In the need for updated toolchains for sparc and sparc64 I have started adding support for sparc in crosstool-ng[*]. In this process I have tested several gcc versions. I tried to build for and test a kernel on my sparc classic box (32 bit). gcc version Result 4.4.1 OK (kernel builds and the final kernel can boot) 4.4.2 Not tested 4.4.3 Not tested 4.4.4 BAD (Kernel can build but fails during boot) 4.4.5 BAD (Kernel can build but fails during boot) 4.5.1 BAD (Build fails with a spill related ICE - http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35664) 4.5.2 OK (kernel builds and boots) This is all provided for information only in case others decides to play with recent gcc versions on sparc (32 bit). The boot failure I see manifest itself like this in the boot log: Freeing initrd memory: 4108k freed BUG: Bad page state in process swapper pfn:0037a page:f09ad7a0 count:0 mapcount:0 mapping: (null) index:0x0 page flags: 0x80000(buddy) [f006b918 : free_hot_cold_page+0x18/0x1cc ] [f001d614 : free_initrd_mem+0x9c/0xd0 ] ... And later it hangs with "rcu_sched_state detected stall on CPU 0 (t=15000 jiffies) I have not tried to track down the cause of the boot failure. A quick search did not reveal any gcc bugzilla entry. [*] I tried to build a toolchain manually but I never found a decent HOWTO - so gave up and went for crosstool-ng. Adding sparc support to crosstool-ng also helps much more people than a random howto somewhere on the net. I will announce it on this list when crosstol-ng has sparc support included. See http://ymorin.is-a-geek.org/projects/crosstool for more info on crosstool-ng. Sam -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
