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pablosichert avatar pablosichert commented on July 24, 2024

@ealmloff pointed me to the following locations of interest where dioxus sets the rustflags:

dioxus/packages/cli/src/builder.rs

Line 116 in 1ec6819

.set_rust_flags(rust_flags)

dioxus/packages/cli/src/server/fullstack/mod.rs

Lines 10 to 34 in 1ec6819

static CLIENT_RUST_FLAGS: &str = "-C debuginfo=none -C strip=debuginfo";
// The `opt-level=2` increases build times, but can noticeably decrease time
// between saving changes and being able to interact with an app. The "overall"
// time difference (between having and not having the optimization) can be
// almost imperceptible (~1 s) but also can be very noticeable (~6 s) — depends
// on setup (hardware, OS, browser, idle load).
static SERVER_RUST_FLAGS: &str = "-C opt-level=2";
static DEBUG_RUST_FLAG: &str = "-C debug-assertions";
fn rust_flags(build: &ConfigOptsBuild, base_flags: &str) -> String {
let mut rust_flags = base_flags.to_string();
if !build.release {
rust_flags += " ";
rust_flags += DEBUG_RUST_FLAG;
};
rust_flags
}
pub fn client_rust_flags(build: &ConfigOptsBuild) -> String {
rust_flags(build, CLIENT_RUST_FLAGS)
}
pub fn server_rust_flags(build: &ConfigOptsBuild) -> String {
rust_flags(build, SERVER_RUST_FLAGS)
}

The Cargo Book states on build.rustflags:

There are four mutually exclusive sources of extra flags. They are checked in order, with the first one being used:

  1. CARGO_ENCODED_RUSTFLAGS environment variable.
  2. RUSTFLAGS environment variable.
  3. All matching target.<triple>.rustflags and target.<cfg>.rustflags config entries joined together.
  4. build.rustflags config value.

So this behavior is not entirely unsurprising.

I don't know of any obvious solution, but one (rather elaborate) approach would be to search the hierarchy for config.toml and read the files in Dioxus itself: https://doc.rust-lang.org/cargo/reference/config.html#hierarchical-structure.

from dioxus.

pablosichert avatar pablosichert commented on July 24, 2024

#2259 seems to be somewhat related.

from dioxus.

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