On 20 January 2011 19:28, Nick Stokes wrote: > > Great! This indeed revealed it. In /usr/include/locale.h (same > location, line 133, in both distros actually) there is #ifdef > __USE_GNU on CentOS version, which is #ifdef __USE_XOPEN2K8 in > SUSE's version. So, in fact if I define `__USE_XOPEN2K8' while > compiling on SUSE, it works. Hmm, go figure.. This can not be the > right way to do this. What am I missing? I don't know why they're different (on my glibc 2.12 system the uselocale definition is guarded by __USE_GNU, just like your CentOS system) but it looks like you've found the solution. Users are not supposed to use the __USE_XXX macros, instead you should define _GNU_SOURCE to enable __USE_GNU and _POSIX_C_SOURCE=200809L (or greater) to enable __USE_XOPEN2K8.
