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| author | Matthew Lugg <mlugg@mlugg.co.uk> | 2025-11-10 12:56:35 +0000 |
|---|---|---|
| committer | Matthew Lugg <mlugg@mlugg.co.uk> | 2025-11-10 12:56:35 +0000 |
| commit | 13993c4f62d8603aa5a25de70e2d111a01cbfaab (patch) | |
| tree | f6148a9c44f6acb600086675a59a9704c6d99230 /src/main.zig | |
| parent | 6d280dc1b0779209b4790da9e939d8254d11348a (diff) | |
| download | zig-13993c4f62d8603aa5a25de70e2d111a01cbfaab.tar.gz zig-13993c4f62d8603aa5a25de70e2d111a01cbfaab.zip | |
compiler: warn when using -fincremental with LLVM backend
This configuration hasn't had much work put into it yet, so is all but
guaranteed to miscompile or crash. Since users are starting to try out
`-fincremental`, and LLVM is still the default backend in many cases,
it's worth having this warning to avoid bug reports like
https://github.com/ziglang/zig/issues/25873.
Diffstat (limited to 'src/main.zig')
| -rw-r--r-- | src/main.zig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/main.zig b/src/main.zig index 0f2a0a225c..52bb4b9c4e 100644 --- a/src/main.zig +++ b/src/main.zig @@ -3360,6 +3360,10 @@ fn buildOutputType( fatal("--debug-incremental requires -fincremental", .{}); } + if (incremental and create_module.resolved_options.use_llvm) { + warn("-fincremental is currently unsupported by the LLVM backend; crashes or miscompilations are likely", .{}); + } + const cache_mode: Compilation.CacheMode = b: { // Once incremental compilation is the default, we'll want some smarter logic here, // considering things like the backend in use and whether there's a ZCU. |