According to Ralf Wildenhues on 2/1/2010 11:44 AM: > * Ralf Wildenhues wrote on Sat, Jan 30, 2010 at 12:45:33AM CET: >> Current Cygwin fails the test with or without the patch below, but for >> another reason: >> >> +allowed-chars Zardos differ: char 168, line 2 >> >> I'm not sure whether it is a regression. I've tried to debug it; it >> looks like an issue in Cygwin sed or the shell. The config.status >> script in that test directory looks weird: the text which is to be >> substituted for @zardoz@ is mangled in a way that part of the last line >> of the string also appears on an earlier line. I fail to see any >> connection with newline encoding here, however. > > It's a locale issue. configure scripts default their environment to C > locale, but C doesn't have to mean ASCII. On my Cygwin, C means UTF-8. > I suppose though that's just because Cygwin changed recently. Setting > LC_ALL=C.ASCII makes the test pass.
I need to look into this further, when I can get some spare time. ANY test that assumes that bytes >= 128 can be used as valid characters is inherently non-portable. There's a difference between byte processing (which the C locale guarantees for all bytes) and character processing (which is only valid on characters, but the set of valid characters in the C locale is allowed to be implementation-dependent). > > Now, I'm not sure what that means for real-life configure scripts. > IOW, should _AS_SHELL_SANITIZE be fixed, or only this torture test? > Then, is C.ASCII even a portable setting for LC_ALL (and LANGUAGE)? C.ASCII is implementation-specific - cygwin has it, but it is not mandated by any standards. I don't think _AS_SHELL_SANITIZE is broken (if you are portably coding for the C locale, then you should NOT be passing 8-bit bytes through any text-based tools). But we DO need to add some warnings to the autoconf manual, and fix this particular test to either try alternate locales, or skip 8-bit bytes, in the presence of a multibyte C locale (since POSIX _does_ allow a multibyte C locale). -- Don't work too hard, make some time for fun as well! Eric Blake e...@byu.net
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