Date: Tue, 02 Oct 2012 12:55:27 +0200 From: John Spencer <maillist-musl@...fooze.de> To: musl@...ts.openwall.com Subject: Re: musl for ARM On 10/02/2012 09:27 AM, Brian Wang wrote: > Hello all, > > I am currently thinking of switching to musl from glibc for my target > after some readings on musl. > I would like some advice from musl experts: > * Does it support gettext stuff? musl has no libintl built-in, but i put together a replacement that is capable of building all packages relying on the gettext tools: https://github.com/rofl0r/gettext-tiny at this point, all it does is echo the passed translation string back; i.e. everything's english. however you can compile gnu gettext just fine, if you want to spend 40+ min on its compilation. > * Does it _boost_ the performance on a 400MHz arm926 device? Or it > is just smaller? > By _boost_, I mean if the user can actually feel the improvement > in performance. it will definitely boost shell performance, in that it has a far lower syscall overhead on startup. configure scripts run up to 4x as fast. also, memory usage will be much smaller. a booted up x86_64 sabotage system takes ~2MB RAM, including kernel. > I did try the musl cross project and successfully built a musl-based > arm linux toolchain. > My kernel (2.6.24) was built successfully (not tried it on my device yet). > However, when building busybox, there are some header files clashes, > resulting in conflicting types. > An example of it: > --------------------- > In file included from > /opt/cross/arm-linux-musleabi/lib/gcc/arm-linux-musleabi/4.7.1/../../../../arm-linux-musleabi/include/linux/kd.h:3:0, > from console-tools/kbd_mode.c:23: > /opt/cross/arm-linux-musleabi/lib/gcc/arm-linux-musleabi/4.7.1/../../../../arm-linux-musleabi/include/linux/types.h:12:26: > error: conflicting types for ‘fd_set’ > In file included from > /opt/cross/arm-linux-musleabi/lib/gcc/arm-linux-musleabi/4.7.1/../../../../arm-linux-musleabi/include/sys/time.h:9:0, > from include/libbb.h:45, > from console-tools/kbd_mode.c:22: > /opt/cross/arm-linux-musleabi/lib/gcc/arm-linux-musleabi/4.7.1/../../../../arm-linux-musleabi/include/sys/select.h:25:3: > note: previous declaration of ‘fd_set’ was here > --------------------- > the problem here seems to be the inclusion of linux/types.h, not GCC-related headers. here's a busybox build recipe that's known to work with ARM (at least with kernel 3.0+ headers): https://github.com/rofl0r/sabotage/blob/master/pkg/busybox there's also a prebuilt armv7l rootfs available on that site, check README on the repo for info.
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