Hello, the experimental part of the GCC C++ compiler provides the <atomic> and <stdatomic.h> header files and implementation which may be part of a future C++ and C standard. As far as I understand the <stdatomic.h> is provided for C programs? If I include <stdatomic.h> in a C source file and try to compile it with the GCC C compiler I get this: fatal error: stdatomic.h: No such file or directory. Do I need some magic options to let the GCC C compiler find this header file, e.g. -I /ugly/path/to/include/c++? Have a nice day! -- Sebastian Huber, embedded brains GmbH Address : Obere Lagerstr. 30, D-82178 Puchheim, Germany Phone : +49 89 18 90 80 79-6 Fax : +49 89 18 90 80 79-9 E-Mail : sebastian.huber@xxxxxxxxxxxxxxxxxx PGP : Public key available on request. Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.