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bug#72842: Compile error due to lto warning on Arch Linux -Werror=maybe-
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From: |
Pádraig Brady |
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Subject: |
bug#72842: Compile error due to lto warning on Arch Linux -Werror=maybe-uninitialized |
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Date: |
Wed, 28 Aug 2024 12:37:15 +0100 |
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User-agent: |
Mozilla Thunderbird Beta |
On 27/08/2024 22:34, Paul Eggert wrote:
I'm not seeing that false alarm when building coreutils v9.5 on Ubuntu
24.04 LTS with "./configure --enable-gcc-warnings CC=gcc-14".
What GCC version are you using? If it's not GCC 14, try upgrading. I'm
using gcc-14 (Ubuntu 14-20240412-0ubuntu1) 14.0.1 20240412
(experimental) [master r14-9935-g67e1433a94f].
I think LTO is key here, as GCC has more context then to produce warnings.
With `-march=native -O3 -flto` on GCC 14.2.1 I see,
2 false warnings in gnulib (patch attached).
1 correct warning in coreutils (patch attached).
Marking this as done.
I'll apply the patches later today.
cheers,
Pádraig.
gnulib-lto.patch
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coreutils-xdectoint-lto.patch
Description: Text Data