Zig's format system is flexible enough to add custom formatters. This PR removes the new z/Z format specifiers that were added for printing Zig identifiers and replaces them with custom formatters.
This broke build scripts that wanted to refer to `exe_dir` or
`install_path`.
There has also been some pushback and discussion on this breaking
change. I think it should be re-evaluated.
This reverts commit a1a1929cf4ff979bdaba17f858d4ce8647e87a65.
* Field global_cache_root was added to Builder struct along with
mandatory argument for build_runner.zig. Logic for using the custom
global cache was also added.
* The arguments --cache-dir and --global-cache-dir are no longer passed
directly through to build_runner.zig and are instead only passed through the
mandatory cache_root and global_cache_root arguments.
The main idea here is that there are now 2 ways to get a stage1 zig
binary:
* The cmake path. Requirements: cmake, system C++ compiler, system
LLVM, LLD, Clang libraries, compiled by the system C++ compiler.
* The zig path. Requirements: a zig installation, system LLVM, LLD,
Clang libraries, compiled by the zig installation.
Note that the former can be used to now take the latter path.
Removed config.h.in and config.zig.in. The build.zig script no longer is
coupled to the cmake script.
cmake no longer tries to determine the zig version. A build with cmake
will yield a stage1 zig binary that reports 0.0.0+zig0. This is going to
get reverted.
`zig build` now accepts `-Dstage1` which will build the stage1 compiler,
and put the stage2 backend behind a feature flag.
build.zig is simplified to only support the use case of enabling LLVM
support when the LLVM, LLD, and Clang libraries were built by zig. This
part is probably sadly going to have to get reverted to make package
maintainers happy.
Zig build system addBuildOption supports a couple new types.
The biggest reason to make this change is that the zig path is an
attractive option for doing compiler development work on Windows. It
allows people to work on the compiler without having MSVC installed,
using only a .zip file that contains Zig + LLVM/LLD/Clang libraries.
commit 9d1816111d1d30e18b8cb43a4aa31c194fb204c4 used the "output path"
as the path for passing shared library artifact paths to the Zig CLI.
For Windows, this was incorrect because it would pass the .dll instead
of the .lib file. This commit passes the "output lib path" instead,
which makes it pass the .lib path in case of a .dll on Windows.
This way the linker does not complain and say, "bad file type. Did you
specify a DLL instead of an import library?"
* it is now -fcompiler-rt and -fno-compiler-rt to override the (quite
reasonable) default of bundling compiler-rt only for executables and
dynamic libraries.
- the build.zig API is still called bundle_compiler_rt however it is
now an optional bool instead of a bool. leaving it as `null` means
to use the compiler default.
* renamed some internal identifiers to make the source more readable
* additionally support -fcompiler-rt when doing build-obj for ELF files
since that target already supports linking multiple objects into one.
- includes an error message when attempting this for non-ELF. in the
future this could additionally be supported with a more advanced
implementation that does not rely on the linker.
* properly populate the linker cache hash
It is now possible to force linking with system linker `ld` instead
of the LLVM `lld` linker when building natively on the target. This
can be done at each stage by specifying `--system-linker-hack` flag,
and can be useful on platforms where `lld` fails to operate properly
such as macOS 11 Big Sur on ARM64 where every binary/dylib is expected
to be codesigned.
Some example invocations for each stage of compilation of Zig
toolchain:
```
cmake .. -DCMAKE_PREFIX_PATH=/path/to/llvm -DSYSTEM_LINKER_HACK=1
```
```
build/zig build test --system-linker-hack
```
```
build/zig build --prefix $(pwd)/stage2 -Denable-llvm
--system-linker-hack
```
```
build/zig build-exe hello.zig --system-linker-hack
```
mimics the duplication of strings in `Builder` for `Pkg`. This
ensures the lifetime of the memory backing strings in a `Pkg`
struct and the `Pkg.dependencies` slice is not shorter than the
`Builder` that the data is associated with.
Before this it was trying to copy all the files from the zig-cache dir
to the output dir, but in the current compiler architecture the cache
dir is also used for internal compiler files.
See #6552#6553#6483
Also fixes a regression introduced in
1d777e99588be047ec4d7650f048b043d6e52da0 of not converting an integer to
a string for a command line parameter.
This is convenient for debugging purposes, as well as simplifying the
caching system since executable basenames will not conflict with their
corresponding object files.
