Date: Wed, 15 Jul 1998 23:16:49 +0000 (GMT) From: Annelise Anderson <andrsn@andrsn.stanford.edu> To: Joseph Koshy <jkoshy@FreeBSD.ORG> Cc: freebsd-doc@FreeBSD.ORG Subject: Re: Linux-FreeBSD Q&A Message-ID: <Pine.BSF.3.96.980715231441.4917C-100000@andrsn.Stanford.edu> In-Reply-To: <199807160142.SAA22565@hub.freebsd.org>
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Terrific, especially with Jordan's blessing! Can you incorporate his suggestions, and possibly find urls for the references to the Linux howto and other stuff? Anybody else? Other questions? Nice turnaround time :) Annelise On Wed, 15 Jul 1998, Joseph Koshy wrote: > > > (http://freebsd.stanford.edu/FreeBSD/linux.html) > > Some answers to your questions with parenthetical comments needing further > discussion by the list in curly braces "{}". > > Q: Do gcc and cc work the same under FreeBSD as they do under linux? > A: Fundamentally yes. The version of GCC in the current FreeBSD > release is "v2.7.2.1" and this should behave identically to a GCC v2.7.2.1 > compiler under Linux. > > Numerical programs using floating point may sometimes show different > behaviour; FreeBSD does not by default mask off floating point exception > conditions like numeric underflow or loss of precision and will attempt to > notify the program using a signal when this happens. If the program has > not arranged to handle this signal, it will be terminated by the kernel. > > Some {all?} versions of the Linux kernel do not enable detection of these > numeric exceptions by default, and consequently the same programs will run > without apparent errors under Linux. The accuracy and reliability of the > results generated may not be that expected however. > > { Is this description accurate? } > > Q: Does FreeBSD run ELF binaries? (Is that the right question?) > A: Yes, FreeBSD can run ELF binaries without any problem. > Linux ELF binaries work fine too under Linux emulation, though older > binaries > may need to be "branded" before use using the `brandelf' utility. > > { There is a (small) section on "branding" in the Handbook, we could > point people to this: ``23.1.4. Installing Linux ELF binaries''.} > > > Q: Will I be able to mount Linux file systems under FreeBSD? > A: Yes, you can mount Linux "ext2" file systems under FreeBSD. Use > > # mount -t ext2fs /dev/wd0s1 /mnt > ^^^^^^^^^^ > this is the device name for your linux partition > > Note that the device numbering scheme used by Linux is different from > that followed in the BSD world. For example, "/dev/hda" under Linux > could appear as "/dev/wd0s1" under the BSD naming scheme. > > > Q: Can I install FreeBSD on the same hard drive as Linux? > A: Yes. You can install FreeBSD in another primary partition on the hard > disk. > > { You can even arrange for FreeBSD to use Linux's swap partition, > (there was a discussion on this point on -hackers sometime > back), but this may be a bit advanced for a introductory howto. } > > { Note: I think that the default bootloader "booteasy" doesn't > support booting from a secondary ("extended") partition. Is this > correct? } > > { We could point people to the FreeBSD+LILO HowTo on the WWW and the > FAQ entry on this topic too. } > > Q: If I install FreeBSD on the same computer on which I've got Linux, will > Linux lilo work? > A: Yes. See the FAQ ``How do I boot FreeBSD and Linux from LILO?'' > and ``How do I boot FreeBSD and Linux using BootEasy?''. > > > -- > Koshy > <jkoshy@freebsd.org> > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message
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