"Brian D. McGrew" <brian@xxxxxxxxxxxxx> writes: > I just read on stackoverflow that if we compile with -pthreads, malloc is > thread safe on x86 and x86_64 hardware. Is this true??? > > If so, what version of gcc/g++ is that implemented in? > > We're using CentOS 5.3_x86-64 and gcc-4.1.2-20080704 and about 90% of our > projects are compiled with g++ using -g -O2. Functionally speaking, is > there any reason I should upgrade gcc --- other than just to have the latest > version? It's not true, at least not for GNU/Linux. malloc is thread safe on GNU/Linux regardless of whether you use -pthread or not. In any case, it's really a function of your version of glibc rather than a function of your gcc. That is, you should be asking which version of glibc provides a thread-safe malloc, not which version of gcc. And the answer in your case is that the version of glibc you are using has a thread-safe malloc. Ian
