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This is problematic because in practice it depends on whether the
compiler backend supports it too, as evidenced by the TODO comment about
LLVM not supporting some architectures that in fact do support tail
calls.
Instead this logic is organized strategically in src/target.zig, part of
the internal compiler source code, and the behavior tests in question
duplicate some logic for deciding whether to proceed with the test.
The proper place to expose this flag is in `@import("builtin")` - the
generated source file - so that third party compilers can advertise
whether they support tail calls.
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This commit enables `-u <symbol>` for ELF and `-include:<symbol>` for
COFF linkers for use internally. This means we do not expose these
flags to the users just yet, however, we make use of them internally
whenever required. One such use case is forcing inclusion of
`_tls_index` when linking for Windows with mingw and LTO and dead
code stripping enabled. This ensures we add `_tls_index` to the symbol
resolver as an undefined symbol and force the linker to include an atom
that provides it marking it a dead-code-stripping root - meaning it will
not be garbage collected by the linker no matter what.
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Instead, just return ChildProcess directly. This structure does not
require a stable address, so we can put it on the stack just fine. If
someone wants it on the heap they should do.
const proc = try allocator.create(ChildProcess);
proc.* = ChildProcess.init(args, allocator);
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In accordance with the requesting issue (#10750):
- `zig test` skips any tests that it cannot spawn, returning success
- `zig run` and `zig build` exit with failure, reporting the command the cannot be run
- `zig clang`, `zig ar`, etc. already punt directly to the appropriate clang/lld main(), even before this change
- Native `libc` Detection is not supported
Additionally, `exec()` and related Builder functions error at run-time, reporting the command that cannot be run
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* Annotate workarounds with their corresponding GitHub issue links.
* Enable test coverage for LTO on Windows with the added c_compiler test.
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The symbol "_tls_index" gets lost when using LTO.
Disabling LTO on the object file that defines it allows the link to work.
fixes https://github.com/ziglang/zig/issues/8531
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Fixes a frexp() segfault on Windows.
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(#9402). (#9766)
* Added fseeki64.c from mingw-w64 9.0.0. This file was missing in Zig distribution. This file contains implementation for _fseeki64 and _ftelli64 functions.
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compiler_rt functions (#9555)
* fix issue 9519
Added some missing files from mingw
* add missing compiler_rt functions
* finish PR
* add aarch64-windows-gnu to test targets
* add more compiler_rt
* add log2
* add pow
* add modti3
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The current version of code uses isARM to check if we are compiling to any arm target then checks the target bit width to either add the 32-bit sources or 64-bit source. However, isARM only returns true for 32-bit targets, and isAARCH64 is for the 64-bit targets.
I also replaced the unreachable with a @panic when we receive an unsupported arch because this code is reachable and should turn into an error.
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Putting functions in this file will create functions like
`llvm.function`, and the compiler thinks these are llvm intrinsics.
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Previously Zig would need to recompile runtime libs if you changed the
values of --strip or -O. Now, unless the `debug_compiler_runtime_libs`
flag is set (which is currently not exposed to the CLI), Zig will always
choose ReleaseFast or ReleaseSmall for compiler runtime libraries.
When the main application chooses ReleaseFast or ReleaseSmall, that
value is propagated to compiler runtime libraries. Otherwise a decision
is made based on the target, which is currently ReleaseSmall for
freestanding WebAssembly and ReleaseFast for everything else.
Ultimately the purpose of this commit is to have Debug and ReleaseSafe
builds of applications still get optimized builds of, e.g. libcxx and
libunwind, as well as to spend less time unnecessarily rebuilding compiler
runtime libraries.
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Reaplied mingw-w64 header patch
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Closes #6482
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Thanks @LemonBoy
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still TODO is the task of creating import .lib files for DLLs on the fly
both for -lfoo and for e.g. `extern "kernel32"`
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