Revert "Disable JIT compiler on unsupported platforms (solana-labs#21215

)"

This reverts commit 4c66126.

ledger/src/builtins.rs

@@ -9,12 +9,6 @@ macro_rules! to_builtin {
 
 /// Builtin programs that are always available
 fn genesis_builtins(bpf_jit: bool) -> Vec<Builtin> {
-    // Currently JIT is not supported on the BPF VM:
-    // !x86_64: https://github.com/qmonnet/rbpf/issues/48
-    // Windows: https://github.com/solana-labs/rbpf/issues/217
-    #[cfg(any(not(target_arch = "x86_64"), target_family = "windows"))]
-    let bpf_jit = false;
-
     vec![
         to_builtin!(solana_bpf_loader_deprecated_program!()),
         if bpf_jit {

validator/src/bin/solana-test-validator.rs

@@ -393,6 +393,11 @@ fn main() {
         IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)),
         faucet_port,
     ));
+    // JIT not supported on the BPF VM in Windows currently: https://github.com/solana-labs/rbpf/issues/217
+    #[cfg(target_family = "windows")]
+    let bpf_jit = false;
+    #[cfg(not(target_family = "windows"))]
+    let bpf_jit = !matches.is_present("no_bpf_jit");
 
     let mut programs = vec![];
     if let Some(values) = matches.values_of("bpf_program") {
@@ -552,7 +557,7 @@ fn main() {
             faucet_addr,
             ..JsonRpcConfig::default()
         })
-        .bpf_jit(!matches.is_present("no_bpf_jit"))
+        .bpf_jit(bpf_jit)
         .rpc_port(rpc_port)
         .add_programs_with_path(&programs);