[bug-diffutils] Problem building from bootstrapped git checkout

[Stefano Lattarini]

Due to this error:

make[2]: Entering directory '/storage/home/stefano/bleeding/src/diffutils/lib'
  CC       allocator.o
  CC       areadlink.o
  CC       binary-io.o
  CC       bitrotate.o
  CC       c-ctype.o
  CC       c-stack.o
  CC       c-strcasecmp.o
  CC       c-strncasecmp.o
  CC       careadlinkat.o
  CC       dirname.o
  CC       basename.o
  CC       dirname-lgpl.o
c-stack.c: In function 'segv_handler':
c-stack.c:163:12: error: function might be candidate for attribute 'pure' if \
   it is known to return normally [-Werror=suggest-attribute=pure]
cc1: all warnings being treated as errors
Makefile:1531: recipe for target 'c-stack.o' failed
make[2]: *** [c-stack.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory '/storage/home/stefano/bleeding/src/diffutils/lib'
Makefile:1684: recipe for target 'check' failed

I'm using GCC 4.7.2 on a Debian system (unstable).  Let me know if you need
more information.

Of course, the issue disappears if I run configure with the
'--disable-gcc-warnings' option, so this isn't s show-stopper.

Regards,
  Stefano