Hi,
2014-07-26 9:28 GMT+08:00 Chris Johns <chr...@rtems.org>: > On 26/07/2014 12:25 am, Peng Fan wrote: > >> Hi Chris, >> >> I build a rap file using such a command : >> rtems-ld --lib-path >> /opt/rtems-4.11/arm-rtems4.11/realview_pbx_a9_qemu/lib --lib m --lib >> rtemscpu --lib rtemsbsp --base rtld.prelink --entry rtems a.o b.o c.o >> *.o ... >> Is this ok? can reference a symbol in librtemscpu.a librtemsbsp.a? or >> the reference symbol from librtemscpu.a librtemsbsp.a should be included >> in the base image but not in the rap file? >> > > This is fine. You do not need to load a base image with everything you > might need. > > If you create another RAP file and do the same thing and that RAP pulls > the same code in from one of those libraries it will not be linked to. > Rather the first instance of the code loaded is used. The downside is a > possible waste of code. > Yeah.Other RAP file which references the same code that already in the first rap should not pull the same code into the final image. > > I suppose we could add code to compact the memory and not loaded the > object file and so the overhead is limited to the RAP file. Sorry. I can not got this. what code should be added to rtl-host? > > > >> I set rtems_linkflags like this: >> rtems_linkflags = ['--base', 'rtld.prelink', >> '--lib-path', >> '/opt/rtems-4.11/arm-rtems4.11/realview_pbx_a9_qemu/lib', >> '--entry', 'my_main', '--lib', 'm', '--lib', >> 'rtemscpu' , '--lib', 'rtemsbsp'], >> But waf only uses one '--lib', it removes the other two '--lib', like >> this: xxx '--entry', 'my_main', '--lib', 'm', 'rtemscpu', 'rtemsbsp',xxx >> I am not familar with waf, any advice about his? >> > > Try using LIBS and adding to that. Getting the order correct can be tricky. To bld whose feature is 'c program', libs = ['m', 'xxx'] works. But to 'c rap' which is defined in RTL, adding libs to bld of waf does not work. So I wrote a patch to fix this, the patch first clear the RTEMS_LINKFLAGS env, then refill it. The patch is in the attachments. Regards, Peng. > > Chris >
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