac
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done
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fi
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eval "${array}+=( \"\${add_args[@]}\" )"
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}
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