[1.7] wcwidth failing configure tests
Eric Blake
ebb9@byu.net
Tue May 12 16:02:00 GMT 2009
I noticed this failure in various configure scripts (findutils, coreutils, ...):
checking whether wcwidth works reasonably in UTF-8 locales... no
I've reduced it to a STC:
#include <locale.h>
#include <wchar.h>
int main ()
{
int i = 0;
if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL)
{
if (wcwidth (0x0301) > 0)
i |= 1;
if (wcwidth (0x200B) > 0)
i |= 2;
}
return i;
}
The return value should be 0 but is coming back as 3; 0x0301 is a combining
mark which should occupy no space on its own, and 0x200b is a 0-width space,
according to Unicode 5.1 (and earlier, to some extent). And that probably
means that other places within wcwidth() are broken.
--
Eric Blake
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