Two problems to fix in order to allow compiling for ARM.
The first was to add the proper "Boost::Context assembly wrapper" files
for ARM, and modify common/system/fcontext.s to include them. The files
'jump_arm_aapcs_elf_gas.S' and 'make_arm_aapcs_elf_gas.S' I acquired
from the boost_1_55_0.tar.bz2 download from http://www.boost.org/
The second parch is for a fake rdtsc() function in include/profile.h to
make the compiler happy. I'm not a c++ programmer so I don't actually
know what the right thing to do is, but I'm sure returning the number
'42' isn't it. ;-) There seems to be a cycle counter register built
into ARM CPUs similar to the TSC register in x86 CPUs, but reading it is
not trivial just google 'arm cycle counter' to see what I mean.
But with these two patches I'm able to compile under Arch linux ARM on
my Chromebook
(http://archlinuxarm.org/platforms/armv7/samsung/samsung-chromebook) and
it seems to be running well.
Both patches are against revision 4499 of the lp:kicad branch.
