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Hello, |
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|
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On Monday 02 November 2009 21:22:38 Petric Frank wrote: |
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> > > Is uClinux the proper alternative for this |
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> > |
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> > In general it is the proper alternative for machines without MMU. |
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> > |
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> > > or are the mips kernels available in the portage tree patched to |
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> > > cover this ? |
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> > |
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> > In theory that's possible, but I doubt it. |
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> |
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> Thanks for your hints. |
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> |
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> As far as i understand the cross compile system - the uclibc built by |
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> crossdev is the one the compiled software for the target to be linked |
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> against. Resulting from this the uclibc must reflect the target system |
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> (here especially: no-mmu). |
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> Hope i am right here. |
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> |
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> So i tried to do this using the savedconfig use-flag. I broke to |
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> compilation process while it is compiling uclibc. Then i did a "make |
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> menuconfig" (in /var/tmp/...) and disabled MMU and (as followup) the |
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> target file format to "STATIC FLAT" (i assume PIE is also not possible |
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> because of the missing MMU). |
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> |
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> At restarting the crossdev execution i got an error while installing |
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> uclibc. The compile step of the ebuild went well. At the installation |
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> stage it complains that it is missing "utils/ldconfig.host" when doing |
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> newbin. This can be seen in the ebuild in the src_install step. The |
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> offending line is newbin utils/ldconfig.host ${CTARGET}-ldconfig | die |
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> |
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> So this file seems not to be generated during the uclibc built process when |
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> PIE is off. This applies to ldd.host also. |
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> |
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> What to do now? |
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> Skip this files in the ebuild ? |
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> |
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> Or am i doing too much and the uclibc code is clever enough to disable mmu |
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> logic when the taget it is running on doesn't have it ? |
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|
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Ok - finally i got the toolchain compiled for mips-nommu using sys- |
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devel/crossdev - with some (dirty) patches. |
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Patch 1: ebuild of uclibc - remove " ... | die" suffix when trying to install |
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ldconfig and ldd as they are not there for nommu case |
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Patch 2: for building uclibc use savedconfig use flag. Use modified config to |
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disable mmu and generate static libs only |
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Patch 3: (the worst one) - add a line to toolchain.eclass to add the option -- |
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disable-static to the configure string |
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Maybe this all should into a new use flag for gcc and uclibc named (for |
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example) "nommu". |
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Or an extension to crossdev is a better place ? |
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|
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Would this be worth a bugzilla ticket (against which target ?) ? |
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|
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regards |
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Petric |
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