This diff adds initial support for the legacy LC_VERSION_MIN_* load commands.
Test plan: make check-lld-macho
Differential revision: https://reviews.llvm.org/D100523
The Mach kernel & codesign on arm64 macOS has strict requirements for alignment and sequence of segments and sections. Dyld probably is just as picky, though kernel & codesign reject malformed Mach-O files before dyld ever has a chance.
I developed this diff by incrementally changing alignments & sequences to match the output of ld64. I stopped when my hello-world test program started working: `codesign --verify` succeded, and `execve(2)` didn't immediately fail with `errno == EBADMACHO` = `"Malformed Mach-O file"`.
Differential Revision: https://reviews.llvm.org/D94935
This makes the test introduced in 537f5483fe more robust with respect
to the actual version number. The previous regex restricted the version
to start with a leading `1` which was overly restrictive.
Alexander Shaposhnikov