http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769
Bug #: 53769 Summary: [C11]: Macros __STDC_NO_THREADS__ / __STDC_NO_ATOMIC__ missing. Classification: Unclassified Product: gcc Version: 4.7.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassig...@gcc.gnu.org ReportedBy: patrick.peliss...@gmail.com When building a C program with -std=c11, GCC doesn't define __STDC_NO_THREADS__ & __STDC_NO_ATOMIC__ whereas it doesn't support theses features (yet) and still defines __STDC_VERSION__ to 201112L.