[PATCH] kbuild: rust: use `-Zdwarf-version` to support DWARFv5

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Rust 1.64.0 introduced (unstable) support for the `-Zdwarf-version`
flag, which allows to select DWARFv5, thus use it.

Link: https://github.com/rust-lang/rust/issues/103057
Link: https://github.com/rust-lang/rust/pull/98350
Signed-off-by: Miguel Ojeda <ojeda@xxxxxxxxxx>
---
 scripts/Makefile.debug | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/Makefile.debug b/scripts/Makefile.debug
index 059ff38fe0cb..693452bc826a 100644
--- a/scripts/Makefile.debug
+++ b/scripts/Makefile.debug
@@ -17,6 +17,12 @@ endif
 DEBUG_CFLAGS	+= $(debug-flags-y)
 KBUILD_AFLAGS	+= $(debug-flags-y)
 
+ifdef CONFIG_DEBUG_INFO_DWARF4
+DEBUG_RUSTFLAGS	+= -Zdwarf-version=4
+else ifdef CONFIG_DEBUG_INFO_DWARF5
+DEBUG_RUSTFLAGS	+= -Zdwarf-version=5
+endif
+
 ifdef CONFIG_DEBUG_INFO_REDUCED
 DEBUG_CFLAGS	+= -fno-var-tracking
 DEBUG_RUSTFLAGS	+= -Cdebuginfo=1

base-commit: 841c35169323cd833294798e58b9bf63fa4fa1de
-- 
2.43.0





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