That is probably a bad example. That is a GNU extension, so if handling this via the preprocessor, the right guard should just be #ifdef __GLIBC__, I think. Tha

That is probably a bad example. That is a GNU extension, so if handling this via the preprocessor, the right guard should just be #ifdef __GLIBC__, I think. That should cover both glibc and glibc-compatible libcs such as uClibc. (Yes, uClibc does define __GLIBC__ as well.)