linux-kernel - linux-next: manual merge of the rust tree with the kbuild tree

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Date:   Fri, 15 Oct 2021 18:24:04 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Masahiro Yamada <masahiroy@...nel.org>
Cc:     Adam Bratschi-Kaye <ark.email@...il.com>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Ayaan Zaidi <zaidi.ayaan@...il.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Boris-Chengbiao Zhou <bobo1239@....de>,
        Douglas Su <d0u9.su@...look.com>, Finn Behrens <me@...enk.de>,
        Fox Chen <foxhlchen@...il.com>, Gary Guo <gary@...yguo.net>,
        Geoffrey Thomas <geofft@...reload.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Miguel Ojeda <ojeda@...nel.org>,
        Sumera Priyadarsini <sylphrenadin@...il.com>,
        Sven Van Asbroeck <thesven73@...il.com>,
        Wedson Almeida Filho <wedsonaf@...gle.com>,
        Yuki Okushi <jtitor@...6.org>
Subject: linux-next: manual merge of the rust tree with the kbuild tree

Hi all,

Today's linux-next merge of the rust tree got a conflict in:

  Makefile

between commit:

  09708df61f2b ("kbuild: split DEBUG_CFLAGS out to scripts/Makefile.debug")

from the kbuild tree and commit:

  dc08d49444e9 ("Kbuild: add Rust support")

from the rust tree.

I fixed it up (I used the Makefile conflicting part from the former and
applied the patch below) and can carry the fix as necessary. This is
now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your
tree is submitted for merging.  You may also want to consider
cooperating with the maintainer of the conflicting tree to minimise any
particularly complex conflicts.

Miguel,  it might be worth do a back merge of v5.14 (or maybe even
v5.15-rc1) to fix up the old conflicts ... If you do that, though,
please don't use github's GUI to do it, do it in your own git tree,
include a good commit message in the merge commit (saying why you did
the merge), and push it up to git hub.

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Fri, 15 Oct 2021 18:16:09 +1100
Subject: [PATCH] Kbuild: fix for "kbuild: split DEBUG_CFLAGS out to scripts/Makefile.debug"

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 scripts/Makefile.debug | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/scripts/Makefile.debug b/scripts/Makefile.debug
index 9f39b0130551..ad9308a08240 100644
--- a/scripts/Makefile.debug
+++ b/scripts/Makefile.debug
@@ -1,4 +1,5 @@
 DEBUG_CFLAGS	:=
+DEBUG_RUSTFLAGS :=
 
 ifdef CONFIG_DEBUG_INFO_SPLIT
 DEBUG_CFLAGS	+= -gsplit-dwarf
@@ -8,6 +9,11 @@ endif
 
 ifndef CONFIG_AS_IS_LLVM
 KBUILD_AFLAGS	+= -Wa,-gdwarf-2
+ifdef CONFIG_DEBUG_INFO_REDUCED
+DEBUG_RUSTFLAGS += -Cdebuginfo=1
+else
+DEBUG_RUSTFLAGS += -Cdebuginfo=2
+endif
 endif
 
 ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
@@ -31,3 +37,6 @@ endif
 
 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
 export DEBUG_CFLAGS
+
+KBUILD_RUSTFLAGS += $(DEBUG_RUSTFLAGS)
+export DEBUG_RUSTFLAGS
-- 
2.33.0

-- 
Cheers,
Stephen Rothwell

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