glibc2.32 build error for powerpc64-unknown-linux-gnu

[Chris Packham]

Hi,

crosstool-ng was recently updated to add glibc-2.32. We're seeing the 
following error building for powerpc64

[ALL  ]      In file included from 
../sysdeps/powerpc/powerpc32/power4/multiarch/wordcopy-ppc32.c:26,
[ALL  ]                       from 
../sysdeps/powerpc/powerpc64/multiarch/wordcopy-ppc64.c:18:
[ALL  ]      ../string/wordcopy.c: In function '_wordcopy_fwd_aligned':
[ERROR]      ../string/wordcopy.c:98:26: error: 'a1' may be used 
uninitialized in this function [-Werror=maybe-uninitialized]
[ALL  ]         98 |       ((op_t *) dstp)[0] = a1;
[ALL  ]            |       ~~~~~~~~~~~~~~~~~~~^~~~

Looking at the code in question I think it's a spurious warning. There 
even appears to be an attempt to turn off the warning in 
sysdeps/generic/Makefile but the file is #included for powerpc so the 
flags applied.

Bug report with full logs 
https://github.com/crosstool-ng/crosstool-ng/issues/1380