From ea95627dce897a7ffa249190dc0206cbdb43eebb Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Sat, 27 Jul 2024 20:55:21 +0000
Subject: [PATCH] hoist rustc flag string array to global const

Signed-off-by: Jason Volk <jason@zemos.net>
---
 src/macros/rustc.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/macros/rustc.rs b/src/macros/rustc.rs
index a3bab26f..d286ed33 100644
--- a/src/macros/rustc.rs
+++ b/src/macros/rustc.rs
@@ -9,11 +9,13 @@ pub(super) fn flags_capture(args: TokenStream) -> TokenStream {
 	};
 
 	let flag = std::env::args().collect::<Vec<_>>();
+	let flag_len = flag.len();
 	let ret = quote! {
+		pub static RUSTC_FLAGS: [&str; #flag_len] = [#( #flag ),*];
+
 		#[conduit_core::ctor]
 		fn _set_rustc_flags() {
-			let flags = &[#( #flag ),*];
-			conduit_core::info::rustc::FLAGS.lock().expect("locked").insert(#crate_name, flags);
+			conduit_core::info::rustc::FLAGS.lock().expect("locked").insert(#crate_name, &RUSTC_FLAGS);
 		}
 
 		// static strings have to be yanked on module unload