Miscellaneous feature-related build fixes. (bytecodealliance#12719)

Most found with cargo-all-features.

Signed-off-by: Piotr Sikora <code@piotrsikora.dev>

Author: PiotrSikora

crates/wasmtime/Cargo.toml

@@ -379,7 +379,7 @@ reexport-wasmparser = []
 
 # Enables instances of the traits defined in the wasm-wave crate, which
 # provides a human-readable text format for component values.
-wave = ["dep:wasm-wave", 'component-model']
+wave = ["dep:wasm-wave", "component-model", "std"]
 
 # For platforms that Wasmtime does not have support for Wasmtime will disable
 # the use of virtual memory by default, for example allocating linear memories
@@ -402,7 +402,13 @@ custom-sync-primitives = []
 # Off-by-default support to profile the Pulley interpreter. This has a
 # performance hit, even when not profiling, so it's disabled by default at
 # compile time.
-profile-pulley = ['anyhow', 'pulley', 'profiling', 'pulley-interpreter/profile']
+profile-pulley = [
+    "anyhow",
+    "profiling",
+    "pulley",
+    "pulley-interpreter/interp",
+    "pulley-interpreter/profile",
+]
 
 # Enables support for the Component Model Async ABI, along with `future`,
 # `stream`, and `error-context` types.

crates/wasmtime/build.rs

@@ -26,7 +26,9 @@ fn main() {
         && (supported_os || cfg!(feature = "custom-native-signals"))
         && has_host_compiler_backend;
     let has_virtual_memory = supported_os || cfg!(feature = "custom-virtual-memory");
-    let has_custom_sync = !cfg!(feature = "std") && cfg!(feature = "custom-sync-primitives");
+    let has_custom_sync = !cfg!(feature = "std")
+        && cfg!(feature = "custom-sync-primitives")
+        && cfg!(feature = "runtime");
 
     custom_cfg("has_native_signals", has_native_signals);
     custom_cfg("has_virtual_memory", has_virtual_memory);

crates/wasmtime/src/profiling_agent/pulley.rs

@@ -35,6 +35,7 @@
 use crate::ToWasmtimeResult as _;
 use crate::prelude::*;
 use crate::profiling_agent::ProfilingAgent;
+#[cfg(feature = "runtime")]
 use crate::vm::Interpreter;
 use pulley_interpreter::profile::{ExecutingPc, Recorder, Samples};
 use std::mem;
@@ -141,6 +142,7 @@ impl ProfilingAgent for PulleyAgent {
     /// Registers a new interpreter coming online. Interpreters, with
     /// `pulley-profile` enabled, store a shadow program counter updated on each
     /// instruction which we can read from a different thread.
+    #[cfg(feature = "runtime")]
     fn register_interpreter(&self, interpreter: &Interpreter) {
         let pc = interpreter.pulley().executing_pc();
         self.state

crates/wasmtime/src/runtime/vm/mmap_vec.rs

@@ -303,16 +303,17 @@ impl MmapVec {
                 crate::bail!("Cannot clone an externally-owned code memory.");
             }
             #[cfg(has_virtual_memory)]
+            #[allow(
+                unused_variables,
+                reason = "`mmap` and `len` only used with `std` feature"
+            )]
             MmapVec::Mmap { mmap, len } => {
+                #[cfg(feature = "std")]
                 if let Some(original_file) = mmap.original_file() {
                     let mmap = Mmap::from_file(original_file.clone())?;
-                    Ok(MmapVec::Mmap { mmap, len: *len })
-                } else {
-                    MmapVec::from_slice_with_alignment(
-                        &self[..],
-                        crate::runtime::vm::host_page_size(),
-                    )
+                    return Ok(MmapVec::Mmap { mmap, len: *len });
                 }
+                MmapVec::from_slice_with_alignment(&self[..], crate::runtime::vm::host_page_size())
             }
         }
     }

pulley/Cargo.toml

@@ -40,4 +40,4 @@ all-features = true
 
 [[example]]
 name = "profiler-html"
-required-features = ["profile"]
+required-features = ["disas", "interp", "profile"]

pulley/src/lib.rs

@@ -1392,7 +1392,7 @@ pub mod disas;
 pub mod encode;
 #[cfg(feature = "interp")]
 pub mod interp;
-#[cfg(feature = "profile")]
+#[cfg(all(feature = "profile", feature = "interp"))]
 pub mod profile;
 #[cfg(all(not(feature = "profile"), feature = "interp"))]
 mod profile_disabled;
@@ -1411,7 +1411,7 @@ pub use op::*;
 pub mod opcode;
 pub use opcode::*;
 
-#[cfg(any(feature = "encode", feature = "decode"))]
+#[cfg(feature = "decode")]
 pub(crate) unsafe fn unreachable_unchecked() -> ! {
     #[cfg(debug_assertions)]
     unreachable!();