From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3B7B3DDE.6603AFF@mvista.com> Date: Wed, 15 Aug 2001 22:28:30 -0500 From: Mark Hatle MIME-Version: 1.0 To: "Dr. Craig Hollabaugh" Cc: linuxppc-embedded@lists.linuxppc.org Subject: Re: cross compiling 8xx glibc on x86 References: <5.1.0.14.0.20010815184517.00ab30c0@spudcentral.com> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: > ../sysdeps/powerpc/fclrexcpt.c:20: fenv_libc.h: No such file or directory That error is due to glibc not being setup to run w/o floating point on PowerPC. > I fooled around a bit trying to pass the Ipath to gcc for fenv_libc.h. But didn't figure that out. Look at the patch titled "hhl-powerpc-fpu.patch". This will move the files to where they need to be for it to work right. It will also remove the floating point loads/saves in the setjmp/longjmp call. To find out the order of the patches that we apply, just look at the %build section, they are layed out in the order in which they are applied for our product. > Has anyone cross compiled glibc2.2.3 successfully for the 8xx (no fpu)? HHL 2.0 is based on glibc2.2.3pre1 (due to release schedules). But we do have glibc-2.2.3 release working in house, it was trivial since 2.2.3pre1 was already done. > Did you use the GNU source or did you use the MontaVista source? I use MontaVista's Source.. > If you use the MontaVista source, which patches did you apply and in what order? > What's your configure line? > Once you got glibc compiled, how did you check the fpu operation? Printing pi or what? The easiest way is to build bash and use the builtin (shell) printf command and see if it prints out "nan" or the number. If you get the number it is working correctly. One side note, you don't really need the no floating point patches, if you are willing to live with the emulation overhead it works fine in the kernel. However, on the 8xx there is one thing that you can not "live w/o" doing. Specifically you must either "fix" or (easy way) delete the sysdeps/powerpc/memset.S file. This file is hard coded to 8 word wide cache lines.. and the 8xx only has 4 words wide cache. So... if you can live w/ emulation, do that it's easier..... but regardless you will need to delete the sysdeps/powerpc/memset.S file. --Mark BTW the memset.S is being worked on in the PowerPC community to allow for various cacheline optimizations from (4 words) 8xx, to (16 words) Power3/4 series. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/