On Sat, Aug 24, 2013 at 5:55 AM, Jeroen Hofstee jeroen@myspectrum.nlwrote:
The movt/movw instruction can be used to hardcode an memory location in the instruction itself. The linker starts complaining about this if the compiler decides to do so: "relocation R_ARM_MOVW_ABS_NC against `a local symbol' can not be used" and it is not support by U-boot as well. Prevent their use by requiring word relocations. This allows u-boot to be build at other optimalization levels then -Os.
Signed-off-by: Jeroen Hofstee jeroen@myspectrum.nl Cc: TigerLiu@viatech.com.cn Cc: Albert ARIBAUD albert.u.boot@aribaud.net
This is useful I think. I'm not sure that -O0 works very well anymore (at least I need to make a few tweaks to use it), but -O1 is useful in some cases to provide better debugging.
Acked-by: Simon Glass sjg@chromium.org