1 files changed, 70 insertions, 0 deletions
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..9272c07
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,70 @@
+fn main() {
+    linker_be_nice();
+    // make sure linkall.x is the last linker script (otherwise might cause problems with flip-link)
+    println!("cargo:rustc-link-arg=-Tlinkall.x");
+}
+
+fn linker_be_nice() {
+    let args: Vec<String> = std::env::args().collect();
+    if args.len() > 1 {
+        let kind = &args[1];
+        let what = &args[2];
+
+        match kind.as_str() {
+            "undefined-symbol" => match what.as_str() {
+                what if what.starts_with("_defmt_") => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 `defmt` not found - make sure `defmt.x` is added as a linker script and you have included `use defmt_rtt as _;`"
+                    );
+                    eprintln!();
+                }
+                "_stack_start" => {
+                    eprintln!();
+                    eprintln!("💡 Is the linker script `linkall.x` missing?");
+                    eprintln!();
+                }
+                what if what.starts_with("esp_rtos_") => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 `esp-radio` has no scheduler enabled. Make sure you have initialized `esp-rtos` or provided an external scheduler."
+                    );
+                    eprintln!();
+                }
+                "embedded_test_linker_file_not_added_to_rustflags" => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 `embedded-test` not found - make sure `embedded-test.x` is added as a linker script for tests"
+                    );
+                    eprintln!();
+                }
+                "free"
+                | "malloc"
+                | "calloc"
+                | "get_free_internal_heap_size"
+                | "malloc_internal"
+                | "realloc_internal"
+                | "calloc_internal"
+                | "free_internal" => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 Did you forget the `esp-alloc` dependency or didn't enable the `compat` feature on it?"
+                    );
+                    eprintln!();
+                }
+                _ => (),
+            },
+            // we don't have anything helpful for "missing-lib" yet
+            _ => {
+                std::process::exit(1);
+            }
+        }
+
+        std::process::exit(0);
+    }
+
+    println!(
+        "cargo:rustc-link-arg=--error-handling-script={}",
+        std::env::current_exe().unwrap().display()
+    );
+}