Normally we rely on importing std to in turn import the root
in the start code, but when using the stage1 won't happen,
so in order to run AstGen on the root we put it into the
import_table here.
There is now a distinction between `@import` with a .zig extension and
without. Without a .zig extension it assumes it is a package name, and
returns error.PackageNotFound if not mapped into the package table.
This change reduces the amount of divergence in the compiler's main
pipeline logic enough to run AstGen for all files in the compilation,
regardless of whether the stage1 or stage2 backend is being used.
Practically, this means that all Zig code is subject to new compile
errors, such as unused local variables.
Additionally:
* remove leftover unsound asserts from recent hash map changes
* fix sub-Compilation errors not indenting correctly
Previously, Zig did not properly communicate the target CPU features for
RISC-V to clang assembler, because Clang has a different way to pass CPU
features for C code and for assembly code. This commit makes Zig pass a
RISC-V -march flag in order to communicate CPU features to Clang when
compiling assembly files.
* stage1 backend allows configuring the uwtables function attr
via a flag rather than its own logic.
* stage2 defaults to enabling uwtable attr when
linking libunwind, or always on windows
* stage2 makes link_eh_frame_hdr true automatically if uwtable
attr is set to be on for zig functions
* CLI: add -funwind-tables and -fno-unwind-tables to allow the user to
override the defaults.
* hook it up to `zig cc`
closes#9046
closes#9034
These options were listed under the
"Debug Options (Zig Compiler Development)" heading. Anything in this
section should be considered unstable and can be modified at any time
at any developer's discretion.
* then, in `link/Wasm.zig` map `CRTFile` to full emulated libs name
* move logic for removing any mention of WASI snapshot
`wasi_snapshot_preview1` from `Compilation.zig` into `link/Wasm.zig`
Move parsing of system libs into `main.zig` next to where we decide
if we should link libC, and, if targeting WASI, if the specified
libname equals one of the emulated components, save it on the side
and remove it from the system libs. Then, build *only* those parts
of WASI libc that were preserved in the previous step.
This also fixes building of different crt1 bits needed to support
reactors and commands.
- hash/eql functions moved into a Context object
- *Context functions pass an explicit context
- *Adapted functions pass specialized keys and contexts
- new getPtr() function returns a pointer to value
- remove functions renamed to fetchRemove
- new remove functions return bool
- removeAssertDiscard deleted, use assert(remove(...)) instead
- Keys and values are stored in separate arrays
- Entry is now {*K, *V}, the new KV is {K, V}
- BufSet/BufMap functions renamed to match other set/map types
- fixed iterating-while-modifying bug in src/link/C.zig
Clang has a completely inconsistent CLI for its integrated assembler for
each target architecture. For x86_64, for example, it does not accept
an -mcpu parameter, and emits "warning: unused parameter". However, for
ARM, -mcpu is needed in order to properly lower assembly to machine code
instructions (see new standalone test case provided thanks to @g-w1).
This is a compromise between
b8f85a805bf61ae11d6ee2bd6d8356fbc98ee3ba and
afb9f695b1bdbf81185e7d55d5783bcbab880989.
This reverts commit afb9f695b1bdbf81185e7d55d5783bcbab880989.
I don't think this was ever actually verified to fix the thing it
purported to, and it started causing warnings for unused command line
parameters.
- more support for linux, android, freebsd, netbsd, openbsd, dragonfly
- centralize musl utils; musl logic is no longer intertwined with csu
- fix musl compilation to build crti/crtn for full archs list
- fix openbsd to support `zig build-lib -dynamic`
- initial dragonfly linking success (with a warning)
ancillary:
- fix emutls (openbsd) tests to use `try`
This matches the behaviour of other languages and leaves us
the ability to create actual static Wasm archives with
```
zig build-lib -static some.zig
```
which can then be combined with other Wasm object files and linked
into either a Wasm lib or executable using `wasm-ld`.
Update langref to reflect the fact we now ship WASI libc.
Rename include dir to match the convention:
from `wasm32-wasi` to `wasm-wasi-musl`
Add building stubs which will be used to build and cache WASI
libc sysroot.
We do need to link the system libc if linking system libraries as
they may potentially be compiled against e.g. a newer glibc version
than zig can provide. However if not linking system libraries, using
the zig provided libc is more reliable as it does not depend on any
quirks of the host system or being able to invoke the system cc to
find include dirs.
When scanDecls happens, we create stub Decl objects that
have not been semantically analyzed. When they get referenced,
they get semantically analyzed.
Before this commit, when they got unreferenced, they were completely
deleted, including deleted from the containing Namespace.
However, if the update did not cause the containing Namespace to get
deleted, for example, if `std.builtin.ExportOptions` is no longer
referenced, but `std.builtin` is still referenced, and then `ExportOptions`
gets referenced again, the Namespace would be incorrectly missing the
Decl, so we get an incorrect "no such member" error.
The solution is to, when dealing with a no longer referenced Decl
objects during an update, clear them to the state they would be in
on a fresh scanDecl, rather than completely deleting them.
Previously, stage2 used a global decl_table for all Decl objects, keyed
by a 16-byte name hash that was hopefully unique. Now, there is a tree
of Namespace objects that own their named Decl objects.
Conflicts:
* build.zig
* src/Compilation.zig
* src/codegen/spirv/spec.zig
* src/link/SpirV.zig
* test/stage2/darwin.zig
- this one might be problematic; start.zig looks for `main` in the
root source file, not `_main`. Not sure why there is an underscore
there in master branch.
Just like when new parse errors occur during an update, when new AstGen
errors occur during an update, we do not reveal compile errors for Decl
objects which are inside of a newly failed File. Once the File passes
AstGen successfully, it will be compared with the previously succeeded
ZIR and the saved Decl compile errors will be handled properly.
Previously, compile log stored full SrcLoc info, which included absolute
AST node index. This becomes invalid after an incremental compilation.
To make it survive incremental compilation, store an offset from parent
Decl instead.
* Do not report export collision errors until the very end, because it
is possible, during an update, for a new export to be added before an
old one is semantically analyzed to be deleted. In such a case there
should be no compile error.
- Likewise we defer emitting exports until the end when we know for
sure what will happen.
* Sema: Fix not adding a Decl dependency on imported files.
* Sema: Properly add Decl dependencies for all identifier and namespace
lookups.
* After semantic analysis for a Decl, if it is still marked as
`in_progress`, change it to `dependency_failure` because if the Decl
itself failed, it would have already been changed during the call to
add the compile error.
* `-lc++` now implies `-lc`.
* `-lunwind` is now pulled out into a separate `link_libunwind` flag in
the frontend driver code. This allows a project to request zig to
provide libunwind even if the default situation that causes it to be
implicitly added, is not active.
* build.zig: ask for -lunwind when building the self-hosted compiler on
Linux. Otherwise we get linker errors with unresolved symbols to
libunwind.
