From: Masahiro Yamada <masahiroy@kernel.org>
To: Martin KaFai Lau <martin.lau@linux.dev>, bpf@vger.kernel.org
Cc: linux-arch@vger.kernel.org, Andrii Nakryiko <andrii@kernel.org>,
linux-kernel@vger.kernel.org,
Nathan Chancellor <nathan@kernel.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>,
Nick Desaulniers <ndesaulniers@google.com>,
llvm@lists.linux.dev
Subject: [PATCH 3/3] btf: require pahole 1.21+ for DEBUG_INFO_BTF with default DWARF version
Date: Wed, 11 Sep 2024 20:03:58 +0900 [thread overview]
Message-ID: <20240911110401.598586-3-masahiroy@kernel.org> (raw)
In-Reply-To: <20240911110401.598586-1-masahiroy@kernel.org>
As described in commit 42d9b379e3e1 ("lib/Kconfig.debug: Allow BTF +
DWARF5 with pahole 1.21+"), the combination of CONFIG_DEBUG_INFO_BTF
and CONFIG_DEBUG_INFO_DWARF5 requires pahole 1.21+.
GCC 11+ and Clang 14+ default to DWARF 5 when the -g flag is passed.
For the same reason, the combination of CONFIG_DEBUG_INFO_BTF and
CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is also likely to require
pahole 1.21+. (At least, it is uncertain whether the requirement is
pahole 1.16+ or 1.21+.)
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
lib/Kconfig.debug | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index eff408a88dfd..011a7abc68a8 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -380,7 +380,7 @@ config DEBUG_INFO_BTF
depends on !GCC_PLUGIN_RANDSTRUCT || COMPILE_TEST
depends on BPF_SYSCALL
depends on PAHOLE_VERSION >= 116
- depends on !DEBUG_INFO_DWARF5 || PAHOLE_VERSION >= 121
+ depends on DEBUG_INFO_DWARF4 || PAHOLE_VERSION >= 121
# pahole uses elfutils, which does not have support for Hexagon relocations
depends on !HEXAGON
help
--
2.43.0
next prev parent reply other threads:[~2024-09-11 11:04 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-11 11:03 [PATCH 1/3] btf: remove redundant CONFIG_BPF test in scripts/link-vmlinux.sh Masahiro Yamada
2024-09-11 11:03 ` [PATCH 2/3] btf: move pahole check in scripts/link-vmlinux.sh to lib/Kconfig.debug Masahiro Yamada
2024-09-11 17:25 ` Alan Maguire
2024-09-12 0:45 ` Masahiro Yamada
2024-09-11 21:07 ` Andrii Nakryiko
2024-09-11 21:08 ` Nathan Chancellor
2024-09-11 11:03 ` Masahiro Yamada [this message]
2024-09-11 21:08 ` [PATCH 3/3] btf: require pahole 1.21+ for DEBUG_INFO_BTF with default DWARF version Andrii Nakryiko
2024-09-11 21:10 ` Nathan Chancellor
2024-09-11 21:02 ` [PATCH 1/3] btf: remove redundant CONFIG_BPF test in scripts/link-vmlinux.sh Nathan Chancellor
2024-09-11 21:05 ` Andrii Nakryiko
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