Re: Failures building glibc with mainline GCC

[Joseph Myers <joseph@codesourcery.com>]

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On Tue, 3 Aug 2021, Martin Sebor via Gcc wrote:

> Yes, we know about that one.  What I'm asking for is the translation
> units with the other warnings you showed with the latest GCC (including
> the threader patches) on the other targets (including i686 and power).
> I don't have an easy way to create them using my setup.

I've attached (all gzipped) hurdselect.i (i686-gnu, -O2 -Wall -Werror 
-Wno-parentheses):

hurdselect.c: In function '_hurd_select':
hurdselect.c:555:7: error: 'ss' may be used uninitialized in this function [-Werror=maybe-uninitialized]
hurdselect.c:70:25: note: 'ss' was declared here

and t.61.i (powerpc-linux-gnu, -O2 -Wall -Werror):

In file included from t.61.c:437:
In function 'from_t_61_single',
    inlined from 'gconv' at ../iconv/skeleton.c:568:15:
../iconv/loop.c:440:22: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
In file included from t.61.c:437:
../iconv/loop.c: In function 'gconv':
../iconv/loop.c:382:17: note: at offset 2 into destination object 'bytebuf' of size 2

and dl-tls.i (powerpc64-linux-gnu, -O2 -finline-limit=2000 -Wall -Werror; 
the -finline-limit=2000 option is necessary for the error and comes from 
sysdeps/powerpc/powerpc64/Makefile):

In file included from ../sysdeps/powerpc/dl-tls.c:20:
In function '_dl_allocate_tls_init',
    inlined from '_dl_allocate_tls' at ../elf/dl-tls.c:621:10:
../elf/dl-tls.c:529:10: error: array subscript -1 is outside array bounds of 'void[9223372036854775807]' [-Werror=array-bounds]
../elf/dl-tls.c:544:40: error: array subscript -1 is outside array bounds of 'void[9223372036854775807]' [-Werror=array-bounds]

-- 
Joseph S. Myers
joseph@codesourcery.com

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