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From: Martin Liska <marxin@gcc.gnu.org>
To: gcc-cvs@gcc.gnu.org
Subject: [gcc(refs/users/marxin/heads/PR107298-document-sanitizer-and-warnings)] docs: document sanitizers can trigger warnings
Date: Wed, 26 Oct 2022 11:08:47 +0000 (GMT)	[thread overview]
Message-ID: <20221026110847.33E803857008@sourceware.org> (raw)

https://gcc.gnu.org/g:844a59731f5f483495f4bcf10d91c3f193956508

commit 844a59731f5f483495f4bcf10d91c3f193956508
Author: Martin Liska <mliska@suse.cz>
Date:   Wed Oct 26 13:07:57 2022 +0200

    docs: document sanitizers can trigger warnings
    
            PR sanitizer/107298
    
    gcc/ChangeLog:
    
            * doc/invoke.texi: Document sanitizers can trigger warnings.

Diff:
---
 gcc/doc/invoke.texi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 64f77e8367a..1ffbba16a72 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -16460,6 +16460,10 @@ by this option.
 
 @end table
 
+Note the enabled sanitizer options tend to increase a false-positive rate
+of selected warnings, most notably @option{-Wmaybe-uninitialized}.
+And thus we recommend to disable @option{-Werror}.
+
 While @option{-ftrapv} causes traps for signed overflows to be emitted,
 @option{-fsanitize=undefined} gives a diagnostic message.
 This currently works only for the C family of languages.

                 reply	other threads:[~2022-10-26 11:08 UTC|newest]

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