http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47571
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-01 16:13:24 UTC --- How many fortran users actually need to more precise DATE_AND_TIME though? Bringing in -lpthread (as dependency of -lrt) certainly has some extra overhead, e.g. everything that uses gthr* will suddenly use real locking. You could e.g. use clock_gettime only through a weakref, thus let the users choose if clock_gettime should be used or not. If they don't link in librt, less precise implementation would be used, if they do link it in, it would become more precise (-lrt would be linked in automatically e.g. for -fopenmp compilations).
