Hi,
On 16-04-16 10:58, Robert P. J. Day wrote:
(WARNING: many potentially dumb questions coming this weekend as i try to put together a u-boot tutorial for some upcoming presentations. please be patient ... )
i had a much longer question about the config option SYS_MALLOC_SIMPLE until i noticed that it doesn't seem to be defined in a Kconfig file:
$ grep -rw SYS_MALLOC_SIMPLE * common/malloc_simple.c:#if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE) include/exports.h:#if !CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE) include/_exports.h:#if !CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE) include/malloc.h:#if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE) $
that appears to be the extent of that symbol in the entire u-boot source tree, which is obviously different from:
$ grep -rw SPL_SYS_MALLOC_SIMPLE * arch/arm/Kconfig: select SPL_SYS_MALLOC_SIMPLE if SUPPORT_SPL arch/arm/mach-rockchip/Kconfig:config SPL_SYS_MALLOC_SIMPLE Kconfig:config SPL_SYS_MALLOC_SIMPLE Kconfig: depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE $
There is some magic happening somewhere whereby SPL_FOO_BAR Kconfig settings only get set when builind the SPL and they actually get set as FOO_BAR, so the SPL_ prefix is special and tells the u-boot build scripts to only define FOO_BAR when building the SPL, this goes for all SPL_ prefixed Kconfig settings. This all is IIRC.
Regards,
Hans