[staticfloat]

Adds typed load commands for LC_VERSION_MIN_{MACOSX,IPHONEOS,TVOS,WATCHOS} (MachOVersionMinCmd) and LC_BUILD_VERSION (MachOBuildVersionCmd), which were previously read as MachOUnknownCmd, along with the missing LC_LINKER_OPTIMIZATION_HINT, LC_VERSION_MIN_TVOS, LC_VERSION_MIN_WATCHOS, LC_NOTE and LC_BUILD_VERSION constants and the PLATFORM_* identifiers.

New exported accessors, defined on the load commands, their refs, and on a MachOHandle (returning nothing when no such command is present):

• min_os_version(x)::Union{VersionNumber,Nothing}
• sdk_version(x)::Union{VersionNumber,Nothing}
• build_platform(x)::Union{UInt32,Nothing} (a PLATFORM_* value)

julia> oh = only(readmeta(open("test/libjulias/libjulia.1.10.10.dylib")));

julia> min_os_version(oh), sdk_version(oh), build_platform(oh) == MachO.PLATFORM_MACOS
(v"11.0.0", v"13.3.0", true)

Tests cover LC_VERSION_MIN_MACOSX in the existing mac64/macfat fixtures and LC_BUILD_VERSION in the arm64 libjulia fixture.

Also bumps the version to 0.6.1.

Motivation: BinaryBuilder2's toolchain tests need to check the deployment target of built Mach-O files without parsing load commands by hand.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Jnarj1zM4Bdd5y4XcS7DFQ

[codecov]

Codecov Report

❌ Patch coverage is 84.84848% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.21%. Comparing base (036c99a) to head (7a791c8).

Files with missing lines	Patch %	Lines
src/MachO/LoadCmds/VersionCmds.jl	84.84%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #67      +/-   ##
==========================================
+ Coverage   72.32%   73.21%   +0.89%     
==========================================
  Files          47       48       +1     
  Lines        1514     1572      +58     
==========================================
+ Hits         1095     1151      +56     
- Misses        419      421       +2     

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