lib/std/Build/Cache.zig | 154 +++++++++++++++++++++++++-------
 lib/std/Build/Step.zig  |  23 +++--
 lib/std/posix.zig       |   6 ++
 src/Compilation.zig     |  31 +++++--
 src/Zcu/PerThread.zig   |  34 ++++++-
 src/link.zig            |   2 +-
 6 files changed, 201 insertions(+), 49 deletions(-)