feat: initial std support

Cargo.toml

@@ -12,7 +12,7 @@ categories = ["embedded", "no-std", "development-tools::testing"]
 default-target = "riscv32imac-unknown-none-elf"
 
 [dependencies]
-semihosting = { version = "0.1.7", features = ["args"] }
+semihosting = { version = "0.1.7", features = ["args"], optional = true }
 embedded-test-macros = { version = "0.6.0", path = "./macros" }
 serde = { version = "1.0.193", default-features = false, features = ["derive"] }
 serde-json-core = { version = "0.5.1" }
@@ -25,7 +25,13 @@ embassy-executor = { version = "0.7.0", optional = true, default-features = fals
 
 
 [features]
-default = ["panic-handler"]
+default = ["semihosting", "panic-handler"]
+
+# use semihosting (for embedded targets)
+semihosting = ["dep:semihosting"]
+
+# use std functionality
+std = []
 
 # defines a panic-handler which will invoke `semihosting::process::abort()` on panic
 panic-handler = []
@@ -38,10 +44,7 @@ log = ["dep:log"]
 
 # Enables async test and init functions using embassy-executor.
 # Note: You need to enable at least one executor feature on embassy unless you are using the `external-executor` feature
-embassy = [
-    "embedded-test-macros/embassy",
-    "dep:embassy-executor",
-]
+embassy = ["embedded-test-macros/embassy", "dep:embassy-executor"]
 
 # you will use your own executor by setting it via the `tasks` macro, e.g. `#[embedded_test::tests(executor = esp_hal::embassy::executor::thread::Executor::new())]`
 external-executor = ["embedded-test-macros/external-executor"]

build.rs

@@ -22,6 +22,7 @@ macro_rules! assert_unique_features {
 fn main() -> Result<(), Box<dyn Error>> {
     assert_unique_features!("log", "defmt");
     assert_unique_features!("ariel-os", "external-executor");
+    assert_unique_features!("std", "semihosting");
 
     let out = &PathBuf::from(env::var("OUT_DIR")?);
     let linker_script = fs::read_to_string("embedded-test.x")?;

examples/std/.cargo/config.toml

@@ -0,0 +1,8 @@
+[build]
+# The repository level `.cargo/config.toml` sets an embedded target, which we
+# want to override here. Unfortunately there is no `host target triple`, so
+# this is hard-coded to x86_64 Linux here. This needs changing on other
+# platforms.
+target = "x86_64-unknown-linux-gnu"
+[target."x86_64-unknown-linux-gnu"]
+runner = "embedded-test-std-runner"

examples/std/.gitignore

@@ -0,0 +1 @@
+/target