Diomidis Spinellis <dds@xxxxxxx> writes: >> Perhaps cook this in 'next' and see if anybody screams? Let's do this. > I was programming in C before locale.h was introduced, so its > availability was something that worried me as well. I looked up > whether we could/should use a GNU autoconf macro to test for the > locale.h availability. According to autoconf's documentation "All > hosted environments that are still of interest for portable code > provide all of the headers specified in ISO C90 (as amended in 1995): > assert.h, [...] locale.h [...], and wctype.h. Most programs can safely > include these headers unconditionally." [1] Yeah, but there are folks on minor platforms where full POSIX compliance is iffy, so whatever autoconf's documentation says unfortunately does not weigh as much as we wish it does.