> http://meyering.net/grep/grep-2.14.51-7a35.tar.xz
That snapshot fails "make check" on Ubuntu 13.10 x86-64. However, when I generate a tarball from the same git source, "make check" works for me. I think I tracked this down to a discrepancy in the tools used to build this snapshot. But it's getting late so I hope someone else can check this. The snapshot fails because the three tests multibyte-white-space, pcre-utf8, surrogate-pair all fail. And they fail because "printf '\x40'" prints "\x40" rather than "@". And this happens because the tests are run with /bin/sh, not /bin/bash; on Ubuntu /bin/sh is Dash and Dash mishandles printf with '\x...'. And this happens because './configure' decides to make SHELL /bin/sh rather than /bin/bash. And I think *this* happens because 'configure' was built with Autoconf 2.69.112-f181 rather than Autoconf 2.69 (this is the Autoconf 2.69 shipped with Fedora 19). The respective 'configure' scripts are pretty hairy, though, and I can't easily see why the meyering.net snapshot went awry.
