Bump fmt from 12.1.0-codeql.1 to 12.1.0

[dependabot]

Bumps fmt from 12.1.0-codeql.1 to 12.1.0.

Release notes

Sourced from fmt's releases.

12.1.0

• Optimized buffer::append, resulting in up to ~16% improvement on spdlog benchmarks (fmtlib/fmt#4541). Thanks @​fyrsta7.

• Worked around an ABI incompatibility in std::locale_ref between clang and gcc (fmtlib/fmt#4573).

• Made std::variant and std::expected formatters work with format_as (fmtlib/fmt#4574, fmtlib/fmt#4575). Thanks @​phprus.

• Made fmt::join<string_view> work with C++ modules (fmtlib/fmt#4379, fmtlib/fmt#4577). Thanks @​Arghnews.

• Exported fmt::is_compiled_string and operator""_cf from the module (fmtlib/fmt#4544). Thanks @​CrackedMatter.

• Fixed a compatibility issue with C++ modules in clang (fmtlib/fmt#4548). Thanks @​tsarn.

• Added support for cv-qualified types to the std::optional formatter (fmtlib/fmt#4561, fmtlib/fmt#4562). Thanks @​OleksandrKvl.

• Added demangling support (used in exception and std::type_info formatters) for libc++ and clang-cl (fmtlib/fmt#4542, fmtlib/fmt#4560, fmtlib/fmt#4568, fmtlib/fmt#4571). Thanks @​FatihBAKIR and @​rohitsutreja.

• Switched to global malloc/free to enable allocator customization (fmtlib/fmt#4569, fmtlib/fmt#4570). Thanks @​rohitsutreja.

• Made the FMT_USE_CONSTEVAL macro configurable by users (fmtlib/fmt#4546). Thanks @​SnapperTT.

• Fixed compilation with locales disabled in the header-only mode (fmtlib/fmt#4550).

• Fixed compilation with clang 21 and -std=c++20 (fmtlib/fmt#4552).

• Fixed a dynamic linking issue with clang-cl (fmtlib/fmt#4576, fmtlib/fmt#4584). Thanks @​FatihBAKIR.

• Fixed a warning suppression leakage on gcc (fmtlib/fmt#4588). Thanks @​ZedThree.

• Made more internal color APIs constexpr (fmtlib/fmt#4581). Thanks @​ishani.

• Fixed compatibility with clang as a host compiler for NVCC (fmtlib/fmt#4564). Thanks @​valgur.

• Fixed various warnings and lint issues (fmtlib/fmt#4565, fmtlib/fmt#4572, fmtlib/fmt#4557). Thanks @​LiangHuDream and @​teruyamato0731.

• Improved documentation (fmtlib/fmt#4549, fmtlib/fmt#4551, fmtlib/fmt#4566, fmtlib/fmt#4567, fmtlib/fmt#4578,). Thanks @​teruyamato0731, @​petersteneteg and @​zimmerman-dev.

Changelog

Sourced from fmt's changelog.

12.1.0 - 2025-10-29

• Optimized buffer::append, resulting in up to ~16% improvement on spdlog benchmarks (fmtlib/fmt#4541). Thanks @​fyrsta7.

• Worked around an ABI incompatibility in std::locale_ref between clang and gcc (fmtlib/fmt#4573).

• Made std::variant and std::expected formatters work with format_as (fmtlib/fmt#4574, fmtlib/fmt#4575). Thanks @​phprus.

• Made fmt::join<string_view> work with C++ modules (fmtlib/fmt#4379, fmtlib/fmt#4577). Thanks @​Arghnews.

• Exported fmt::is_compiled_string and operator""_cf from the module (fmtlib/fmt#4544). Thanks @​CrackedMatter.

• Fixed a compatibility issue with C++ modules in clang (fmtlib/fmt#4548). Thanks @​tsarn.

• Added support for cv-qualified types to the std::optional formatter (fmtlib/fmt#4561, fmtlib/fmt#4562). Thanks @​OleksandrKvl.

• Added demangling support (used in exception and std::type_info formatters) for libc++ and clang-cl (fmtlib/fmt#4542, fmtlib/fmt#4560, fmtlib/fmt#4568, fmtlib/fmt#4571). Thanks @​FatihBAKIR and @​rohitsutreja.

• Switched to global malloc/free to enable allocator customization (fmtlib/fmt#4569, fmtlib/fmt#4570). Thanks @​rohitsutreja.

• Made the FMT_USE_CONSTEVAL macro configurable by users (fmtlib/fmt#4546). Thanks @​SnapperTT.

• Fixed compilation with locales disabled in the header-only mode (fmtlib/fmt#4550).

• Fixed compilation with clang 21 and -std=c++20 (fmtlib/fmt#4552).

• Fixed a dynamic linking issue with clang-cl (fmtlib/fmt#4576, fmtlib/fmt#4584). Thanks @​FatihBAKIR.

... (truncated)

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