From dbef1811c8865562127a6e04c3364f35ceaaa94d Mon Sep 17 00:00:00 2001
From: Miguel Ojeda <ojeda@kernel.org>
Date: Sat, 17 Feb 2024 01:26:22 +0100
Subject: [PATCH] kbuild: rust: use `-Zdebuginfo-compression`
Rust 1.74.0 introduced (unstable) support for the
`-Zdebuginfo-compression` flag, thus use it.
Note that the releases built by the Rust project (i.e. the ones provided
by rustup) do not enable support for zstd in their bundled LLVM (yet,
at least), thus the Rust compiler will warn, but the build will proceed:
warning: unknown debuginfo compression algorithm zstd - will fall
back to uncompressed debuginfo
Link: https://github.com/rust-lang/rust/issues/120953
Link: https://github.com/rust-lang/rust/pull/115358
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20240217002622.57322-1-ojeda@kernel.org
[ Added note about zstd support in Rust-provided binaries. ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
scripts/Makefile.debug | 2 ++
1 file changed, 2 insertions(+)
diff --git a/scripts/Makefile.debug b/scripts/Makefile.debug
index 693452bc826aa..107db997ce389 100644
--- a/scripts/Makefile.debug
+++ b/scripts/Makefile.debug
@@ -35,10 +35,12 @@ endif
ifdef CONFIG_DEBUG_INFO_COMPRESSED_ZLIB
DEBUG_CFLAGS += -gz=zlib
+DEBUG_RUSTFLAGS += -Zdebuginfo-compression=zlib
KBUILD_AFLAGS += -gz=zlib
KBUILD_LDFLAGS += --compress-debug-sections=zlib
else ifdef CONFIG_DEBUG_INFO_COMPRESSED_ZSTD
DEBUG_CFLAGS += -gz=zstd
+DEBUG_RUSTFLAGS += -Zdebuginfo-compression=zstd
KBUILD_AFLAGS += -gz=zstd
KBUILD_LDFLAGS += --compress-debug-sections=zstd
endif
--
GitLab