test: Support running unit tests on wasi

.cargo/config.toml.cross-wasm32p1

@@ -0,0 +1,2 @@
+[target.wasm32-wasip1]
+runner = "wasmtime --dir . --dir src --dir /"

.github/workflows/ci.yml

@@ -229,6 +229,9 @@ jobs:
           targets: wasm32-wasip1
       - uses: Swatinem/rust-cache@v2
       - run: cargo build --target wasm32-wasip1
+      # -p libwild prevents integration tests from running. they depend on
+      # spawning processes, which isn't supported on wasi.
+      - run: cargo test --profile ci -p libwild
 
   spelling:
     name: Spell Check with Typos

libwild/src/args/elf.rs

@@ -2098,6 +2098,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(target_os = "wasi", ignore = "wasi doesn't have a temp dir")]
     fn test_parse_file_only_options() {
         // Create a temporary file containing the same options (one per line) as INPUT1
         let file = NamedTempFile::new().expect("Could not create temp file");
@@ -2111,6 +2112,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(target_os = "wasi", ignore = "wasi doesn't have a temp dir")]
     fn test_parse_mixed_file_and_inline_options() {
         // Create a temporary file containing some options
         let file = NamedTempFile::new().expect("Could not create temp file");
@@ -2130,6 +2132,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(target_os = "wasi", ignore = "wasi doesn't have a temp dir")]
     fn test_parse_overlapping_file_and_inline_options() {
         // Create a set of file options that has a duplicate of an inline option
         let mut file_options = FILE_OPTIONS.to_vec();
@@ -2152,6 +2155,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(target_os = "wasi", ignore = "wasi doesn't have a temp dir")]
     fn test_parse_recursive_file_option() {
         // Create a temporary file containing a @file option
         let file1 = NamedTempFile::new().expect("Could not create temp file");

libwild/src/layout.rs

@@ -4902,7 +4902,10 @@ fn test_no_disallowed_overlaps() {
         output_sections.output_order(crate::output_kind::OutputKind::StaticExecutable(
             crate::args::RelocationModel::NonRelocatable,
         ));
-    let args = crate::args::elf::ElfArgs::default();
+    let mut args = crate::args::elf::ElfArgs::default();
+    if args.arch == crate::arch::Architecture::Unsupported {
+        args.arch = crate::arch::Architecture::X86_64;
+    }
     let section_part_sizes = output_sections.new_part_map::<u64>().map(|_, _| 7);
 
     let section_part_layouts = layout_section_parts::<Elf>(

wild/Cargo.toml

@@ -42,9 +42,11 @@ serde-keyvalue = { workspace =  true }
 strum = { workspace = true }
 tempfile = { workspace = true }
 toml = { workspace = true }
-wait-timeout = { workspace = true }
 which = { workspace = true }
 
+[target.'cfg(not(target_os = "wasi"))'.dev-dependencies]
+wait-timeout = { workspace = true }
+
 [features]
 default = ["fork"]