From: Nathan Chancellor <nathan@kernel.org>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH bpf-next 5/5] lib/Kconfig.debug: Allow BTF + DWARF5 with pahole 1.21+
Date: Tue, 1 Feb 2022 13:56:24 -0700 [thread overview]
Message-ID: <20220201205624.652313-6-nathan@kernel.org> (raw)
In-Reply-To: <20220201205624.652313-1-nathan@kernel.org>
Commit 98cd6f521f10 ("Kconfig: allow explicit opt in to DWARF v5")
prevented CONFIG_DEBUG_INFO_DWARF5 from being selected when
CONFIG_DEBUG_INFO_BTF is enabled because pahole had issues with clang's
DWARF5 info. This was resolved by [1], which is in pahole v1.21.
Allow DEBUG_INFO_DWARF5 to be selected with DEBUG_INFO_BTF when using
pahole v1.21 or newer.
[1]: https://git.kernel.org/pub/scm/devel/pahole/pahole.git/commit/?id=7d8e829f636f47aba2e1b6eda57e74d8e31f733c
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
lib/Kconfig.debug | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index bd487d480902..1555da672275 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -296,7 +296,7 @@ config DEBUG_INFO_DWARF4
config DEBUG_INFO_DWARF5
bool "Generate DWARF Version 5 debuginfo"
depends on !CC_IS_CLANG || (CC_IS_CLANG && (AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502)))
- depends on !DEBUG_INFO_BTF
+ depends on !DEBUG_INFO_BTF || PAHOLE_VERSION >= 121
help
Generate DWARF v5 debug info. Requires binutils 2.35.2, gcc 5.0+ (gcc
5.0+ accepts the -gdwarf-5 flag but only had partial support for some
--
2.35.1
next prev parent reply other threads:[~2022-02-01 20:57 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-01 20:56 [PATCH bpf-next 0/5] Allow CONFIG_DEBUG_INFO_DWARF5=y + CONFIG_DEBUG_INFO_BTF=y Nathan Chancellor
2022-02-01 20:56 ` [PATCH bpf-next 1/5] MAINTAINERS: Add scripts/pahole-flags.sh to BPF section Nathan Chancellor
2022-02-01 20:56 ` [PATCH bpf-next 2/5] kbuild: Add CONFIG_PAHOLE_VERSION Nathan Chancellor
2022-02-01 20:56 ` [PATCH bpf-next 3/5] scripts/pahole-flags.sh: Use pahole-version.sh Nathan Chancellor
2022-02-01 20:56 ` [PATCH bpf-next 4/5] lib/Kconfig.debug: Use CONFIG_PAHOLE_VERSION Nathan Chancellor
2022-02-01 20:56 ` Nathan Chancellor [this message]
2022-02-02 7:05 ` [PATCH bpf-next 0/5] Allow CONFIG_DEBUG_INFO_DWARF5=y + CONFIG_DEBUG_INFO_BTF=y Andrii Nakryiko
2022-02-02 10:25 ` Daniel Borkmann
2022-02-02 10:30 ` patchwork-bot+netdevbpf
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