This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: Warnings in string/stratcliff.c, wcsmbs/wcsatcliff.c with GCC 7 -O3
- From: Wainer dos Santos Moschetta <wainersm at linux dot vnet dot ibm dot com>
- To: libc-alpha at sourceware dot org
- Date: Wed, 22 Mar 2017 11:53:15 -0300
- Subject: Re: Warnings in string/stratcliff.c, wcsmbs/wcsatcliff.c with GCC 7 -O3
- Authentication-results: sourceware.org; auth=none
- References: <ddc73696-7ae8-a98f-1d51-18ed4f758b92@linux.vnet.ibm.com>
On 03/22/2017 11:29 AM, Stefan Liebler wrote:
> Hi,
>
> Compiling string/stratcliff.c with GCC 7 and -O3 leads to the following warning/errors on s390x / x86_64:
> ../test-skeleton.c: In function ‘legacy_test_function’:
> cc1: error: assuming signed overflow does not occur when assuming that (X - c) <= X is always true [-Werror=strict-overflow]
https://sourceware.org/ml/libc-alpha/2017-03/msg00422.html
Could you give a try with above patch in?
It updates the string tests to the support test driver. Above error occurs in the legacy test skeleton. Otherwise the support test-driver will need a fix too.