On Sun, Mar 2, 2008 at 7:03 PM, Brian Dessent <brian@xxxxxxxxxxx> wrote: > "Paulo J. Matos" wrote: > > > timemgm.c:37: warning: C99 inline functions are not supported; using GNU89 > > timemgm.c:37: warning: to disable this warning use -fgnu89-inline or > > the gnu_inline function attribute > > timemgm.c:43: warning: C99 inline functions are not supported; using GNU89 > > timemgm.c:52: warning: C99 inline functions are not supported; using GNU89 > > > > What was the change between gcc version so that now I can't inline > > functions? Why is this? If I can't inline functions, won't this reduce > > the efficiency of my binary, or at least hinder my possibilities of > > optimizing it? > > The warning is not saying what you think it is. What it is telling you > is that the semantics of "inline" which that version of gcc supports do > not match the C99 semantics; they are the "gnu inline" semantics. The > difference has to do with how "extern inline" works. There is a summary > of the differences here: > <http://gcc.gnu.org/ml/gcc/2006-11/msg00006.html> > > Note that in gcc 4.3 this has been rectified, i.e. the changes in that > message have been made. So in 4.3, if you enable c99 mode (instead of > the default which is gnu89 mode) you do actually get the c99 semantics > of inline, which is a change from all past versions of gcc. That is why > the warning was added to 4.2, in anticipation of the change coming in > the next version, so that people that use inline and c99 mode will get > some indication that something might break. > Oh, ok, thank you very much for the explanation. Now I get it why my program fails to compile. It is due to the -Werror. Thanks, Paulo Matos > Brian > -- Paulo Jorge Matos - pocm at soton.ac.uk http://www.personal.soton.ac.uk/pocm PhD Student @ ECS University of Southampton, UK Sponsor ECS runners - Action against Hunger: http://www.justgiving.com/ecsrunslikethewind
