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gcc 4.7 build failures from -Werror


I first tried to do a build of glibc for tilepro with an old gcc 4.7.3 compiler
that I had prebuilt and lying around.  However, this is no longer able to
build glibc; it generates maybe-uninitialized warnings in stdio-common/vfwscanf.c and nis/nis_table.c. I tried 4.8.5 and it worked fine. I'm not sure if this is an
argument to upgrade to 4.8 as a minimum, or if we should spend any effort
trying to fix the issues with gcc 4.7.

In file included from vfwscanf.c:2:0:
vfscanf.c: In function â_IO_vfwscanfâ:
vfscanf.c:1543:21: error: âwcdigits_extended[9]â may be used uninitialized in this function [-Werror=maybe-uninitialized]
vfscanf.c:1543:21: error: âwcdigits_extended[8]â may be used uninitialized in this function [-Werror=maybe-uninitialized]
vfscanf.c:1543:21: error: âwcdigits_extended[7]â may be used uninitialized in this function [-Werror=maybe-uninitialized]
vfscanf.c:1543:21: error: âwcdigits_extended[6]â may be used uninitialized in this function [-Werror=maybe-uninitialized]
vfscanf.c:1543:21: error: âwcdigits_extended[5]â may be used uninitialized in this function [-Werror=maybe-uninitialized]
vfscanf.c:1543:21: error: âwcdigits_extended[4]â may be used uninitialized in this function [-Werror=maybe-uninitialized]

nis_table.c: In function ânis_listâ:
nis_table.c:178:6: error: âtableptrâ may be used uninitialized in this function [-Werror=maybe-uninitialized]
nis_table.c:214:9: note: âtableptrâ was declared here

--
Chris Metcalf, EZChip Semiconductor
http://www.ezchip.com


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