Hi I want to install an older version of gcc, and see if it solves some of my problems. I have the following questions:
1. Which version of gcc should I install? I saw somewhere that >=3.2 is recommended - is the latest 3.x version (3.4.6) the best, or is an earlier version perhaps better? (Which version are you using?) 2. Do I need to recompile everything with the newly installed gcc (patched kernel, RTAI, RTnet)? 3. From the RTAI user manual it seems that the re-compilation process for RTAI consists of running "make reconfig CC=/my/favorite/c/compiler", and then "make". Is the process for RTnet and the patched kernel identical? Or should I simply change a symlink for gcc somewhere and re-build all? Thanks Thinus -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 01 August 2006 12:47 To: Thinus Viljoen Cc: rtnet-users@lists.sourceforge.net Subject: Re: [RTnet-users] RTnet in RTAI kernel space Thinus Viljoen wrote: > Jan > > Calling rtdm_in_rt_context() returns the following values in the following > functions: > init_module(): 0 > recv_msg(): 1 > send_msg(): 1 > This is correct, I assume? Yep, all fine. That would have been too easy... > > Regarding the rt_assign_irq_to_cpu: I am not too sure what it is for, I am > ashamed to say - it is used in some RTAI showroom examples, and in particular > one that I copied&pasted some code from. I removed it, and it didn't seem to > make any difference. As you are on UP anyway, this IRQ assignment makes surely no sense here. But it /shouldn't/ cause harm as well. > > Another question - is it necessary to include rtdm/rtdm.h? Nope, rtnet.h does so. > > Some facts that might be relevant: > > 1. When compiling I get the following warning: > /usr/realtime/include/rtai_sanity.h:24:2: warning: #warning : You are likely > using an unsuported GCC version! Please read GCC-WARNINGS carefully. > I can't find this GCC-WARNINGS file (a post on the net refers to the RTAI > source tree, but I can't find it there). I am using GCC 4.1.0. Oh, may explain some weirdness, don't know if also the -38 error. Do you have some other compiler at hand to cross-check? I don't know why RTAI has to warn about recent compilers. The only bug I've seen in the wild so far was a freaky corner case (in combination with kgdb). It will be fixed in 4.1.1 and should not affect RTAI anyway. > > 2. Every now and then I get the following message: > UNEXPECTED FPU TRAP FROM HARD PID = xxxx (The PID is for "insmod > rtai_lxrt.ko") > > 3. Sometimes, after multiple module load/unload/recompile etc. cycles, every > key that I press is repeated about 20 times (or the PC hangs). I then have to > reboot. Sometimes after the reboot the PC hangs during the boot process, but > then boots OK after a further reboot. > > 4. My machine is a AMD Athlon 1.4GHz, with a AMD761 K7 chipset. That three issues can be related to RTAI's issues with the compiler (RTnet is proven to be fine with 4.1). But the -ENOSYS issue remains unexplainable to me. In any case, this very much looks like a RTAI-related issue now. Maybe someone can jump in here, or you could post your findings (with code) on the RTAI list. I'm sorry that I cannot help, but there are too many RTAI-unknowns for me. Jan ******************************************************************************************************* Disclaimer: The information contained in this communication is confidential and may be legally privileged. It is intended solely for the use of the individual or entity to whom it is addressed and others authorised to receive it. 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