cranelift-codegen: Remove all default architecture support

cranelift/Cargo.toml

@@ -44,7 +44,7 @@ file-per-thread-logger = "0.1.2"
 indicatif = "0.11.0"
 
 [features]
-default = ["disas", "wasm"]
+default = ["disas", "wasm", "cranelift-codegen/all-arch"]
 disas = ["capstone"]
 wasm = ["wabt", "cranelift-wasm"]
 basic-blocks = ["cranelift-codegen/basic-blocks", "cranelift-frontend/basic-blocks", "cranelift-wasm/basic-blocks"]

cranelift/codegen/Cargo.toml

@@ -30,7 +30,7 @@ serde = { version = "1.0.94", features = ["derive"], optional = true }
 cranelift-codegen-meta = { path = "meta", version = "0.40.0", default-features = false }
 
 [features]
-default = ["std", "x86", "arm32", "arm64", "riscv"]
+default = ["std"]
 
 # The "std" feature enables use of libstd. The "core" feature enables use
 # of some minimal std-like replacement libraries. At least one of these two
@@ -54,11 +54,20 @@ core = [
 testing_hooks = []
 
 # ISA targets for which we should build.
+# If no ISA targets are explicitly enabled, the ISA target for the host machine is enabled.
 x86 = []
 arm32 = []
 arm64 = []
 riscv = []
 
+# Option to enable all architectures.
+all-arch = [
+    "x86",
+    "arm32",
+    "arm64",
+    "riscv"
+]
+
 # For dependent crates that want to serialize some parts of cranelift
 enable-serde = ["serde"]