Hi!
Is it possible to compile DROPS with GCC 4 now?
I still get the following error:
make[2]: Entering directory `/home/osk/tmp/dropsupdate-060619-163030/drops-060619/l4/pkg/l4io' Makefile:8: *** Wrong gcc major version "" - use 3.x for l4io. Stop. make[2]: Leaving directory `/home/osk/tmp/dropsupdate-060619-163030/drops-060619/l4/pkg/l4io'
Best regards Oskar.
Hi Bjoern!
Bjoern Doebel schrieb:
Is it possible to compile DROPS with GCC 4 now?
No, because there are some applications using Linux 2.4 sources (l4io, dde_linux, ORe, ...), which in turn do not compile with GCC4.
Do you have experience in linking libraries compiled with GCC 3.x with other code compiled with GCC 4? Within EMSCB we try to move towards recent GCC versions and therefore currently encounter this problem.
Do you have a list of packages not compatible with GCC 4 due to the above reasons? Probably we don't need these packages anyway. BTW: Why does l4io need Linux 2.4 sources? And: I thought you already moved to Linux 2.6 completely?
Regards Oskar.
Hello,
Is it possible to compile DROPS with GCC 4 now?
No, because there are some applications using Linux 2.4 sources (l4io, dde_linux, ORe, ...), which in turn do not compile with GCC4.
Do you have experience in linking libraries compiled with GCC 3.x with other code compiled with GCC 4?
No, I'm sorry.
Within EMSCB we try to move towards recent GCC versions and therefore currently encounter this problem.
DROPS only supports GCC major number 3 up to now. Many packets should compile with GCC4, but those that use Linux kernel sources will not do so until we switch everything to Linux 2.6.
Do you have a list of packages not compatible with GCC 4 due to the above reasons? Probably we don't need these packages anyway.
The following packages in my local L4 tree reference the LINUX24_INCDIR make variable:
dde_linux dsound l4io nethub ore socket_linux usb usbhid video
BTW: Why does l4io need Linux 2.4 sources?
Because it accesses PCI hardware. (rest of explanation below)
And: I thought you already moved to Linux 2.6 completely?
Note, that here is a difference between L4Linux and the use of Linux sources in DROPS. L4Linux is always at the latest 2.6 kernel version and works.
To provide an easy way for direct hardware access from L4 servers and to support a large amount of hardware, DROPS uses legacy Linux device drivers. This is achieved by emulating a Linux driver environment through dde_linux (http://tudos.org/papers_ps/helmuth-diplom.pdf) and running the device drivers (nearly) unmodified within L4 servers.
dde_linux currently supports Linux 2.4 and moving it to 2.6 is on the agenda, but I cannot tell you when this will be finished (the sooner the better...).
So far Bjoern
Hi Bjoern!
Thank you for your answer!
The following packages in my local L4 tree reference the LINUX24_INCDIR make variable:
dde_linux dsound l4io nethub ore socket_linux usb usbhid video
Ok, this doesn't look as if we would need these packages ...
dde_linux currently supports Linux 2.4 and moving it to 2.6 is on the agenda, but I cannot tell you when this will be finished (the sooner the better...).
I know DDE and the difference to L4Linux. I thought you already moved DDE to 2.6, that was the misunderstanding.
Best regards Oskar.
Oskar,
On Wednesday 21 June 2006 15:38, Oskar Senft wrote:
Ok, this doesn't look as if we would need these packages ...
Please note that gcc4 is currently not official supported for L4 packages (in contrast to the Fiasco kernel). Therefore the packages you need _may_ compile fine but the binaries could still contain wrong code which is probably hard to find. Just a friendly warning. :-)
I'm sure that the Dresden OS group works hard to get the code ready for gcc4)
Kind regards,
Frank
Hello Oskar,
On Wed, Jun 21, 2006 at 03:38:41PM +0200, Oskar Senft wrote:
l4io
[...]
Ok, this doesn't look as if we would need these packages ...
additionally to Frank's post about supported GCC versions, I'd like to remind you that some configurations (e.g., L4Linux) may not work in the future without the L4IO server.
Cheers
l4-hackers@os.inf.tu-dresden.de
-
Bjoern Doebel -
Christian Helmuth -
Frank Mehnert -
Oskar Senft