[gcc/devel/rust/master] gccrs: Add testcase for #[rustc_const_stable]

[Thomas Schwinge via Gcc-cvs]

https://gcc.gnu.org/g:0a0549eaba10352ed82f9bf401ae69eedb662f0d

commit 0a0549eaba10352ed82f9bf401ae69eedb662f0d
Author: Arthur Cohen <arthur.co...@embecosm.com>
Date:   Wed Feb 7 09:27:11 2024 +0100

    gccrs: Add testcase for #[rustc_const_stable]
    
    To ensure we don't introduce regressions back to issue #2314
    
    gcc/testsuite/ChangeLog:
    
            * rust/compile/rustc_const_stable.rs: New test.

Diff:
---
 gcc/testsuite/rust/compile/rustc_const_stable.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/testsuite/rust/compile/rustc_const_stable.rs 
b/gcc/testsuite/rust/compile/rustc_const_stable.rs
new file mode 100644
index 000000000000..9208b1ab3b62
--- /dev/null
+++ b/gcc/testsuite/rust/compile/rustc_const_stable.rs
@@ -0,0 +1,2 @@
+#[rustc_const_stable(feature = "const_ascii_ctype_on_intrinsics", since = 
"1.47.0")]
+pub fn foo() {} // { dg-error "macro not found" "" { target *-*-* } .-1 }