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d7b043e360
Document the status quo and work around for mips-musl. Signed-off-by: Alexey Neyman <stilor@att.net>
91 lines
3.4 KiB
Bash
91 lines
3.4 KiB
Bash
# Compute MIPS-specific values
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CT_DoArchTupleValues() {
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# The architecture part of the tuple
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CT_TARGET_ARCH="${CT_ARCH}${target_bits_64}${CT_ARCH_SUFFIX:-${target_endian_el}}"
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# Override CFLAGS for endianness:
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case "${CT_ARCH_ENDIAN}" in
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big) CT_ARCH_ENDIAN_CFLAG="-EB";;
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little) CT_ARCH_ENDIAN_CFLAG="-EL";;
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esac
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# Override ABI flags
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CT_ARCH_ABI_CFLAG="-mabi=${CT_ARCH_mips_ABI}"
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CT_ARCH_WITH_ABI="--with-abi=${CT_ARCH_mips_ABI}"
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}
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CT_DoArchUClibcConfig() {
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local cfg="${1}"
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CT_DoArchUClibcSelectArch "${cfg}" "${CT_ARCH}"
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CT_KconfigDisableOption "CONFIG_MIPS_O32_ABI" "${cfg}"
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CT_KconfigDisableOption "CONFIG_MIPS_N32_ABI" "${cfg}"
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CT_KconfigDisableOption "CONFIG_MIPS_N64_ABI" "${cfg}"
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case "${CT_ARCH_mips_ABI}" in
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32)
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CT_KconfigEnableOption "CONFIG_MIPS_O32_ABI" "${cfg}"
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;;
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n32)
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CT_KconfigEnableOption "CONFIG_MIPS_N32_ABI" "${cfg}"
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;;
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64)
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CT_KconfigEnableOption "CONFIG_MIPS_N64_ABI" "${cfg}"
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;;
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esac
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# FIXME: uClibc (!ng) allows to select ISA in the config; should
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# match from the selected ARCH_ARCH level... For now, delete and
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# fall back to default.
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CT_KconfigDeleteOption "CONFIG_MIPS_ISA_1" "${cfg}"
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CT_KconfigDeleteOption "CONFIG_MIPS_ISA_2" "${cfg}"
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CT_KconfigDeleteOption "CONFIG_MIPS_ISA_3" "${cfg}"
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CT_KconfigDeleteOption "CONFIG_MIPS_ISA_4" "${cfg}"
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CT_KconfigDeleteOption "CONFIG_MIPS_ISA_MIPS32" "${cfg}"
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CT_KconfigDeleteOption "CONFIG_MIPS_ISA_MIPS32R2" "${cfg}"
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CT_KconfigDeleteOption "CONFIG_MIPS_ISA_MIPS64" "${cfg}"
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CT_KconfigDeleteOption "CONFIG_MIPS_ISA_MIPS64R2" "${cfg}"
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}
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CT_DoArchUClibcCflags() {
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local cfg="${1}"
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local cflags="${2}"
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local f
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for f in ${cflags}; do
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case "${f}" in
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-mabi=*)
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CT_KconfigDisableOption "CONFIG_MIPS_O32_ABI" "${cfg}"
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CT_KconfigDisableOption "CONFIG_MIPS_N32_ABI" "${cfg}"
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CT_KconfigDisableOption "CONFIG_MIPS_N64_ABI" "${cfg}"
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case "${f#-mabi=}" in
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32) CT_KconfigEnableOption "CONFIG_MIPS_O32_ABI" "${cfg}";;
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n32) CT_KconfigEnableOption "CONFIG_MIPS_N32_ABI" "${cfg}";;
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64) CT_KconfigEnableOption "CONFIG_MIPS_N64_ABI" "${cfg}";;
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*) CT_Abort "Unsupported ABI: ${f#-mabi=}";;
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esac
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;;
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esac
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done
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}
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CT_DoArchMUSLPostInstall() {
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# GDB and MUSL maintainers seem to disagree on whether <sgidefs.h>
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# is to be provided as a part of C library. GDB guys think it is
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# a C library responsibility, while MUSL authors think GDB should
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# not be using <sgidefs.h>. Neither side is willing to reach out
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# to the other and negotiate the needed changes, and I don't want
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# to play the middle man. Hence, provide our own wrapper for
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# for <sgidefs.h> - the only solution short of telling MUSL users
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# stop using it. This is why MUSL is experimental in ct-ng and
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# will likely remain in that status.
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# References:
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# http://www.openwall.com/lists/musl/2017/01/26/2
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# https://sourceware.org/ml/gdb-patches/2017-01/msg00469.html
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# https://www.sourceware.org/ml/libc-alpha/2004-11/msg00034.html
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if [ ! -r "${CT_HEADERS_DIR}/sgidefs.h" ]; then
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echo "#include <asm/sgidefs.h> // Redirected by ct-ng" > "${CT_HEADERS_DIR}/sgidefs.h"
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fi
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}
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