On 03/02/10 19:53, Vincent Richomme wrote: > When trying to compile opencflite I get the following error : > > configure: checking for compiler atomic built-ins > checking whether the target supports __sync_fetch_and_add... no > configure: error: Support for __sync_fetch_and_add is required. > > Dont' know what it means and how to fix it. > Any sugestions ? __sync_fetch_and_add is a built-in gcc function. It's not working for some reason. The way to fix it depends on the machine, the OS, and the version of gcc you're using. Andrew.