readme: update support table

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Andrew Kelley 2018-11-27 11:27:45 -05:00
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@ -42,33 +42,71 @@ clarity.
* In addition to creating executables, creating a C library is a primary use
case. You can export an auto-generated .h file.
### Support Table
### Supported Targets
Freestanding means that you do not directly interact with the OS
or you are writing your own OS.
#### Tier 1 Support
Note that if you use libc or other libraries to interact with the OS,
that counts as "freestanding" for the purposes of this table.
* Not only can Zig generate machine code for these targets, but the standard
library cross-platform abstractions have implementations for these targets.
Thus it is practical to write a pure Zig application with no dependency on
libc.
* The CI server automatically tests these targets on every commit to master
branch, and updates ziglang.org/download with links to pre-built binaries.
* These targets have debug info capabilities and therefore produce stack
traces on failed assertions.
| | freestanding | linux | macosx | windows | other |
|-------------|--------------|---------|---------|---------|---------|
|i386 | OK | planned | OK | planned | planned |
|x86_64 | OK | OK | OK | OK | planned |
|arm | OK | planned | planned | planned | planned |
|bpf | OK | planned | N/A | N/A | planned |
|hexagon | OK | planned | N/A | N/A | planned |
|mips | OK | planned | N/A | N/A | planned |
|powerpc | OK | planned | N/A | N/A | planned |
|r600 | OK | planned | N/A | N/A | planned |
|amdgcn | OK | planned | N/A | N/A | planned |
|sparc | OK | planned | N/A | N/A | planned |
|s390x | OK | planned | N/A | N/A | planned |
|spir | OK | planned | N/A | N/A | planned |
|lanai | OK | planned | N/A | N/A | planned |
|wasm32 | planned | N/A | N/A | N/A | N/A |
|wasm64 | planned | N/A | N/A | N/A | N/A |
|riscv32 | planned | planned | N/A | N/A | planned |
|riscv64 | planned | planned | N/A | N/A | planned |
#### Tier 2 Support
* There may be some standard library implementations, but many abstractions
will give an "Unsupported OS" compile error. One can link with libc or other
libraries to fill in the gaps in the standard library.
* These targets are known to work, but are not automatically tested, so there
are occasional regressions.
* Some tests may be disabled for these targets as we work toward Tier 1
support.
#### Tier 3 Support
* The standard library has little to no knowledge of the existence of this
target.
* Because Zig is based on LLVM, it has the capability to build for these
targets, and LLVM has the target enabled by default.
* These targets are not frequently tested; one will likely need to contribute
to Zig in order to build for these targets.
* The Zig compiler might need to be updated with a few things such as
- what sizes are the C integer types
- C ABI calling convention for this target
- bootstrap code and default panic handler
#### Tier 4 Support
* Support for these targets is entirely experimental.
* LLVM may have the target as an experimental target, which means that you
need to use Zig-provided binaries for the target to be available, or
build LLVM from source with special configure flags.
#### Support Table
| | freestanding | linux | macosx | windows | freebsd | other |
|--------|--------------|--------|--------|---------|---------|--------|
|x86_64 | Tier 2 | Tier 1 | Tier 1 | Tier 1 | Tier 3 | Tier 3 |
|i386 | Tier 2 | Tier 2 | Tier 2 | Tier 2 | Tier 3 | Tier 3 |
|arm | Tier 2 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 3 |
|arm64 | Tier 2 | Tier 2 | Tier 3 | Tier 3 | Tier 3 | Tier 3 |
|bpf | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|hexagon | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|mips | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|powerpc | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|r600 | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|amdgcn | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|sparc | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|s390x | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|spir | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|lanai | Tier 3 | Tier 3 | N/A | N/A | Tier 3 | Tier 3 |
|wasm32 | Tier 4 | N/A | N/A | N/A | N/A | N/A |
|wasm64 | Tier 4 | N/A | N/A | N/A | N/A | N/A |
|riscv32 | Tier 4 | Tier 4 | N/A | N/A | Tier 4 | Tier 4 |
|riscv64 | Tier 4 | Tier 4 | N/A | N/A | Tier 4 | Tier 4 |
## Community