On Thu, Jan 20, 2011 at 7:57 PM, Nick Stokes <randomaccessiterator@xxxxxxxxx> wrote: > On Thu, Jan 20, 2011 at 3:01 PM, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: >> On 20 January 2011 19:57, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: >>> 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. >> >> It looks as though you can also define _XOPEN_SOURCE=700 (or greater) >> to set __USE_XOPEN2K8 >> >> Either way, you should use one of those standard feature test macros, >> not the __USE_XOPEN2K8 one which is an internal implementation >> details, see man feature_test_macros for more details. >> > > Thanks, these are great leads! > > But unfortunately this didn't work either. The reason is subtle (and > elusive!): On CentOS (where gcc is built) the GCC features.h header is > defining __USE_XOPEN2K, and not __USE_XOPEN2K8 conditioned on > _XOPEN_SOURCE (or _POSIX_C_SOURCE) being defined. But on the > front-end SUSE, the /usr/include/locale.h is expecting __USE_XOPEN2K8, > hence fails. > > - nick > I guess I can sweep under the rug for now by defining __USE_XOPEN2K8. Incidentally, I need to make this transparent for users. Is it possible to add such "custom" definitions to gcc at configure time (or is there some other way to accomplish this)? Thanks, - Nick
