lib/std/build.zig                |   6 +
 lib/std/build/CheckMachOStep.zig | 210 ++++++++++++++++++++++++++++++++
 test/link/dylib/build.zig        |  42 +++++--
 test/link/pagezero/build.zig     |  66 ++++++----
 4 files changed, 291 insertions(+), 33 deletions(-)