* update to the new cache hash API
* std.Target defaultVersionRange moves to std.Target.Os.Tag
* std.Target.Os gains getVersionRange which returns a tagged union
* start the process of splitting Module into Compilation and "zig
module".
- The parts of Module having to do with only compiling zig code are
extracted into ZigModule.zig.
- Next step is to rename Module to Compilation.
- After that rename ZigModule back to Module.
* implement proper cache hash usage when compiling C objects, and
properly manage the file lock of the build artifacts.
* make versions optional to match recent changes to master branch.
* proper cache hash integration for compiling zig code
* proper cache hash integration for linking even when not compiling zig
code.
* ELF LLD linking integrates with the caching system. A comment from
the source code:
Here we want to determine whether we can save time by not invoking LLD when the
output is unchanged. None of the linker options or the object files that are being
linked are in the hash that namespaces the directory we are outputting to. Therefore,
we must hash those now, and the resulting digest will form the "id" of the linking
job we are about to perform.
After a successful link, we store the id in the metadata of a symlink named "id.txt" in
the artifact directory. So, now, we check if this symlink exists, and if it matches
our digest. If so, we can skip linking. Otherwise, we proceed with invoking LLD.
* implement disable_c_depfile option
* add tracy to a few more functions
* implement --debug-cc and --debug-link
* implement C source files having extra flags
- TODO a way to pass them on the CLI
* introduce the Directory abstraction which contains both an open file
descriptor and a file path name. The former is preferred but the
latter is needed when communicating paths over a command line (e.g.
to Clang or LLD).
* use the cache hash to choose an artifact directory
- TODO: use separate cache hash instances for the zig module and
each C object
* Module: introduce the crt_files table for keeping track of built libc
artifacts for linking.
* Add the ability to build 4/6 of the glibc static CRT lib files.
* The zig-cache directory is now passed as a parameter to Module.
* Implement the CLI logic of -femit-bin and -femit-h
- TODO: respect -fno-emit-bin
- TODO: the emit .h feature
* Add the -fvalgrind, -fstack-check, and --single-threaded CLI options.
* Implement the logic for auto detecting whether to enable PIC,
sanitize-C, stack-check, valgrind, and single-threaded.
* Properly add PIC args (or not) to clang argv.
* Implement renaming clang-compiled object files into their proper
place within the cache artifact directory.
- TODO: std lib needs a proper higher level abstraction for
std.os.renameat.
* Package is cleaned up to use the "Unmanaged" StringHashMap and use the
new Directory abstraction.
* Clean up zig lib directory detection to make proper use of directory
handles.
* Linker code invokes LLD.
- TODO properly deal with the stdout and stderr that we get from it
and expose diagnostics from the Module API that match the expected
error message format.
* Delete the bitrotted LLVM C ABI bindings. We'll resurrect just the
functions we need as we introduce dependencies on them. So far it
only has ZigLLDLink in it.
* Remove dead timer code.
* `zig env` now prints the path to the zig executable as well.
