Comments (2)
dtolnay
commented on June 25, 2024
The current approach was put in place before serde_json had a build.rs. But now we have a build.rs anyway for a different reason, that might be a better place to do this check, if it can produce a good enough error.
With #1124:
error: serde_json requires that either `std` (default) or `alloc` feature is enabled
--> serde-json/src/lib.rs:367:1
|
367 | / compile_error! {
368 | | "serde_json requires that either `std` (default) or `alloc` feature is enabled"
369 | | }
| |_^
error: could not compile `serde_json` (lib) due to 1 previous errorInstead with this code in build.rs:
if cfg!(not(any(feature = "std", feature = "alloc"))) {
eprintln!("serde_json requires that either `std` (default) or `alloc` feature is enabled");
process::exit(1);
}error: failed to run custom build command for `serde_json v1.0.115`
Caused by:
process didn't exit successfully: `target/debug/build/serde_json-9e37cf325e9030a2/build-script-build` (exit status: 1)
--- stderr
serde_json requires that either `std` (default) or `alloc` feature is enabledfrom json.
dtolnay
commented on June 25, 2024
Some old workarounds that we could drop if build.rs does the check, meaning the library code would never even begin to build with an invalid combination of features: #643.
from json.
Related Issues (20)
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from json.