Jivin Michael Schnell lays it down ... > > >>(Which IMHO in many cases seems silly, as AFAIK, you can happily use > >>vfork() if there is > >>an MMU, too, in nearly (?) all cases when you can _simply_ (without > >>any other code change) replace fork() with vfork() anyway. ) > >Yes, pretty much true... > > But userland software I all over the place see funny #defines for "fork" > or things like > > #ifdef EMBED > p = fork(); > #else > p = vfork(); > #endif
You're right, just checked and there are about 7 apps affected. I thought we had cleaned all that usage out but obviously not, might just do it now :-) > >>Moreover the name of the "EMBED" define seems quite outdated, as > >>today, many embedded devices do provide an MMU. > >Yes, definitely true. I tend not to use it any more. > OK, but what to do about already existing code .... Fix the usage of it :-) > >>I don't know if there is some change on that issue planned (e.g. > >>using CONFIG_MMU, in User Land as well). > >Currently I use __uClinux__ in userland for this. (Which isn't perfect > >either, if you use a standard gnu linux configured gcc for compiling > >uCLinux systems you need to manually define it too). > The NIOS uCLinux, I'm working with, some day soon will get a > configuration setting if or if not an MMU is to be used, as the CPU > itself can be configured to feature an MMU or not. > > The "powers" (Thomas) decided that it still is called a uCLinux > distribution..... > > So maybe a setting "USE_MMU" or something like this seems more appropriate. IIRC the uClinux-dist adds the __uClinux__ for !MMU builds, so even if the toolchain doesn't define it you are ok. Cheers, Davidm -- David McCullough, david_mccullo...@securecomputing.com, Ph:+61 734352815 Secure Computing - SnapGear http://www.uCdot.org http://www.snapgear.com _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
