Cross Toolchain Survey (June, 2025)

[MingcongBai]

Topic Description

• gcc+cross: update to 14.3.0+glibc2.40+3
  • Sync patches with core-devel/gcc.
  • Add arm-none-eabi target per user request.
  • Install symlinks of triple-prefixed tools to /usr/bin.
  • Disable RISC-V cross toolchain for MIPS, as its code seem too large to
    handle even with LTO disabled.
• binutils: update to 2.44
  • Revise sed invocations into patches.
  • Add arm-none-eabi target per user request.
  • Use GNU as the default hash style. [^1]
  • Backport a fix for poor linker relaxation performance. [^2]
  • Track patches at AOSC-Tracking/binutils-gdb @ aosc/binutils-2_44
    (HEAD: 072457058d06965a634c35c44b6ecc3c62609e56).
    [^1]: Override the default value "both" which causes ld to generate both
    DT_HASH and DT_GNU_HASH for link units. Those hash tables are only
    intended for ld.so, and Glibc ld.so has got the DT_GNU_HASH support
    in 2006. Since then if both DT_HASH and DT_GNU_HASH exists, the
    former is completely ignored thus it's just wasting disk space.
    One blockage for this was the combination of MIPS and ld.gold: MIPS
    uses DT_MIPS_XHASH that ld.gold does not support, instead of
    DT_GNU_HASH. The blockage is resolved now as ld.gold is removed.
    Another blockage is some closed-source non-cooperating program is
    (was?) (mis-)using DT_HASH for some strange purpose. Fortunately
    the program seems only relying on DT_HASH in Glibc, so even if the
    program is still not fixed and we still have to support it, we can
    just enable it for Glibc instead of every package.
    Link: https://wiki.linuxfromscratch.org/lfs/ticket/5401
    Link: https://maskray.me/blog/2022-08-21-glibc-and-dt-gnu-hash
    [^2]: https://sourceware.org/pipermail/binutils/2025-June/141825.html
    Co-authored-by: Xi Ruoyao [email protected]

Package(s) Affected

• binutils: 2.44
• binutils+cross-amd64: 2.44
• binutils+cross-arm-none-eabi: 2.44
• binutils+cross-arm64: 2.44
• binutils+cross-loongarch64: 2.44
• binutils+cross-loongson3: 2.44
• binutils+cross-ppc64el: 2.44
• binutils+cross-riscv64: 2.44
• gcc+cross-amd64: 14.3.0+glibc2.40+3
• gcc+cross-arm-none-eabi: 14.3.0+glibc2.40+3
• gcc+cross-arm64: 14.3.0+glibc2.40+3
• gcc+cross-loongarch64: 14.3.0+glibc2.40+3
• gcc+cross-loongson3: 14.3.0+glibc2.40+3
• gcc+cross-ppc64el: 14.3.0+glibc2.40+3
• gcc+cross-riscv64: 14.3.0+glibc2.40+3

Security Update?

No

Build Order

#buildit binutils gcc+cross

Test Build(s) Done

Primary Architectures

• AMD64 amd64
• AArch64 arm64
• LoongArch 64-bit loongarch64

Secondary Architectures

• Loongson 3 loongson3
• PowerPC 64-bit (Little Endian) ppc64el
• RISC-V 64-bit riscv64

[xry111]

82e173a5fd22bbb1b43cbc199aeca510.mp4

Tested by building https://github.com/libopencm3/libopencm3-examples/tree/master/examples/stm32/f3/stm32f3-discovery/fancyblink on LoongArch.