First go at conditionals

.cargo/config.toml

@@ -1,3 +1,11 @@
-[target.'cfg(all(target_arch = "arm", target_os = "none"))']
 [build]
-target = "thumbv7em-none-eabihf"
+#target = "thumbv7em-none-eabihf"
+[target.xtensa-esp32s3-none-elf]
+runner = "espflash flash --monitor"
+
+rustflags = [
+  "-C", "link-arg=-Tlinkall.x",
+  "-C", "link-arg=-nostartfiles",
+  "-C", "link-arg=-Trom_functions.x",
+  "-C", "target-feature=-loop",
+]

build.rs

@@ -1,23 +1,39 @@
+use core::panic;
 use std::ffi::OsStr;
-use std::fs;
 use std::path::PathBuf;
+use std::{env, fs};
 
 fn main() {
+    let target = env::var("TARGET").unwrap(); // the right way of doing it.
+    println!("Target we received from the system is: {}", target);
+    //This whole match statement and the forcing of the target shouldn't be here.
+    let target = match target.as_str() {
+        "thumbv7em-none-eabihf" => "thumbv7em-none-eabihf",
+        "xtensa-esp32s3-none-elf" => "xtensa-esp32s3-none-elf",
+        _ => "thumbv7em-none-eabihf",
+    };
+    println!("Target we are using: {}", target);
+    env::set_var("TARGET", target);
+
     let xmpath = PathBuf::from("rss")
         .canonicalize()
         .expect("rss directory not found");
-
-    cc::Build::new()
-        .file("c_src/wrapper.c")
-        .include("c_src")
-        .flag("-mfloat-abi=hard")
-        .flag("-mfpu=fpv4-sp-d16")
-        .warnings_into_errors(true)
-        .extra_warnings(true)
-        .compile("log");
-
-    // Assuming 'lib' directory contains the compiled library for ARM architecture
-    let lib = xmpath.join("lib");
+    let lib = if target.eq("thumbv7em-none-eabihf") {
+        cc::Build::new()
+            .file("c_src/wrapper.c")
+            .include("c_src")
+            .flag("-mfloat-abi=hard")
+            .flag("-mfpu=fpv4-sp-d16")
+            .warnings_into_errors(true)
+            .extra_warnings(true)
+            .compile("log");
+        xmpath.join("lib/arm")
+    } else if target.eq("xtensa-esp32s3-none-elf") {
+        cc::Build::new().file("c_src/wrapper.c").include("c_src");
+        xmpath.join("lib/xtensa")
+    } else {
+        panic!("Target is not set or not supported.");
+    };
 
     println!("cargo:rustc-link-search={}", lib.display());
     println!("cargo:rustc-link-lib=static=acconeer_a121");
@@ -32,12 +48,23 @@ fn main() {
         panic!("headers not found");
     }
 
-    let mut bindings = bindgen::Builder::default()
-        .clang_arg("--target=arm-none-eabihf")
-        .clang_arg(format!("-I{}", headers.display()))
-        .layout_tests(false)
-        .generate_cstr(true)
-        .use_core();
+    let mut bindings = if target.eq("thumbv7em-none-eabihf") {
+        bindgen::Builder::default()
+            .clang_arg("--target=arm-none-eabihf")
+            .clang_arg(format!("-I{}", headers.display()))
+            .layout_tests(false)
+            .generate_cstr(true)
+            .use_core()
+    } else if target.eq("xtensa-esp32s3-none-elf") {
+        bindgen::Builder::default()
+            .clang_arg("--target=xtensa-esp32s3-none-elf")
+            .clang_arg(format!("-I{}", headers.display()))
+            .layout_tests(false)
+            .generate_cstr(true)
+            .use_core()
+    } else {
+        panic!("Target is not set or not supported.");
+    };
 
     for entry in fs::read_dir(&headers).unwrap() {
         let entry = entry.unwrap();