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Re: [platform-testers] texinfo-6.6.90 pretest
From: |
Bruno Haible |
Subject: |
Re: [platform-testers] texinfo-6.6.90 pretest |
Date: |
Mon, 19 Aug 2019 22:35:45 +0200 |
User-agent: |
KMail/5.1.3 (Linux/4.4.0-157-generic; KDE/5.18.0; x86_64; ; ) |
Eli Zaretskii wrote:
> One other issue is that GCC 8 flags many uses of strncat in
> install-info.c as unsafe:
>
> install-info.c: In function 'split_entry':
> install-info.c:1624:17: warning: 'strncat' specified bound 2 equals
> source length [-Wstringop-overflow=]
> strncat (*description, " ", 2);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
The warnings are clearly pointless, because the amount of memory
allocated for *description is unknown to the compiler.
Which GCC options did you specify?
The GCC documentation [1] explains that -Wstringop-overflow=3 and
-Wstringop-overflow=4 "may result in warnings for safe code".
Bruno
[1] https://gcc.gnu.org/onlinedocs/gcc-8.3.0/gcc/Warning-Options.html