David Brown wrote: > > With -Os, the compiler will obey normal "inline" directives (at least, > that is my experience when compiling C on the avr - I have not tried C++ > much on it). It won't do any automatic extra inlining, except for > static functions that are only used once - which are always inlined as > this saves space. Again, I don't know how that plays with template > functions or other C++ features. > > As far as I know, gcc uses weighting heuristics to decide whether to do > something the rcall you mentioned above, compared to using the inlined > code directly. It is certainly not impossible that the weightings are > not optimal here. > > There is currently very little use of C++ with avr-gcc. The avr port > maintainers and the avrlibc developers have little experience with C++, > and feel they have enough to do with just the C support. But there are > a few people on the avr-gcc mailing list that work with C++, and it is > certainly worth posting there too - they may be able to give suggestions. > > <https://lists.nongnu.org/mailman/listinfo/avr-gcc-list> > > mvh., > > David I see, thx, I'll try there -- Michał Walenciak gmail.com kicer86 http://kicer.sileman.net.pl gg: 3729519
