[gcc/devel/rust/master] gccrs: enable -Winfinite-recursion warnings by default

[gcc/devel/rust/master] gccrs: enable -Winfinite-recursion warnings by default

[Thomas Schwinge]

https://gcc.gnu.org/g:8f6680458524877c7803eb9821ccf5e83ecfd080

commit 8f6680458524877c7803eb9821ccf5e83ecfd080
Author: Philip Herron <herron.philip@googlemail.com>
Date:   Thu Apr 20 12:06:21 2023 +0100

    gccrs: enable -Winfinite-recursion warnings by default
    
    gcc/rust/ChangeLog:
    
            * lang.opt: add lang option flag
            * rust-lang.cc (grs_langhook_init_options_struct): enable by default
    
    Signed-off-by: Philip Herron <herron.philip@googlemail.com>

Diff:
---
 gcc/rust/lang.opt     | 4 ++++
 gcc/rust/rust-lang.cc | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/gcc/rust/lang.opt b/gcc/rust/lang.opt
index 753cea1fbc4..e05dd72870a 100644
--- a/gcc/rust/lang.opt
+++ b/gcc/rust/lang.opt
@@ -54,6 +54,10 @@ Wunused-result
 Rust Var(warn_unused_result) Warning
 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value.
 
+Winfinite-recursion
+Rust Var(warn_infinite_recursion) Warning
+Warn for infinitely recursive calls.
+
 frust-crate=
 Rust Joined RejectNegative
 -frust-crate=<name>             Set the crate name for the compilation
diff --git a/gcc/rust/rust-lang.cc b/gcc/rust/rust-lang.cc
index f3532298aec..1f04701f68b 100644
--- a/gcc/rust/rust-lang.cc
+++ b/gcc/rust/rust-lang.cc
@@ -162,6 +162,8 @@ grs_langhook_init_options_struct (struct gcc_options *opts)
   opts->x_warn_unused_const_variable = 1;
   /* And finally unused result for #[must_use] */
   opts->x_warn_unused_result = 1;
+  /* lets warn for infinite recursion*/
+  opts->x_warn_infinite_recursion = 1;
 
   // nothing yet - used by frontends to change specific options for the language
   Rust::Session::get_instance ().init_options ();