Remove useless RUSTFLAGS changes

README.md

@@ -30,7 +30,7 @@ See [passthrough arguments](#passthrough-arguments) for more details.
 
 It is also possible to pass any other `cargo` command (e.g. `doc`, `check`),
 and all its arguments will be passed through directly to `cargo` unmodified,
-with the proper `RUSTFLAGS` and `--target` set for the 3DS target.
+with the proper `--target armv6k-nintendo-3ds` set.
 
 ### Basic Examples
 

src/command.rs

@@ -4,7 +4,7 @@ use std::io::Read;
 use cargo_metadata::Message;
 use clap::{Args, Parser, Subcommand};
 
-use crate::{CTRConfig, build_3dsx, build_smdh, get_metadata, link};
+use crate::{build_3dsx, build_smdh, get_metadata, link, CTRConfig};
 
 #[derive(Parser, Debug)]
 #[command(name = "cargo", bin_name = "cargo")]
@@ -46,7 +46,7 @@ pub enum CargoCmd {
     // NOTE: it seems docstring + name for external subcommands are not rendered
     // in help, but we might as well set them here in case a future version of clap
     // does include them in help text.
-    /// Run any other `cargo` command with RUSTFLAGS set for the 3DS.
+    /// Run any other `cargo` command with custom building tailored for the 3DS.
     #[command(external_subcommand, name = "COMMAND")]
     Passthrough(Vec<String>),
 }
@@ -129,7 +129,7 @@ pub struct New {
 }
 
 impl CargoCmd {
-    /// Whether or not this command should compile any code, and thus needs import the custom environment configuration (e.g. RUSTFLAGS, target, std).
+    /// Whether or not this command should compile any code, and thus needs import the custom environment configuration (e.g. target spec).
     pub fn should_compile(&self) -> bool {
         matches!(
             self,

src/lib.rs

@@ -61,11 +61,6 @@ pub fn run_cargo(cmd: &CargoCmd, message_format: Option<String>) -> (ExitStatus,
 /// Create a cargo command used for building based on the context.
 /// If there is no pre-built std detected in the sysroot, `build-std` is used.
 pub fn make_cargo_build_command(cmd: &CargoCmd, message_format: &Option<String>) -> Command {
-    let rust_flags = env::var("RUSTFLAGS").unwrap_or_default()
-        + &format!(
-            " -L{}/libctru/lib -lctru",
-            env::var("DEVKITPRO").expect("DEVKITPRO is not defined as an environment variable")
-        );
     let cargo = env::var("CARGO").unwrap_or_else(|_| "cargo".to_string());
     let sysroot = find_sysroot();
     let mut command = Command::new(cargo);
@@ -78,7 +73,6 @@ pub fn make_cargo_build_command(cmd: &CargoCmd, message_format: &Option<String>)
     };
 
     command
-        .env("RUSTFLAGS", rust_flags)
         .arg(cmd_str)
         .arg("--target")
         .arg("armv6k-nintendo-3ds")