Improve the default of FIRMWARE_DEVEL again, fix brew install gcc command

doc/installing-from-source.md

@@ -18,7 +18,7 @@ First, install dependencies:
 
 - [Rust](https://www.rust-lang.org/tools/install)
 - [Node.js/npm](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm)
-- C compiler tools (`apt install build-essential` or `brew install gcc`)
+- C compiler tools (`apt install build-essential` on Linux, `xcode-select --install` on Mac)
 
 Then you can build everything with:
 

installer/build.rs

@@ -4,7 +4,14 @@ use std::process::exit;
 fn main() {
     println!("cargo::rerun-if-env-changed=NO_FIRMWARE_BIN");
     println!("cargo::rerun-if-env-changed=FIRMWARE_PROFILE");
-    let profile = std::env::var("FIRMWARE_PROFILE").unwrap_or_else(|_| "firmware".to_string());
+    let profile = std::env::var("FIRMWARE_PROFILE").unwrap_or_else(|_| {
+        // Default to firmware-devel for debug builds, firmware for release builds
+        if std::env::var("PROFILE").as_deref() == Ok("release") {
+            "firmware".to_string()
+        } else {
+            "firmware-devel".to_string()
+        }
+    });
     let include_dir = Path::new(env!("CARGO_MANIFEST_DIR"))
         .join("../target/armv7-unknown-linux-musleabihf")
         .join(&profile);

scripts/install-dev.sh

@@ -11,4 +11,4 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
 
 cd "$PROJECT_DIR"
-FIRMWARE_PROFILE=firmware-devel cargo run -p installer --bin installer -- "$@"
+cargo run -p installer --bin installer -- "$@"